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Is there a function to make a copy of a PHP array to another?
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In PHP arrays are assigned by copy, while objects are assigned by reference. This means that:
$a = array();
$b = $a;
$b['foo'] = 42;
var_dump($a);
Will yield:
array(0) {
}
Whereas:
$a = new StdClass();
$b = $a;
$b->foo = 42;
var_dump($a);
Y...
Easiest way to toggle 2 classes in jQuery
If I have class .A and class .B and want to switch in between on button click, what's a nice solution for that in jQuery? I still don't understand how toggleClass() works.
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30条爆笑的程序员梗 PHP是最好的语言 - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
...要说服他们，PHP语言是最好的语言。
4.睡觉
我是一个苦b的程序员，今晚加班到快通宵了，困得快睁不开眼了，女上司很关心，问我要不要吃宵夜。
我没好气地说，宵夜就算了，能让我睡一觉就行了。
女上司红着脸说了句讨...
What is the most effective way for float and double comparison?
What would be the most efficient way to compare two double or two float values?
31 Answers
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What are the differences between double-dot “..” and triple-dot “…” in Git commit ranges?
... it's in the man git-rev-parse documentation:
To exclude commits reachable from a commit, a prefix ^ notation is used. E.g. ^r1 r2 means commits reachable from r2 but exclude the ones reachable from r1.
This set operation appears so often
that there is a shorthand for it. When
you have ...
Is there a standardized method to swap two variables in Python?
In Python, I've seen two variable values swapped using this syntax:
7 Answers
7
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How do you compare two version Strings in Java?
Is there a standard idiom for comparing version numbers? I can't just use a straight String compareTo because I don't know yet what the maximum number of point releases there will be. I need to compare the versions and have the following hold true:
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When do I use a dot, arrow, or double colon to refer to members of a class in C++?
... C++, it is at first very confusing that C++ has three ways to refer to members of a class: a::b , a.b , and a->b . When do I use which one of these operators?
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Python element-wise tuple operations like sum
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import operator
tuple(map(operator.add, a, b))
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Bold words in a string of strings.xml in Android
I have a long text in one of the strings at strings.xml. I want to make bold and change the color of some words in that text.
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