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?: operator (the 'Elvis operator') in PHP
...will leave foo unchanged.
Some more examples:
<?php
var_dump(5 ?: 0); // 5
var_dump(false ?: 0); // 0
var_dump(null ?: 'foo'); // 'foo'
var_dump(true ?: 123); // true
var_dump('rock' ?: 'roll'); // 'rock'
?>
By the way, it's called the Elvis operator.
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How to shorten my conditional statements
...t in other's code.
Instead of checking if the result of indexOf is >= 0, there is a nice little shortcut:
if ( ~[1, 2, 3, 4].indexOf(test.type) ) {
// Do something
}
Here is the fiddle: http://jsfiddle.net/HYJvK/
How does this work? If an item is found in the array, indexOf returns its ...
Generate random string/characters in JavaScript
...aracter string composed of characters picked randomly from the set [a-zA-Z0-9] .
77 Answers
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Best way to find the intersection of multiple sets?
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edited Dec 11 '19 at 13:08
Jean-François Fabre♦
122k1111 gold badges9797 silver badges156156 bronze badges
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Why use Ruby's attr_accessor, attr_reader and attr_writer?
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750
You may use the different accessors to communicate your intent to someone reading your code, and...
setTimeout / clearTimeout problems
I try to make a page to go to the startpage after eg. 10sec of inactivity (user not clicking anywhere). I use jQuery for the rest but the set/clear in my test function are pure javascript.
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How Pony (ORM) does its tricks?
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210
Pony ORM author is here.
Pony translates Python generator into SQL query in three steps:
Deco...
Is it possible to use raw SQL within a Spring Repository
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– Jacob van Lingen
Jan 6 '17 at 9:20
nativeQuery = true saved me from IllegalArgumentException
–...
What's the simplest way to subtract a month from a date in Python?
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20 Answers
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How do I decode a string with escaped unicode?
...ouble searching for it. How can I decode a string with unicode from http\u00253A\u00252F\u00252Fexample.com to http://example.com with JavaScript? I tried unescape , decodeURI , and decodeURIComponent so I guess the only thing left is string replace.
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