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What is Node.js? [closed]

I don't fully get what Node.js is all about. Maybe it's because I am mainly a web based business application developer. What is it and what is the use of it? ...
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In PHP, what is a closure and why does it use the “use” identifier?

... This is how PHP expresses a closure. This is not evil at all and in fact it is quite powerful and useful. Basically what this means is that you are allowing the anonymous function to "capture" local variables (in this case, $tax and a reference to $total) outside of it scope and...
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PHP memory profiling

...r example, to see how much memory my data is using, and/or which function calls are allocating the most memory. 4 Answers ...
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Enable Vim Syntax Highlighting By Default

...your $HOME as .vimrc. It switches on a lot of basic stuff for you automatically (syntax, search highlighting, backup etc). You can then tweak it based on your needs. – oyenamit Jun 30 '12 at 14:51 ...
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社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...果能把账号和IP的访问策略控制好了,基本可以解决这个问题了。当然对方网站也会有运维会调整策略,说到底这是一个战争,躲在电脑屏幕后的敌我双方,爬虫必须要能感知到对方的反监控策略进行了调整,通知管理员及时处...
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Convert number to month name in PHP

... The recommended way to do this: Nowadays, you should really be using DateTime objects for any date/time math. This requires you to have a PHP version >= 5.2. As shown in Glavić's answer, you can use the following: $monthNum = 3; $dateObj = DateTime::createFromFormat('!m',...
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how to stop browser back button using javascript

... There are numerous reasons why disabling the back button will not really work. Your best bet is to warn the user: window.onbeforeunload = function() { return "Your work will be lost."; }; This page does list a number of ways you could try to disable the back button, but none are guaranteed...
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What does PHP keyword 'var' do?

...tants states that var must not be used, and visibility must be declared on all properties. – Charles Wood Nov 11 '19 at 14:23 ...
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GCM with PHP (Google Cloud Messaging)

... curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($post)); // Actually send the request $result = curl_exec($ch); // Handle errors if (curl_errno($ch)) { echo 'GCM error: ' . curl_error($ch); } // Close curl handle curl_close($ch); // Debug GCM res...
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How does the SQL injection from the “Bobby Tables” XKCD comic work?

...t'); DROP TABLE STUDENTS; --) and the last name textbox LName.Text (let's call it Derper) are concatenated with the rest of the query, the result is now actually two queries separated by the statement terminator (semicolon). The second query has been injected into the first. When the code executes...