The 2nd Monitor

rolfl

12:00 AM

In your main method, type Arr and then Ctrl-space.

Simon André Forsberg

@DanLyons What other options can there be?

nhgrif

Down with tabs.

Spaces only is better.

rolfl

OK, Jamal, your FizBuzz project in Eclipse was probably imported wrong, or you did a copy/paste wrong.

I recommend deleting it, and starting over.... ;-) It's easiest at this point.

Jamal

It does work for Junk, just not the original attempt.

rolfl

Right now, your code is in the directory src/FizzBuzz/FizzBuzz.java

or something.... but, the src and bin folders are messed up.

Dan Lyons

12:03 AM

I've seen several calls for contextual indentation, including one page that had a semi-working prototype example. I'll see if I can dig it up. It was cool in concept if poor in execution.

rolfl

there are probably .settings folders that aremessed up as well.

Fixing these things can be harder than restarting them.

When you understand that packages are just directories under src/*, then you can drop/move code in to that folder, and things just work.

Jamal

I have wiped out everything else, started out fresh, and it's running again.

rolfl

Good, that's what I would expect.

Something funny happened, and it got messed up somehow.

now it's clean.

Simon André Forsberg

@Jamal ~~Don't forget to also wipe out all your existing C++ projects~~ I shouldn't push it, should I?

Jamal

lol

rolfl

12:07 AM

It was probably just bad beginner's luck... you did something wrong, and were not aware of the consequences.

So, there are some things that you will find useful......

Captain Obvious

0

Q: Where should the code for insertion sort used by quicksort go?

Quicksort is good for large arrays but when the array to be sorted is small (i.e. length 10 or less) then another sorting algorithm, such as insertion sort, should be used. I'm putting together a class for Quicksort. Right now I have a method called insertionSort() that does insertion sort. How s...

Jamal

I just didn't know there would be that much to it. Again, I'm comparing it to setting up a C++ project.

rolfl

And setting up a C++ project is easier?

with make, conf, etc.?

It is just a familiarity thing, that's all.

Jamal

Through an IDE, I mean.

Simon André Forsberg

@Jamal I bet that I would encounter at least as many problems as you did if I were to setup a C++ project (which I am willing to try some day)

rolfl

12:10 AM

Anyway, if you go to your fizzbuzz code.

the main method has String[] args

Simon André Forsberg

Meanwhile, I guess I'm eating my words:

1 hour ago, by Simon André Forsberg

@Jamal If you can show a screenshot I bet I would find the problem instantly.

rolfl

if you click on String.... and press f3 .... what do you get?

Jamal

String.class

Simon André Forsberg

@Jamal Do you see the source or do you see gibberish?

rolfl

The source ?

Jamal

12:11 AM

"Source not found"

rolfl

OK, let's fix that.

Simon André Forsberg

^^ Gibberish

rolfl

you downloaded and installed the Java 8 JDK?

Jamal

Yes

rolfl

Right, Window -> Preferences.

Java -> Intalled JRE's

nhgrif

12:13 AM

Again.

rolfl

Do you have an entry that points to the Java you installed?

Jamal

Yes, jre8 (default)

rolfl

OK, jre is not so nice, you want jdk.

nhgrif

Programs don't run how we'd like them to. Programs run how we tell them to. — nhgrif 6 secs ago

ckuhn203

Awesomesauce^

rolfl

12:14 AM

Every Java JDK (Java development kit) ships with the JRE (Java runtime environment) as a subdirectory of the JDK install.

We want to add a new installation..... so, add a new one.

nhgrif

Unfortunately, we frequently have to make several attempts at telling the program how to run before we tell it correctly.

rolfl

It's a 'Standard VM'.

in the next tab, browse to the jdk you installed..... (not a jre subdirectory).

Jamal

Okay

rolfl

Call it Java8 or something.

click 'finish'.

Back at the 'installed JRE's tab, select the chckbox next to Java8 as the 'default' runtime.

Jamal

It's greyed out. What about JRE home?

rolfl

12:17 AM

JRE home should be pointing to the directory with the JDK.

Simon André Forsberg

TTGTB here. I'll leave you in monkey hands, @Jamal. Code safe :)

:-)

@rolfl jdk1.8.0_05?

Sounds good.

Click on the jdk-1.8.0_05 (not the jre folder).

