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Why is string concatenation faster than array join?

...ring concatenation. Beginning with version 1.0, the array technique is actually slower than using the plus operator in all cases. Other browsers have also optimized string concatenation, so Safari, Opera, Chrome, and Internet Explorer 8 also show better performance using the plus operator. Internet ...
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Node.js / Express.js - How does app.router work?

...use is app.use() . When the middleware is being executed, it will either call the next middleware by using next() or make it so no more middleware get called. That means that the order in which I place my middleware calls is important, because some middleware depends on other middleware, and some...
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Creating a daemon in Linux

...where it was started + a newline. Daemons work in the background and (usually...) don't belong to a TTY that's why you can't use stdout/stderr in the way you probably want. Usually a syslog daemon (syslogd) is used for logging messages to files (debug, error,...). Besides that, there are a few re...
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Does every web request send the browser cookies?

...RL requested is within the same domain and path defined in the cookie (and all of the other restrictions -- secure, httponly, not expired, etc) hold, then the cookie will be sent for every request. share | ...
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CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...|grep squid 3.2 如果未安装,则使用yum 方式安装 # yum -y install squid 3.3 设置开机自启动 # chkconfig --level 35 squid on //在3、5级别上自动运行squid服务 四、squid服务器的配置文件说明 squid 的主配置文件是 /etc/squid/squid.conf,...
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Support for “border-radius” in IE

...es! When IE9 is released in Jan 2011. Let's say you want an even 15px on all four sides: .myclass { border-style: solid; border-width: 2px; -moz-border-radius: 15px; -webkit-border-radius: 15px; border-radius: 15px; } IE9 will use the default border-radius, so just make sure you include th...
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How to get nth jQuery element

...epends on the desired behavior. $('select').find('option').eq(n) will basically ignore the grouping, and get all options as a whole. If you want it per group, something like this is necessary: $('select').find('optgroup').each(function() { $(this).find('option').eq(n)...; }) – ...
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“Conversion to Dalvik format failed with error 1” on external JAR

... Go to Project » Properties » Java Build Path » Libraries and remove all except the "Android X.Y" (in my case Android 1.5). click OK. Go to Project » Clean » Clean projects selected below » select your project and click OK. That should work. It is also possible that you have a JAR file loc...
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Converting Select results into Insert script - SQL Server [closed]

...ore money data. Those data type can store more decimal places than are normally displayed or in the scripts generated by SSMS Toolpack – bernd_k Dec 26 '10 at 18:12 13 ...
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How can I perform a reverse string search in Excel without using VBA?

...eplaced | (that was the final space) Right(A1,LEN(A1) - ... )) – Returns all characters after that | EDIT: to account for the case where the source text contains no spaces, add the following to the beginning of the formula: =IF(ISERROR(FIND(" ",A1)),A1, ... ) making the entire formula now: =I...