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Assign same value to multiple variables at once?
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@Eoin: In doing $var_a = $var_b = ... = new Class();, all the variables will reference the same instance of Class.
– Tim Cooper
Jun 21 '19 at 19:34
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What does __FILE__ mean in Ruby?
I see this all the time in Ruby:
4 Answers
4
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一个科技公司只是碰巧卖起了披萨？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...擎。无论达美乐将来想去卖汉堡还是卖卷饼，貌似都不成问题。
善用社交媒体进行病毒传播
达美乐不仅用科技手段在提升用户订餐体验上受益匪浅，更在消费最活跃的社交媒体上给自己铺了一条金光大道：它经常在社交媒体...
MySQL ON DUPLICATE KEY - last insert id?
...le (a) VALUES (0)
ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id), a=1
Is all here: http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE
inserts a row, the LAST_INSERT_ID() function returns the
AUTO_INCREMENT value. If t...
How do you get a timestamp in JavaScript?
...nd it returns the timestamp (without any alteration).
Details:
On almost all current browsers you can use Date.now() to get the UTC timestamp in milliseconds; a notable exception to this is IE8 and earlier (see compatibility table).
You can easily make a shim for this, though:
if (!Date.now) {
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How can I check a C# variable is an empty string “” or null? [duplicate]
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@Lion Liu: Actually I think PHP has exactly as much to offer. See: php.net/manual/en/function.empty.php
– Milan
Feb 2 '16 at 20:09
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Perform .join on value in array of objects
...Array.prototype.map is what you're looking for if you want to code functionally.
[
{name: "Joe", age: 22},
{name: "Kevin", age: 24},
{name: "Peter", age: 21}
].map(function(elem){
return elem.name;
}).join(",");
In modern JavaScript:
[
{name: "Joe", age: 22},
{name: "Kevin", age: 2...
PHP regular expressions: No ending delimiter '^' found in
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PHP regex strings need delimiters. Try:
$numpattern="/^([0-9]+)$/";
Also, note that you have a lower case o, not a zero. In addition, if you're just validating, you don't need the capturing group, and can simplify the rege...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
...以返回怎么样的结果。
但这时很多同学往往会提出一个问题："那既然是我自己实现一个假的依赖类"，那和那些市面上的Mock框架有什么关系啊？
这个其实是这样的，这些个Mock框架可以帮助你比较方便、比较轻松地实现这些个...
Illegal mix of collations MySQL Error
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@Ben: It was initially developed by a Swedish company... That is the reason behind the annoying latin1_swedish_ci initial setting.. :(
– Vajk Hermecz
Sep 29 '14 at 7:45
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