Jamal

12:19 AM

Okay

rolfl

Call that Java8.

nhgrif

I really wish that didReceiveMemoryWarning would stop having a default method stub in UIViewController subclasses. :/ Hardly anyone uses it... and if you need to use it, you're probably not a moron that can't figure out that the method exists...

Jamal

@rolfl Okay, I have checked the box next to Java8 (default)

rolfl

Set Java8 to be the default.

good.

Hit apply, and it should ask you if you are sure, and recompile your programs.

Jamal

It still runs

rolfl

12:21 AM

it should, but, what if you press f3 on top of String now?

Jamal

"Source not found"

rolfl

OK, so there's one more step.

In your project view, there's an entry "JRE System Library"

It has something other than "Java8" in parenthesis after it.

right?

31 mins ago, by rolfl

I'm talking about that.... ^^^^

Jamal

No

nhgrif

Holy mother of God... I was about to start fiddling around with Swift... but I can't. I just can't do it. They still don't have access modifiers....

rolfl

No, it says "Java8" or No, it does not say "Java8".

Jamal

12:26 AM

It doesn't show the JSE System Library.

rolfl

Are you in the package-view or the navigator view?

Jamal

Oops...
Okay, now I see it.

rolfl

Java8 ?

Alex L

Hey any Java guys in the house?

nhgrif

Nope.

Jamal

12:28 AM

JavaSE-1.8

rolfl

Jamal's here ;-)

Alex L

Oh it looks like javas the topic rn!

Jamal

sucks thumb

rolfl

Did you call the link you made Java8 ?

Alex L

Anyone have any idea how to pad a byte[] with zeros?

Jamal

12:29 AM

Installed JREs? Yes

rolfl

OK, right-click the JRE System library, go to Build Path-> Configure Build path

it should be highlighting the JRE System Library.

Jamal

Okay

rolfl

Click 'edit' on the right.

Choose the "workspace default" radio button.

(which should be Java8)

Jamal

Yes

rolfl

Finish, and go back to your code.

Jamal

12:31 AM

I get something for String

rolfl

Now what do you have behind f3 for String... ;-)

OK.

Now, right-click the word 'for' in your main method.

I lie, don't do that....

put the cursor on the for-line.

you on it? and press Ctrl-shift-B

A little blue icon shoul dhave appeared in the left margin.

Jamal

Yes

rolfl

OK, right-click the main method, and chose "Debug as ...."

Java Application

It should ask you if you want to change to the Debug Perspective.

Jamal

Yes

rolfl

Say yes... ;-)

Jamal

12:35 AM

yes... ;-)

rolfl

You will notice at the top-right of eclipse there's a debug perspective 'tab' and a Java tab.

you can switch between modes by using those tabs.

Jamal

Okay

rolfl

Your 'for' loop line should be highlighted.

you can step in with f5, step over with f6, step out with f7, and continue to next breakpoint with f8

Dan Lyons

It runs the method in the debugger or else it gets the hose again.

Jamal

Okay

rolfl

12:38 AM

Alright, in the debug mode you can inspect all variables all the way up the call stack.

It is very useful.

you can also step in to any of the system code as well, and walk though how Java does string, integer, whatever manipulation.

to add a break point, see where that blue-icon is in the left-margin?

Jamal

Yes

rolfl

you double-click on that margin, on your line of code.

that will toggle the break point.

The inegrated debugger is at least half the value of any IDE... now you know where to find it.

If you want to run an application you have run before, you find the green 'play' button on the tool bar, and drop it down to select it, or, play the last applciation run.

The same is true for the 'debug' button.

In Java/Eclipse, you can change the code in a running debug session.

Dan Lyons

In many IDEs (I'm sure in Eclipse also) you can also set the breakpoints to only trigger under certain conditions

rolfl

So, you can edit a line you don't like, and the debugger will reverse out of that scope, and then re-enter it with the new code.

Jamal

I see. How do I stop Eclipse from highlighting the for line?

rolfl

12:42 AM

this is a great feature, but sometimes the variables/state of the system is wrong because the pre-change code did something.

Well, you are currently running the program, you need to stop it.

There's a red square in the debug perspective.

or on the console view.

Jamal

Got it

rolfl

Your eclipse should now be set up for you for a while.

ny new projects will have the right Java by default.

you can breakpoint in any code, and the source is available.

