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Determine if a function exists in bash
...is a function, built-in function, external command, or just not defined. Example:
$ LC_ALL=C type foo
bash: type: foo: not found
$ LC_ALL=C type ls
ls is aliased to `ls --color=auto'
$ which type
$ LC_ALL=C type type
type is a shell builtin
$ LC_ALL=C type -t rvm
function
$ if [ -n "$(LC_ALL=C...
GitHub clone from pull request?
...obal alias.pro '!f() { git fetch -fu ${2:-origin} refs/pull/$1/head:pr/$1 && git checkout pr/$1; }; f'
Now you can checkout any PR by running git pr <pr_number>, or git pr <pr_number> <remote> if your github remote is not named origin.
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How to round up a number to nearest 10?
How can we round off a number to the nearest 10 in php?
16 Answers
16
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How do I check if the Java JDK is installed on Mac?
...u can check if java is installed by the next way:
/usr/libexec/java_home &> /dev/null && echo "installed" || echo "not installed"
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Download File to server from URL
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Since PHP 5.1.0, file_put_contents() supports writing piece-by-piece by passing a stream-handle as the $data parameter:
file_put_contents("Tmpfile.zip", fopen("http://someurl/file.zip", 'r'));
From the manual:
If data [that ...
Where can I learn jQuery? Is it worth it?
...bout web development on w3schools.com . It's hit or miss, I know, but the PHP and CSS sections specifically have proven very useful for reference.
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How to check for null in Twig?
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In addition, unlike the PHP isset() function, is defined will return true if a variable is defined and it's value is null.
– Pavel Petrov
Sep 19 '17 at 7:59
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check if jquery has been loaded, then load it if false
...Query
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include_once equivalent for js. Ref: https://raw.github.com/kvz/phpjs/master/functions/language/include_once.js
function include_once (filename) {
// http://kevin.vanzonneveld.net
// + original by: Legaev Andrey
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.n...
How to set Python's default version to 3.x on OS X?
...h_profile and/or your~/.zsh_profile with a line like:
[ -e ~/.profile ] && . ~/.profile
This way, your alias will work across shells.
With this, python command now invokes python3. If you want to invoke the "original" python (that refers to python2) on occasion, you can use command pyth...
What is the (function() { } )() construct in JavaScript?
...Also, parsing code doesn't automatically mean that it's executed, if for example the IIFE is inside a function then it won't be executed until the function is called.
Update
Since this is a pretty popular topic, it's worth mentioning that IIFE's can also be written with ES6's arrow function (like ...