大约有 6,261 项符合查询结果（耗时：0.0226秒） [XML]
Is it possible to delete an object's property in PHP?
...object attributes.
Example:
$a = new stdClass();
$a->new_property = 'foo';
var_export($a); // -> stdClass::__set_state(array('new_property' => 'foo'))
unset($a->new_property);
var_export($a); // -> stdClass::__set_state(array())
...
Multiple arguments vs. options object
...s.
Consider the following terrible code:
function main() {
const x = foo({
param1: "something",
param2: "something else",
param3: "more variables"
});
return x;
}
function foo(params) {
params.param1 = "Something new";
bar(params);
return params;
}...
How is pattern matching in Scala implemented at the bytecode level?
...see below about custom extractors
case "hello" // equality check
case _ : Foo // instance of check
case x => // assignment to a fresh variable
case _ => // do nothing, this is the tail else on the if/else
There's much more that you can do with patterns like or patterns and combinations like...
Get path from open file in Python
...
If you create a file using open('foo.txt', 'w') and then do f.name, it only provides you with the output foo.txt
– searchengine27
Jun 16 '15 at 17:04
...
What does it mean when a CSS rule is grayed out in Chrome's element inspector?
...nt containing the text "Hello, world!"
div {
margin: 0;
}
div#foo {
margin-top: 10px;
}
<div id="foo">Hello, world!</div>
share
|
improve this answer
|...
Python - Passing a function into another function
...ents to be passed to `func`.
Example
-------
>>> def foo(a:Union[float, int], b:Union[float, int]):
... '''The function to pass'''
... print(a+b)
>>> looper(foo, 3, 2, b=4)
6
6
6
"""
for i in range(n):
fn(*args, **kw...
What is the Java ?: operator called and what does it do?
...y notable in final fields, but useful elsewhere, too.
e.g.:
public class Foo {
final double value;
public Foo(boolean positive, double value) {
this.value = positive ? value : -value;
}
}
Without that operator - by whatever name - you would have to make the field non-fina...
sqlite database default time value 'now'
...ull default (strftime('%s','now'))
);
insert into example(data) values
('foo')
,('bar')
;
select
id
,data
,created_at as epoch
,datetime(created_at, 'unixepoch') as utc
,datetime(created_at, 'unixepoch', 'localtime') as localtime
from example
order by id
;
id|data|epoch |utc ...
How to split a long regular expression into multiple lines in JavaScript?
...may write smaller regexes and concatenate them.
Let's split this regex
/^foo(.*)\bar$/
We will use a function to make things more beautiful later
function multilineRegExp(regs, options) {
return new RegExp(regs.map(
function(reg){ return reg.source; }
).join(''), options);
}
A...
What's the difference between an id and a class?
...at are all alike. For instance, common id elements are things like header, footer, sidebar. Common class elements are things like highlight or external-link.
It's a good idea to read up on the cascade and understand the precedence assigned to various selectors: http://www.w3.org/TR/CSS2/cascade.htm...