Jamal

From this point, I can follow along in the book. It continues with intro to OO.

rolfl

with the source available, you also get the nice-name variables for some things, and the hover-over on your code will pull up better documentation

Now, you are 'up and running', agreed.

you should create projects for things that are unique... create a new one for each exercise if it makes sense.

you can open, and close projects.... close ones that you are not using, and it saves some eclipse processing time

Eclipse does incremental builds for Java, compiling only things that it thinks need to be compiled.

Jamal

Okay. Would the package be given a name related to the exercise?

rolfl

12:48 AM

Typically a package is based on a domain name, and a library name....

something like org.apache.httpserver.*

or org.jdom.*

if you are ibm, you would have things like:

com.ibm.db2.jdbc.....

packages solve the same problems that namespaces solve in C++

Jamal

Ah

But without the using namespace std crap? :P

rolfl

essentially, but, everyone on Code Review uses the default namespace... ;-)

(no package).

We just don't bitch about it ;-)

Jamal

So I didn't even need one? I just called it "fizzbuzz"

rolfl

you called it 'FizzBuzz' the class .... there was no package

if it was in the package com.gmail.jamal.learning ...

(many individuals use their e-mail address if they need a package).

(you are not jamal@gmail.com, are you?)/

Jamal

It's a different address.

rolfl

12:52 AM

I have my tuis.net domain ... ;-) (and jdom.org).

Jamal

So, should I try another Junk, but without a package?

rolfl

package and project are different

in your junk project, you have the 'default package' folder with FizzBuzz.java in it... right?

right-click, and choose "new package"

call it "se.cr"

(for codereview.stackexchange)

Jamal

I have already removed Junk.

rolfl

then, drag the FizzBuzz.java file to the new se.cr package.

Well, wherever you are ;-)

After dragging the .java file to the package, edit it in the new location, and you will see the first line of the file is now package se.cr;

the official name of the class is now se.cr.FizzBuzz

Jamal

I have fizzbuzz -> src -> se.cr -> FizzBuzz.java

rolfl

12:56 AM

Look at the FizzBuzz source now....

what's the first line....?

Jamal

package se.cr;

rolfl

your eclipse project is called fizzbuzz, your code is in the src folder, you have a package called se.cr (which is identified in a directory called fizzbuzz/src/se/cr/ )

and the Java class name is FizzBuzz and is in the file fizzbuzz/src/se/cr/FizzBuzz.java

Yup

Good, it's all good.

I KNOW JAVA

1:00 AM

better than most ^^^

Jamal

Hopefully that'll put me at an advantage this fall.

rolfl

If you want to pull someone's code from Code Review, the best way I know of, is to go to your default package, and create a new class with the same name as the CR class.

then, ctrl-A, del, and Ctrl-v the CR code.

Java requires that the class name of the (public) class in the file matches the name of the file, and that the package name in the file matches the relative folder of the file.

(it's a compatibility thing).

Jamal

So now I can finally test the code that I review. :-P

I need to have public types defined in their own files?

nhgrif

0

Q: Is this FizzBuzz Swift-y?

for (var i = 1; i <= 100; ++i) { var fizzBuzz = "" if i % 3 == 0 { fizzBuzz += "Fizz" } if i % 5 == 0 { fizzBuzz += "Buzz" } if fizzBuzz == "" { fizzBuzz += "\(i)" } println(fizzBuzz) } I don't really like comparing strings with ==, bu...

fizzbuzz swift

This is cool, by the way:

See the stuff in the right hand margin?

rolfl

@Jamal Java typically has only one class in each file. It requires only one publiv class per file.

You can have nested classes (quite common) which is a class inside another class.

Jamal

1:12 AM

Ah

I'm just testing some code I found from the front page.

rolfl

For example, a linked list may have a Node inner class.

The linked list may be called 'net.tuis.LinkedList

the node would be net.tuis.LinkedList.Node.

Captain Obvious

0

Q: Is this FizzBuzz Swift-y?

for (var i = 1; i <= 100; ++i) { var fizzBuzz = "" if i % 3 == 0 { fizzBuzz += "Fizz" } if i % 5 == 0 { fizzBuzz += "Buzz" } if fizzBuzz == "" { fizzBuzz += "\(i)" } println(fizzBuzz) } I don't really like comparing strings with ==, bu...

fizzbuzz swift

rolfl

The Java would look like:

public class LinkedList {
    private class Node {
        ....
    }
}

It is possible, but very frowned on, to have:

class Node {
    ....
}
public class LinkedList {
}

in a single file.

