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Optimise PostgreSQL for fast testing
...s as fsync=off without the giant data corruption risk. You do have a small window of loss of recent data if you enable async commit - but that's it.
If you have the option of slightly altering the DDL, you can also use UNLOGGED tables in Pg 9.1+ to completely avoid WAL logging and gain a real speed...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
... same for my computer Intel Core 2 Duo with mingw gcc4.4,who's running on windows 7(32).It does show a big difference when I compile this segment with a little older pc intel centrino with gcc 4.6,who's running on ubuntu 12.04 i386.
– Hongxu Chen
Sep 27 '12 at...
Floating point vs integer calculations on modern hardware
... while long and long long are both 64-bit types. (Maybe it's designed for Windows where x86-64 still uses 32-bit long? Or maybe it's designed for 32-bit mode.) On Linux, the x32 ABI has 32-bit long in 64-bit mode, so if you have the libraries installed, use gcc -mx32 to compiler for ILP32. Or ju...
社交应用组件 · App Inventor 2 中文网
... 顶部 var qrcode = new QRCode("qrcode", { text: window.location.href + "?f=share", //URL地址 width: 150, height: 150, colorDark: '#000000', //二维码颜色 colorLight: "#ffffff" //背景颜色}); App Inventor 2 中文网 © 2023 - docume...
Reset/remove CSS styles for element only
...;
visibility: unset;
white-space: unset;
width: unset;
will-change: unset;
window-dragging: unset;
word-break: unset;
word-spacing: unset;
word-wrap: unset;
writing-mode: unset;
z-index: unset;
share
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Colors in JavaScript console
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The Windows 7 location appears to be `C:\Users\<User Name>\AppData\Local\Google\Chrome\User Data\Default\User StyleSheets`. Also, there's a Solarized Color Scheme Stylesheet for it.
– Weston C
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PHP parse/syntax errors; and how to solve them
...ly.
Excellent IDEs with syntax check (all of them are available for Linux, Windows and Mac):
NetBeans [free]
PHPStorm [$199 USD]
Eclipse with PHP Plugin [free]
Sublime [$80 USD] (mainly a text editor, but expandable with plugins, like PHP Syntax Parser)
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How to limit setAccessible to only “legitimate” uses?
...ificantly)? It is hard to just throw java desktop applications out of the window because of this.
– Sero
Jan 21 '17 at 1:12
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Peak signal detection in realtime timeseries data
...revious signals. The algorithm takes 3 inputs: lag = the lag of the moving window, threshold = the z-score at which the algorithm signals and influence = the influence (between 0 and 1) of new signals on the mean and standard deviation. For example, a lag of 5 will use the last 5 observations to smo...
Separation of business logic and data access in django
...cord for persistence doesn't mean separation of concerns should go out the window. Great answer.
– Scott Coates
Apr 18 '13 at 0:57
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