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How to create a checkbox with a clickable label?
...c variables do you like?</legend>
<input type="checkbox" name="foo" value="bar" id="foo_bar">
<label for="foo_bar">Bar</label>
<input type="checkbox" name="foo" value="baz" id="foo_baz">
<label for="foo_baz">Baz</label>
</fieldset>
...
?: operator (the 'Elvis operator') in PHP
... left operand is truthy, and the right operand otherwise.
In pseudocode,
foo = bar ?: baz;
roughly resolves to
foo = bar ? bar : baz;
or
if (bar) {
foo = bar;
} else {
foo = baz;
}
with the difference that bar will only be evaluated once.
You can also use this to do a "self-check"...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
...ore matches by performing the assignment as the loop condition.
var re = /foo_(\d+)/g,
str = "text foo_123 more text foo_456 foo_789 end text",
match,
results = [];
while (match = re.exec(str))
results.push(+match[1]);
DEMO: http://jsfiddle.net/pPW8Y/
If you don't like the pla...
Passing just a type as a parameter in C#
...ic T GetColumnValue<T>(this string columnName){...} then you can say foo.GetColumnValues<string>(dm.mainColumn)
– Joshua G
Jun 4 '14 at 15:56
...
When should the volatile keyword be used in C#?
...fully constructed object:
Thread 1 asks if a variable is null.
//if(this.foo == null)
Thread 1 determines the variable is null, so enters a lock.
//lock(this.bar)
Thread 1 asks AGAIN if the variable is null.
//if(this.foo == null)
Thread 1 still determines the variable is null, so it calls a const...
Reverse of JSON.stringify?
I'm stringyfing an object like {'foo': 'bar'}
8 Answers
8
...
`static` keyword inside function?
...n their state. So be careful when writing OOP code.
Consider this:
class Foo
{
public function call()
{
static $test = 0;
$test++;
echo $test . PHP_EOL;
}
}
$a = new Foo();
$a->call(); // 1
$a->call(); // 2
$a->call(); // 3
$b = new Foo();
$b->c...
Object.watch() for all browsers?
... syntax from the Firefox way of adding observers. Instead of :
var obj = {foo:'bar'};
obj.watch('foo', fooChanged);
You do:
var obj = {foo:'bar'};
var watcher = createWatcher(obj);
watcher.watch('foo', fooChanged);
Not as sweet, but as an observer you are notified immediately.
...
How do I assert an Iterable contains elements with a certain property?
...:
assertThat( myClass.getMyItems(), contains(
hasProperty("name", is("foo")),
hasProperty("name", is("bar"))
));
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理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...he lines of: 如果不用with语句，代码如下：
file = open("/tmp/foo.txt")
data = file.read()
file.close()
There are two annoying things here. First, you end up forgetting to close the file handler. The second is how to handle exceptions that may occur once the file handler has been obt...