We're considering adding a system name which will allow access to the last returned result in APL's REPL. This is basically equivalent to TI-BASIC's Ans. What would be a good name for it?
APL system names begin with ⎕ and are case insensitive, but usually written in uppercase. E.g. ⎕ANS or ⎕THAT.
hmm, if I have a regex group like this ([("]), which matches an open parentheses or a double quote, how can I have a 2nd matching group that matches a closed paren if the first group is an open paren, or another double quote if the first group is a double quote?
@SIGSEGV The RIDE interface for Dyalog APL allows you to reassign your keys on the fly. You open the preferences (this displays a keyboard), then you can just click on a symbol and replace it.
You can't parse [X]HTML with regex. Because HTML can't be parsed by regex. Regex is not a tool that can be used to correctly parse HTML. As I have answered in HTML-and-regex questions here so many times before, the use of regex will not allow you to consume HTML. Regular expressions are a tool th...
@ASCII-only the function looks like this (p a b), where p is the function name, a is the first argument, and b is the second. There will never be more than 2 arguments, but there may only be one. The arguments can either be a number literal 0123, a string literal "foobar", a variable name foo_bar or another function (p a)
if you parse function (p (p (a "b")) (p (a "b"))), it finds the function name p, then the 2 args (p (a \"b\")) and then parses the args into their own json objects, which are contained within an arg array of the parent object
so that function would become something like {"func": "p", "args": [{"func": "p", "args": [{"func": "a", "args": ["b"]}]},{"func": "p", "args": [{"func": "a", "args": ["b"]}]}]}
Appending Numbers code-golf string
A fairly simple challenge: You will receive two inputs, a string and a number.
If the string does not end in a number (ie, it does not match the regex \d$), just append the number to the end of the string.
If the string does end in a number (ie, it matches th...
The xorspace of a set of integers is the set of all integers that can be obtained by combining the starting integers with the usual bitwise xor operator (^). For example, the xorspace of (8, 4) is (0, 4, 8, 12): 0 is 4^4, 12 is 4^8, and no other numbers can be reached.
Your goal is to write the ...
Challenge
Decode an RS232 signal and output the message as ascii.
The signal is provided to you in the following format...
-----------_---___-_----_----_--_-----___--_--_-------__--__--_---------------------
...which decodes as "Golf".
The protocol is RS232, specifically: LSB first, 8 data ...
I've never answered a fastest code challenge, or challenges which are about efficiency because they require you to score your program using Big O Notation.
Now, I've seen a lot of these questions and still have no real clue what Big O Notation is and how to write a program accordingly.
So:
W...
You end up having a lot of very long, boring-looking conditionals in your code:
if flag == 1:
while have != needed:
if type == 7:
These can be transformed into their much more lovable <3 conditionals counterparts:
if abs(flag - 1) + 2 <3:
while 3 - abs(have - needed) <3:
if 2 + abs(type...
Collatz Bearings
Everyone knows the collatz conjecture. It is that this function:
when repeatedly applied on a positive non-zero integer will reach one.
There are many ways to visualise this. Inspired by this post, with the original source of this method here, this is how we will do it:
Sta...
Appending Numbers code-golf string
A fairly simple challenge: You will receive two inputs, a string and a number.
If the string does not end in a number (ie, it does not match the regex \d$), just append the number to the end of the string.
If the string does end in a number (ie, it matches th...
Challenge
Decode an RS232 signal and output the message as ascii.
The signal is provided to you in the following format...
-----------_---___-_----_----_--_-----___--_--_-------__--__--_---------------------
...which decodes as "Golf".
The protocol is RS232, specifically: LSB first, 8 data ...
I've never answered a fastest code challenge, or challenges which are about efficiency because they require you to score your program using Big O Notation.
Now, I've seen a lot of these questions and still have no real clue what Big O Notation is and how to write a program accordingly.
So:
W...
You end up having a lot of very long, boring-looking conditionals in your code:
if flag == 1:
while have != needed:
if type == 7:
These can be transformed into their much more lovable <3 conditionals counterparts:
if abs(flag - 1) + 2 <3:
while 3 - abs(have - needed) <3:
if 2 + abs(type...
