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Recommended way of making React component/div draggable
...anything w/ a higher z-index that gets in the way, then you're toast,
// etc.
componentDidUpdate: function (props, state) {
if (this.state.dragging && !state.dragging) {
document.addEventListener('mousemove', this.onMouseMove)
document.addEventListener('mouseup', this.onM...
Java: parse int value from a char
...', '2', ... in ascii are ascending. So e.g. '0' in ascii is 48, '1' is 49, etc. So if you take '2' - '0' you really just get 50 - 48 = 2. Have a look at an ASCII table in order to understand this principle better. Also, 'x' means get the ascii value of the character in Java.
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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...户可以很方便地迁移到postfix。Postfix支持/var[/spool]/mail、/etc/aliases、 NIS、和 ~/.forward 文件。
4. 更健壮：
postfix被设计成在重负荷之下仍然可以正常工作。当系统运行超出了可用的内存或磁盘空间时，postfix会自动减少运行进程...
LLVM vs clang on OS X
...n use for things like code analyzing, autocompletion, syntax highlighting, etc… This is very handy for IDEs.
– user142019
Nov 9 '11 at 9:43
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Xcode: failed to get the task for process
...u click on the project (i.e. next to build settings tab, build phases tab, etc).
In my case there were broken links for Game Center and In-App Purchases that needed fixing (by clicking the "fix me" buttons) to solve this issue.
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How do you return the column names of a table?
...but is a succinct approach when connecting to a database via Python/Java/C/etc.
– Arthur Hebert
Mar 29 '19 at 17:53
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In VIM, how do I break one really long line into multiple lines?
... your case, the gq command would be <ESC> (get out of Insert/Replace/etc mode), then gq80l
– MidnightLightning
Aug 13 '09 at 14:46
6
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SQL order string as number
...r order by part of a field something like 'tensymbols13', 'tensymbols1222' etc.
ORDER BY CONCAT( REPEAT( "0", 18 - LENGTH( LEFT( stringfield , 10 ) ) ) , LEFT( stringfield , 10 ) )
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impro...
Date vs DateTime
...simple date without worrying about time portion, timezones, local vs. utc, etc.
Date today = Date.Today;
Date yesterday = Date.Today.AddDays(-1);
Date independenceDay = Date.Parse("2013-07-04");
independenceDay.ToLongString(); // "Thursday, July 4, 2013"
independenceDay.ToShortString(); // "7...
Switching to landscape mode in Android Emulator
... Mac users, you only need to use the fn key if the setting "Use all F1, F2 etc. keys as function keys" (under System Preferences -> Keyboard) is checked.
left-ctrl+F11on Windows 7
It works fine in Windows 7 for android emulator to change the landscape orientation to portrait and vice versa.
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