> Make sure you include your code in your question
This site is for code reviews, which are hard to do when the code is behind a link somewhere out there on the Internet. If you want a code review, you must post the relevant snippets of code in your question. It is fine to post a "see more" link (though, do be careful — very few reviewers will be willing to click through and read thousands of lines of your code), but the most important parts of the code must be placed directly in the question.
I am building a database for a hypothetical university. This is my SQL definition, with generated data added for my future use, such as demonstrating queries:
Create Table Semesters (
Semester varchar(6) Primary Key Not Null,
);
Insert Into UniversityDatabase.dbo.Semesters
Values ('Spring'...
@Phrancis I think that if we would change the wording of the guidelines a bit then we could prevent off-topic questions... But to test that we would first need to know if the OP actually read the guidelines before posting his off-topic question
@rolfl I don't know yet, all I know is that I'll be working (hopefully - if I get the job) with Linux servers in the future, and I've had some experience with them half a year ago
For automating continious integration builds I can live with Bash if it's mostly running commands, but once you start writing if statements, for loops or even more dangerous constructs then I get scared of Bash
@skiwi - in that case, do both. Learn all about shell scripting - bash is a good start. Then, also learn one of the management tools. There are 4.5 of them.
You will need to learn bash for anything you do related to Linux, so suck it up, be "a man", and make it happen.
People who program Python or Ruby would tell you that they are not scripting languages.
3
I tried to explain the "domain" of scripting languages to some IBM folk the other day, and tried to explain why it's different from something like Python.
Consider you want to run a python program that computes pi .... right?
@skiwi Other than making things easier, the shebang makes your script's able to be called just like normal programs. Say you have foo and bar in your PATH, and say you wrote those in Python or Bash or something but you're not sure which. The shebang lets you call them just by naming them, regardless of which scripting language you used.or whatever else.
@skiwi - if you have a job you need to do, and there's a tool that already exists that can do most of it, and another tool that can do most of the rest of it, then all you need to do is "wrap" and "sequence" the two programs in to one script.
(wood cut).
You could do that via python, or ruby, but, it is HARD to do that correctly.
For example, I have to ensure that a system is correctly installed with "ansible" (an automation tool).
The process for doing it is to install python, then add a new repository to ubuntu, and then install ansible from that repository.
If stuff gets a bit more complicated than that, then it seems reasonable to write some Python/Ruby script that takes it as input and outputs the result
it seems reasonable, yes, but, you would be amazed at how, if you are judicious about how you create shell scripts, that you can get a better, faster solution.
So, if you are calculating something mathematical, use a mathematical language... but, if you are just running things, and organizing where the output goes, and checking to make sure things worked, then use bash.
Now, you may be surprised at a bunch of things that are unexpected.... like....
> ldd prints the shared libraries required by each program or shared library specified on the command line.
if you compile a program and it uses shared libraries, you can see what libraries they are by running ldd.
@skiwi If your script is 99% scripting, but then you all of a sudden need something that Python can do you can call it with the -c switch. E.g. x=2 y=3 r=$(python -c "from math import *; print sqrt($x*$x+$y*$y)")
Bash has a dictionary based looping system. Notice that seq 1 100 just is a convenient program which generates an appropriate number of output arguments (100 arguments) in this case.
You could also write your own seq in Bash if you wanted. Use a while loop and the $((...)) syntax to perform arithmetic.
Yeah. @skiwi - a more complicated example, is the following "program" I recently wrote.
I needed to create a custom version of an Ubuntu CDRom that installs stuff that is not normally installed.
I cannot use some of the other "network based" systems out there.
There are existing tools that can: - get an ubuntu image from the internet - copy the contents of that image in to a different directory - change those contents - re-build the image with the altered contents
In there somewhere is pulling a complete git repository of stuff to "add".
So, should I just write a hundred lines of bash that does it all in sequence, or should I write a python program?
The only uniquely error prone thing I found about Bash is the following ``` example=foo echo "You entered $exmple" ``` In most other languages including C Shell, reading from the nonexistent $exmple would be an error. But in Bash it is assumed you wanted to create a new variable with an empty string.
I like csh for a bunch of things (tcsh actually), and I prefer many things over bash, but I got stuck once on a multi-pipe exit code that only bash could solve.
