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How do I see the extensions loaded by PHP?
...oaded function, see documentation here
php -r "var_dump(extension_loaded('json'));"
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程序员保值的4个秘密 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...应用场景、是否与用户的行为特点吻合、是否贴合用户的使用习惯,那恭喜你,你超越了90%的程序员——大部分程序员是按产品经理和UI设计师的要求来实现产品。
创新是人类发展的源泉,是社会进步的动力,同样也是产品的...
How can I generate Unix timestamps?
...to add a similar feature to my hobby site. curl -L -H "Accept: application/json" unixtimesta.mp will give you {"datetime":"Thu, 19 Jul 2018 12:01:21 GMT","timestamp":1532001681}
– Craig Anderson
Jul 19 '18 at 12:01
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C++静态和多态,亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...出的是Derived::foo(),也从一个侧面证明了:在继承链中,使用最"新"的虚函数版本。
至此,这个问题已经解释清楚,再次记住结论:静态成员函数,不能同时也是虚函数。
2、重载(overload)并非真正的多态,其本质是静态行...
selecting unique values from a column
...ing like this in case you also want to output products details per date as JSON.
SELECT `date`,
CONCAT('{',GROUP_CONCAT('{\"id\": \"',`product_id`,'\",\"name\": \"',`product_name`,'\"}'),'}') as `productsJSON`
FROM `buy` group by `date`
order by `date` DESC
product_id product_name date
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Submit HTML form on self page
... why XML is still important today - you can take any model you want, be it JSON, text, csv, write a simple transformer from that format to XML, write a DTD for that XML, and bam, you skip needing to write your own validator, XML already did that!
– Dmitry
Jun 1...
How to fix bower ECMDERR
...
My bower.json first looked like this:
{
"name": "HelloIonic",
"private": "true",
"devDependencies": {
"ionic": "driftyco/ionic-bower#1.3.1",
"ion-datetime-picker": "katemihalikova/ionic-datetime-picker#0.4.0",
"...
Use of 'prototype' vs. 'this' in JavaScript?
...t if you're serializing and de-serializing your Javascript objects to/from JSON. Methods defined on an object's prototype are not serialized when you serialize the object, which can be convenient when for example you want to serialize just the data portions of an object, but not it's methods:
var A...
你不得不知道的6个用好大数据的秘诀 - 资讯 - 清泛网 - 专注C/C++及内核技术
...o;往往并不能代表整个‘森林’。”Luzzi说,“如果使用了错误的数据,得出的结论往往也是错的。”
数据选择上的错误会影响人们解决问题的过程,也会影响人们如何看待这些数据和结果。错误的数据选择可能影响到公...
$(this).serialize() — How to add a value?
...serialize() + "&" + userData + "&userId=" + userId,
dataType: 'json',
success: function (response) {
//do something
}
});
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