Jamal

The former is how I would do it anyway.

rolfl

The latter would have two classes net.tuis.Node and net.tuis.LinkedList.

People expect to find net.tuis.Node in the file net/tuis/Node.java

but, it would be in net/tuis/LinkedList.java

Jamal

1:16 AM

I'll have plenty of JDQ code to test. :-)

rolfl

So, don't do it.

That neither ;-)

Jamal

I'll look through some JDQs and see what I can implement myself. I'll spare you all another crappy linked list. :P

rolfl

A not-crappy linked list would be welcome!

Jamal

Nah, I'll try something else first, maybe from the book. I can't even make a good one in C++...

Jamal

1:33 AM

@Corbin: By the way, can I get full C++11 support with Eclipse, or am I still out of luck?

rolfl

1:48 AM

Tomorrow ......

tomorrow, I overflow:

> 255 days, 255 consecutive

Malachi

@SimonAndréForsberg it's not hump day....I missed that one again this week....ugh

@rolfl Very nice!!!

syb0rg

2:07 AM

First Swift answer:

2

A: Is this FizzBuzz Swift-y?

Is this FizzBuzz Swift-y? Kinda, but it could be a lot better. Here's what I would do to fix it: Extrapolate this code into a method, then call the method from the for loop. func fizzbuzz(i: Int) -> String { // ... } There is a handy Swift feature called "Tuples". Tuples are grouping...

@nhgrif You downloaded it as well?! Awesome!

rolfl

+1'd already, but still looking for swift switch syntax documentation

syb0rg

@rolfl Most of what I said in the comment came directly from the Apple documentation. The last sentence was speculation however. The code does run correctly when I have it like that.

rolfl

> Although the actual execution order of pattern-matching operations, and in particular the evaluation order of patterns in cases, is unspecified, pattern matching in a switch statement behaves as if the evaluation is performed in source order—that is, the order in which they appear in source code.

> As a result, if multiple cases contain patterns that evaluate to the same value, and thus can match the value of the control expression, the program executes only the code within the first matching case in source order.

developer.apple.com/library/prerelease/mac/documentation/Swift/…

as I read it, the code should never produce FizzBuzz output because all FizzBuzz's also match just Fizz.

syb0rg

Hmm, I'll modify my answer until I can find direct documentation as to why it works.

This is the console output with the case right before the default:

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
Fizz
16
17
Fizz
19
Buzz
Fizz
22
23
Fizz
Buzz
26
Fizz
28
29
Fizz
31
32
Fizz
34
Buzz
Fizz
37
38
Fizz
Buzz
41
Fizz
43
44
Fizz
46
47
Fizz
49
Buzz
Fizz
52
53
Fizz
Buzz
56
Fizz
58
59
Fizz
61
62
Fizz
64
Buzz
Fizz
67
68
Fizz
Buzz
71
Fizz
73
74
Fizz
76
77
Fizz
79
Buzz
Fizz
82
83
Fizz
Buzz
86
Fizz
88
89
Fizz
91
92
Fizz
94
Buzz
Fizz
97
98
Fizz
Buzz

No differences when I move the case either... odd.

rolfl

@syb0rg And that's broken results....!!!!

ther'e no FizzBuzz at 15.

just Fizz

> Unlike C, Swift allows multiple switch cases to consider the same value or values. In fact, the point (0, 0) could match all four of the cases in this example. However, if multiple matches are possible, the first matching case is always used.

syb0rg

2:17 AM

@rolfl Ohhh, that problem is fixed with your modification...

rolfl

from: developer.apple.com/library/prerelease/mac/documentation/Swift/…

syb0rg

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
16
17
Fizz
19
Buzz
Fizz
22
23
Fizz
Buzz
26
Fizz
28
29
FizzBuzz
31
32
Fizz
34
Buzz
Fizz
37
38
Fizz
Buzz
41
Fizz
43
44
FizzBuzz
46
47
Fizz
49
Buzz
Fizz
52
53
Fizz
Buzz
56
Fizz
58
59
FizzBuzz
61
62
Fizz
64
Buzz
Fizz
67
68
Fizz
Buzz
71
Fizz
73
74
FizzBuzz
76
77
Fizz
79
Buzz
Fizz
82
83
Fizz
Buzz
86
Fizz
88
89
FizzBuzz
91
92
Fizz
94
Buzz
Fizz
97
98
Fizz
Buzz

rolfl

Good, my instincts are still good... ;-) Never programmed swift before, but I can still spot logic errors.

syb0rg

@rolfl I'm veeeeery new to it as well. As in learning some fancy Swift tricks before answering that question new.