Anyway, @skiwi - despite what you may think, sure you cna do "everything" in python, but, if you use linux, you will need to learn bash anyway.
If your script is called foo then you call it with args a1, a2 and a3 like this `bash foo a1 a2 a3` Or add a shebang line so that you can write `foo a1 a2 a3`
This question could be suitable for Code Review, as long as (a) your code works as intended, (b) your code is real code, rather than example code, and (c) your code is included in the body of the question. If you wish for a peer review to improve all aspects of your code, please post it on Code Review. — Phrancis33 secs ago
I have written this piece of code that implements the double factorial in Python both iteratively and recursively; the code works without problems, but I'm interested in improving my overall programming style. Here's the code:
def semif_r(n): #recursive implementation
if n ==...
@Hosch250 I don't know if I will see anything "really serious", but seeing some things that could be improved. I'll be posting a review at some point fairly soon, I'm having to make a few changes to your script so I can run it (I don't have CREATE DATABASE permissions so I'm moving it down to schema level)
I'm learning how to write tests in Angular (these are my first tests in general). There are a lot of tutorials out there but each one of them has a different approach. I'm a bit confused if I'm doing things the right way.
I made a simple directive for testing purposes and I've called it tooltip ...
I don't think you will find anything really serious either, BTW.
BTW, are you on your work computer or you personal computer? I would think you could use Create Database either through SQL or through the GUI context menu if you were on your personal computer.
BTW, Bing updated their algorithm. Searching 'connect' used to pull up McGraw-Hill's Connect site, but it doesn't anymore.
@Hosch250 I'm on home computer, running on someone else's instance that they let me use a database catalog on. On my work PC (which I don't have right now) I could just run it on localhost though
This question would not be well received on Code Review in its current state. The author would want to include a plain English explanation of what the code does, and that it does it correctly. Also, a title that says something about the code in a few words, as the desire to improve code is implied on all questions there. — Phrancis31 secs ago
I am having trouble understand what my professor wants. He provide me this code and ask us to complete //TODO portion. Which I do, but the code has errors and does not compile. Then I email him and he said I need to import a library and create another class. But I believe half the node class is i...
I propose the following improvements (see below for some explaination):
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class Codigo extends Codificador {
@Override
void codifica(String[] args) {
File file...
So I have a list of lists of 4 integers, each representing the length of one side of a tetragon in clockwise order (so each number is the length of the side of the right-hand-adjacent-side of the previous one). Integers can be negative or positive or 0.
My idea is that if any of the sides are l...
This may seem a newb question but how do i get to get the .circumfrance question. Thanks.
import java.util.*;
import javafx.scene.shape.Circle;
public class Checking {
/**
* @param args
*/
static ArrayList<Character> rowsandColums = new ArrayList<Character>();
static Ci...
After seeing Pretty print dice faces from multiple rolls of multi-sided dices,
I decided to make an infinite ASCII dice generator.
There was one requirement, it to follow a normal dice face.
And so I decided on making two classes, the Dice and Rings.
Dice outputs the ASCII dice, holds the rings,...
I am building a database for a hypothetical university. This is my SQL definition, with generated data added for my future use, such as demonstrating queries:
Create Table Semesters (
Semester varchar(6) Primary Key Not Null,
);
Insert Into UniversityDatabase.dbo.Semesters
Values ('Spring'...
I have written this piece of code that implements the double factorial in Python both iteratively and recursively; the code works without problems, but I'm interested in improving my overall programming style. Here's the code:
def semif_r(n): #recursive implementation
if n ==...
I propose the following improvements (see below for some explaination):
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class Codigo extends Codificador {
@Override
void codifica(String[] args) {
File file...
So I have a list of lists of 4 integers, each representing the length of one side of a tetragon in clockwise order (so each number is the length of the side of the right-hand-adjacent-side of the previous one). Integers can be negative or positive or 0.
My idea is that if any of the sides are l...
This may seem a newb question but how do i get to get the .circumfrance question. Thanks.
import java.util.*;
import javafx.scene.shape.Circle;
public class Checking {
/**
* @param args
*/
static ArrayList<Character> rowsandColums = new ArrayList<Character>();
static Ci...
