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Why does scanf() need “%lf” for doubles, when printf() is okay with just “%f”?
Why is it that scanf() needs the l in " %lf " when reading a double , when printf() can use " %f " regardless of whether its argument is a double or a float ?
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How persistent is localStorage?
I'm depending heavily on localStorage for a plugin I'm writing. All the user settings are stored in it. Some settings require the user the write regex'es and they would be sad if their regex rules are gone at some point.
So now I am wondering just how persistent the localStorage is.
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Is there a way to delete a line in Visual Studio without cutting it?
I want to delete a line just like hitting Ctrl + X without anything selected, but without saving the line to the copy stack. Is this possible?
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Drawing an image from a data URL to a canvas
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Change default timeout for mocha
If we have a unit test file my-spec.js and running with mocha:
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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...等号过程。图2-9 调用点击等号过程四、代码测试及说明连接手机进行测试，按照设定的规范操作计算器，计算结果正确。这里我们创建了3个过程——点击数字、点击算符及点击等号，这三个过程是本程序中仅有的三个过程，在...
HTML5 canvas ctx.fillText won't do line breaks?
I can't seem to be able to add text to a canvas if the text includes "\n". I mean, the line breaks do not show/work.
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Commands executed from vim are not recognizing bash command aliases
I use bash on mac and one of the aliases is like this
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How to set an environment variable only for the duration of the script?
On Linux (Ubuntu 11.04) in bash, is it possible to temporarily set an environment variable that will only be different from the normal variable for the duration of the script? For example, in a shell script, making an app that saves to HOME portable by temporarily setting HOME to a folder in the pre...
Joining three tables using MySQL
I have three tables named
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