Such as the underscore trick with Tuples

Jamal

2:52 AM

std::string::front() requires C++11? I had no idea.

Jamal

3:05 AM

Congrats on the java goldie, @SimonAndréForsberg!!!

5

200_success

I like that Swift makes the braces mandatory and the parentheses optional for if, while, etc.

rolfl

One little apple bug, and everyone pays ... ;-)

200_success

Your tone implies that you disagree with my opinion?

rolfl

Acually, I agree with you, (well, about the mandatory braces anyway).

But, I was trying to imply the reasons were because of Apples' recent embarassing bug

nakedsecurity.sophos.com/2014/02/24/…

instead of following code-style practices to fix the bug, they create a whole new language that makes a lot of other bugs possible, but closes that particular loophole

200_success

3:24 AM

@Jamal One detail about the inner class that rolfl didn't mention: a static inner class would generally be preferable.

200_success

3:35 AM

@nhgrif Does that screenshot violate some kind of NDA?

Jamal

@200_success Would that apply to all inner classes, or are there some exceptions?

200_success

Situational.

If you don't need the inner class to be associated with an instance of the containing class, though, make the inner class static.

For clarity.

Corbin

@Jamal probably. I typically use Netbeans, and I'm not very familiar with the current state of Eclipse. Netbeans has had C++11 support for quite a while now though, so I'm sure Eclipse likely does too.

Jamal

@Corbin I may try harder to switch to a fully-compatible C++11 compiler once I get more into that. I'm slowly trying to slip into Java...

Corbin

If you're on Windows, you're probably going to have some problems, unfortunately. clang currently has the best C++11 support, though GCC is quickly gaining and VS is actually doing pretty well keeping up. GCC is finicky on Windows though, clang has just recently become supported and depends on GCC, and VS is missing a few vital parts :/. You can't really fully win. (Although the last time I did C++11 on Windows was about 3 months ago -- might have improved since then)

Jamal

3:44 AM

>.<

Corbin

Slowly slip into Java? Is a class the motivation for that, or are you a masochist? :p

Jamal

It's a class. :-/ Anything to reduce the chances of bombing it.

Corbin

Ah :)

Jamal

I'm finally going to have a double-helping of programming next semester, but it's gonna be tough. I'll be new to (real) OO, as well as parallelism.

Corbin

At least both are very interesting :)

Captain Obvious

3:51 AM

0

Q: URL Conditional Javascript

I'd appreciate any help just refining this working code. It has a bit of a weird context, but basically it's for a gallery style site that has hundreds of pages, but needs new navigation buttons. Unfortunately there's no way to add these buttons without adding them for over 300+ pages manually, o...

javascript html css

0

Q: how do I refactor this producer consumer class to minimize what is exposed?

I don't like the service class below, specifically, the way it exposes the internals of the producer. While it would be possible to combine all three classes into one producer-consumer, I would rather that they stay separated. service: package net.bounceme.dur.client; import java.io.IOExcepti...

java oop design-patterns socket stream

Jamal

I'll be taking the latter with a professor I've had before (for computer architecture), and he's kinda tough.

Corbin

Ah... Concurrency and parallelism are hard to begin with, so that might be quite unpleasant :/. At least it's in a relatively high level language though with support for basically all the required tools out of the box (not that actually using the tools isn't the hard part though... lol).

Jamal

The syllabus doesn't even state what language will be used. At least it won't be assembly.

Can't be harder than Operator Systems.

Corbin

4:09 AM

I actually didn't mind assembler too much, but we were lucky enough to go the RISC route. x86 makes my head hurt.

Jamal

I like x86. :-) But I probably only say that because it was covered in my assembly class. Computer architecture class involved MIPS, but it wasn't actually taught (it wasn't an assembly class).

Corbin

Ah yeah. We're probably both just biased to what we learned haha. x86 is certainly the more practical one to learn.

Jamal

After receiving some brutal assembly reviews here, I probably should hold back from programming in it. Even when it doesn't seem quite that hard, it's still different than programming in a high-level language.

