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How to debug an apache virtual host configuration?
...t your syntax is correct (same as apachectl configtest suggested by yojimbo87).
You'll also know where each vhost is declared. It can be handy if your config files are a mess. ;)
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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...s the stack size. This can be useful if you're getting stack overflows (Performance of Array.push vs Array.unshift) which is what happens when the size of the array exceeds the size of the stack, and it has to be re-created. So there can actually, depending on the use case, be a performance increase...
How to concatenate properties from multiple JavaScript objects
...
This is one of the best I could say. Since E6 is now mostly used, Object.assign is the best answer.
– Vimalraj Selvam
Nov 22 '16 at 10:53
6
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How to use sed to replace only the first occurrence in a file?
...ion to the POSIX specification for sed that allows the following 2-address form: 0,/re/ (re represents an arbitrary regular expression here).
0,/re/ allows the regex to match on the very first line also. In other words: such an address will create a range from the 1st line up to and including the li...
Hex transparency in colors [duplicate]
.... E.g. for 50% white you'd use #80FFFFFF.
100% — FF
95% — F2
90% — E6
85% — D9
80% — CC
75% — BF
70% — B3
65% — A6
60% — 99
55% — 8C
50% — 80
45% — 73
40% — 66
35% — 59
30% — 4D
25% — 40
20% — 33
15% — 26
10% — 1A
5% — 0D
0% — 00
(source)
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What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?
... for Statement
A for class of statements should have
the following form:
for (initialization; condition; update) {
statements
}
for (variable in object) {
if (filter) {
statements
}
}
The first form should be used with
arrays and with loops of a
predeterminab...
iTunes音乐搜索 · App Inventor 2 中文网
...不能直接出现中文和空格，
周杰伦 得先转换成 %E5%91%A8%E6%9D%B0%E4%BC%A6 这样的形式才能发出去。
UriEncode 就是干这个的——少了它，搜英文歌手名（Jay Chou 中间有空格）
和搜中文歌手名都会失败。
Web客户端1.执行GET请求() 是真正...
How do sessions work in Express.js with Node.js?
...default held in memory, although that could be altered to whatever storage form implements the appropriate API.
So if you want to check things without a specific req request object, like you said, you need to just access that same storage. On the bottom of the first documentation page, it details ...
App Inventor 2 上传文件和图片到服务器教程 · App Inventor 2 中文网
...eb客户端 组件的 PostFile 方法将指定路径的文件以 multipart/form-data 格式 POST 到服务器 URL。服务器端使用标准的文件上传处理方式即可接收。
组件准备
在 App Inventor 2 设计视图中，添加以下组件：
组...
Why is auto_ptr being deprecated?
...r unique_ptr usage) , can you suggest what was intended in those remaining 96.8584073465% of all usage?
– Marc van Leeuwen
Jun 19 '14 at 4:49
...