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Is there a “goto” statement in bash?
...nlike most of the methods described above).
#!/bin/bash
echo "Run this"
cat >/dev/null <<GOTO_1
echo "Don't run this"
GOTO_1
echo "Also run this"
cat >/dev/null <<GOTO_2
echo "Don't run this either"
GOTO_2
echo "Yet more code I want to run"
To put your script back to no...
Returning a boolean from a Bash function
...ted in the function.
Therefore, we don't have to EVER use 0 and 1 to indicate True and False. The fact that they do so is essentially trivial knowledge useful only for debugging code, interview questions, and blowing the minds of newbies.
The bash manual also says
otherwise the function’s r...
Best practices with STDIN in Ruby?
...e Ruby.
So, in Ruby, a simple no-bells implementation of the Unix command cat would be:
#!/usr/bin/env ruby
puts ARGF.read
ARGF is your friend when it comes to input; it is a virtual file that gets all input from named files or all from STDIN.
ARGF.each_with_index do |line, idx|
print ARGF....
How to inherit from a class in javascript?
... used with the new operator:
var subInstance = new Sub();
Function application or "constructor chaining":
function Super () {
this.member1 = 'superMember1';
this.member2 = 'superMember2';
}
function Sub() {
Super.apply(this, arguments);
this.member3 = 'subMember3';
}
This approach sh...
Naming returned columns in Pandas aggregate function? [duplicate]
...
Note that this syntax will be deprecated in future versions of pandas. Details are in the 0.20 changelog, which I summarized in my answer.
– joelostblom
May 10 '17 at 15:43
...
Maximum number of threads per process in Linux?
...esses with a shared address space on Linux) which you can view like this:
cat /proc/sys/kernel/threads-max
The default is the number of memory pages/4. You can increase this like:
echo 100000 > /proc/sys/kernel/threads-max
There is also a limit on the number of processes (and hence threads...
How to check if any flags of a flag combination are set?
...d :
using System;
[Flags] public enum Pet {
None = 0,
Dog = 1,
Cat = 2,
Bird = 4,
Rabbit = 8,
Other = 16
}
public class Example
{
public static void Main()
{
// Define three families: one without pets, one with dog + cat and one with a dog only
Pet[] petsInFam...
How to redirect output with subprocess in Python?
...feeling I should've been using subprocess instead since it's a library dedicated to this task, although since I'm doing this just for myself I'll be fine using os.system this time.
– catatemypythoncode
Feb 11 '11 at 2:53
...
Unable to Cast from Parent Class to Child Class
...ity. I did that so I didn't have to import the web reference into my application since it was in my helper library. This allowed me to convert the parent to my wrapper class. Thank you!
– BrianVPS
Nov 17 '17 at 1:30
...
Coloring white space in git-diff's output
...
Of course, you can also do git diff | cat -A | less -S if you're desperate, but in addition to the carriage returns, the cat will also display any colour highlighting escape codes literally.
– Paul Whittaker
Jul 16 '12 at 17...