Corbin

4:34 AM

Hah. I think it's just a weird mental shift. I would never dare to post any of my assembly here. I don't even want to know how bad it is.

Phrancis

5:01 AM

Hey all

Captain Obvious

6:59 AM

0

Q: How to generate valid number of combinations of datacenter and its host id?

I have a list of datacenters, which are dc1, dc2 and dc3. And each datacenter has six ids as of now (can be 11 in each datacenter as well or uneven number for each datacenter). dc1 - h1, h2, h3, h4, h5, h6 dc2 - h1, h2, h3, h4, h5, h6 dc3 - h1, h2, h3, h4, h5, h6 Now I am trying to generate ...

java optimization performance algorithm

Phrancis

7:16 AM

Some dude azngunit81 just chewed my ass because he was only looking for eloquent review, even though he also tagged php sql.

Go back to SO man, seriously.

Dagg Nabbit

8:02 AM

^ looks like an XY problem

"my SQL looks too much like SQL, how can I fix it?"

Phrancis

8:14 AM

Right. Let me just rely on a heavily modified version of PHP instead to do all my SQL work.

Calling it "Eloquent" is adding insult to injury. Oh well, I tried.

Dagg Nabbit

8:32 AM

i never understood that approach myself... trying to write a bunch of functions to emulate SQL, when underneath it's generating SQL anyway. Abstract the SQL away where it's appropriate, and just let people write SQL where it's not. Don't try for some weird halfway thing. Just another thing for people to remeber.

If he had something specific in mind that "eloquent" would do for him, that's another story. But as it is, it has the same feel as those "how can I convert my JavaScript to jQuery" questions.

...which are about on par with those "what are some awesome features of X" questions that used to be popular on SO...

Captain Obvious

9:01 AM

0

Q: Getting TLE for spoj NGON (many polygons)

I am trying to solve NGON problem. I am using bottom up dynamic programming here. Recurrence function is: f(a,b) = f(a-1,b) + f(a-1,b-1)*ai +f(a-1,b-2)*ai*(ai-1)/2, a>0,b>0 f(a,0) = 1, f(0,b) = 0, ai being the points on ath side. I have used a O(n^2) algorithm. I can't think anything other a...

optimization algorithm

0

Q: Forcing SSL and WWW using .htaccess

I would like to know if this code in .htaccess for forcing SSL and WWW in URL is correct, because with another codes I usually get redirect loop, e.g. RewriteCond %{HTTPS} !=on and now it works like a charm (suspiciously). Also, is possible to write it better/simplier? # Force to SSL RewriteCond...

.htaccess https ssl

Captain Obvious

9:33 AM

0

Q: Improvements to nsiZipReader and nsIScriptableInputStream

Disclaimer: I'm trying to tag this with: firefox-addon, xpcom but I can't create tags yet. I wrote this code to list contents of an XPI file and then read the contents in it. I was thinking areas of improvment: I put the zr.open in the try because if the file does not exist it will throw exce...

javascript

0

Q: Promise.jsm demo of Promise.all and Promise.defer

Disclaimer: Needs firefox-addon tag I created this demo example for MDN documentation to show how to use Promise.all and Promise.defer in user created promise. I used lets because I thought if I didn't it would mess it up. People are recommending I avoid let because the standard is not there ye...

javascript

skiwi

10:05 AM

Monking

rolfl

Monking

skiwi

Waken up early by the kids? ;-)

rolfl

Actually, alarm. About to do an 8 hour drive

skiwi

:o What are you up to then?

1

Q: How to generate valid number of combinations of datacenter and its host id?

I have a list of datacenters, which are dc1, dc2 and dc3. And each datacenter has six ids as of now (can be 11 in each datacenter as well or uneven number for each datacenter). dc1 - h1, h2, h3, h4, h5, h6 dc2 - h1, h2, h3, h4, h5, h6 dc3 - h1, h2, h3, h4, h5, h6 Now I am trying to generate ...

java optimization performance algorithm

Does this title need improvement?

First thought on that question I had was: Do I need to close it?

(Without reading, just by title)

skiwi

10:31 AM

16

Q: Should I return a Collection or a Stream?

Suppose I have a method that returns a read-only view into a member list: class Team { private List<Player> players = new ArrayList<>(); // ... public List<Player> getPlayers() { return Collections.unmodifiableList(players); } } Further suppose that all the client...

java collections java-8 encapsulation streams-api

The Java 8 team at full force ^

@Donald.McLean We've got a new candidate besides pythonic! It's called Swift-y.

8

Q: Is this FizzBuzz Swift-y?

for (var i = 1; i <= 100; ++i) { var fizzBuzz = "" if i % 3 == 0 { fizzBuzz += "Fizz" } if i % 5 == 0 { fizzBuzz += "Buzz" } if fizzBuzz == "" { fizzBuzz += "\(i)" } println(fizzBuzz) } I don't really like comparing strings with ==, bu...

fizzbuzz swift

Iew, Swift looks ugly.

Switching over tuples is interesting though.

But then they make a weird design decision to not have switch statements fall through, like they always have been.

Perhaps I should take the challenge to write FizzBuzz in both the shortest and most readable (so no dirty unreadable hacks) in Java 8.

skiwi

11:04 AM

Lol... github.com/EnterpriseQualityCoding/FizzBuzzEnterpriseEdition

Captain Obvious

11:35 AM

0

Q: The FizzBuzz challenge in Java 8 written in a short, readable and interesting way

I decided to take on the FizzBuzz challenge with as twist that I would use Java 8 concepts to make it a bit modular, yet still let it be a short, readable and understandable program. This in contrary to some gem I found on the net: FizzBuzzEnterpriseEdition The problem description: Write a ...

java programming-challenge fizzbuzz java-8

skiwi

Ugh, 3 views in 10 minutes, this was a bad time to post a question.

Jeroen Vannevel

12:06 PM

I don't know why they made the Java 8 streams so.. awkward

Without knowing anything about it, how am I supposed to know what IntStream.rangeClosed(min, max).mapToObj(FizzBuzz::fizzBuzzify) could possibly mean

Such a contrast compared to LINQ

nhgrif

@skiwi You can make them fallthrough.

I think any time you come across a "weird design decision" like that in Swift, it'll probably turn out to be something that's a common developer mistake.

@200_success Probably... I didn't realize there was still an NDA since I'm an idiot and it basically only requires a Mac to get access to it. Can you delete the message?

skiwi

@JeroenVannevel I don't think it's too hard, but I may be biased

nhgrif

@rolfl What sort of new other bugs do you feel have been made possible? I think a lot of thought went into improving on what they already had in a way that made silly mistakes less likely--like the fact that switch statements only fallthrough with the fallthrough keyword.

skiwi

IntStream.rangeClosed = a closed range of ints as a stream, map to obj = map the integers to an object

Very good catch on the resi;t/;emgtj ? 0, I like it! No need for the (stupid) variable anymore. — skiwi 10 secs ago

nhgrif

@syb0rg Answering my Swift questions (which I shall be posting many of over the coming days as I teach myself the language) is definitely a good way to learn the language yourself. What you also might consider doing is implementing anything I do in Swift yourself in Objective-C and posting that as a question as a way of learning Objective-C.

Jeroen Vannevel

12:20 PM

I'm probably biased from LINQ as well but something like IntStream.range(min, max).execute(FizzBuzz::fizzBuzzify(value)); would make more sense

skiwi

Erm, I might have messed something up in that comment

finger-placement

@JeroenVannevel But I don't execute it, it has nothing to do with it here imho.

I start of by a IntStream, and I map them to a Stream<String>

Also a fair point there @ckhun203

I still have a new version coming up possibly today, but it requires me to write a little library for my needs

nhgrif

@SimonAndréForsberg If you are still interested in learning Objective-C... I'm intending to post several Swift questions as I teach myself Swift. Might be good to follow along posting the same question but for Objective-C. In many cases the difference will primarily be syntax... and both languages strongest features will be the Foundation library they're built upon.

Jeroen Vannevel

@skiwi Fair enough, that's why in LINQ it's called .Select() but I didn't want to just copy a LINQ statement ;)

Nobody

Monking @all

@DaggNabbit Okay, then I misunderstood it. On the basic types there is no difference because it is easily optimizable and on user defined types (in C++) the compiler must use the one you chose because it cannot reason about the sideeffects

skiwi

Monking @Nobody

Captain Obvious

12:38 PM

0

Q: Optimize parsing more and more… in C#

I have below C# code for parsing ... Do you think this is most optimize or I should use generic method or optimization required in these function itself? public static bool GetDBBool(object value) { var result = false; if (value != null && string.IsNullOrEmpty(value.ToString()) == false...