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git: difference between “branchname” and “refs/heads/branchname”
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128
A ref is anything pointing to a commit, for example, branches (heads), tags, and remote branche...
Order of member constructor and destructor calls
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142
In other words, are members guaranteed to be initialized by order of declaration and destroyed ...
MySQL CONCAT returns NULL if any field contain NULL
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288
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`...
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo
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42 Answers
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How do you use window.postMessage across domains?
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Here is an example that works on Chrome 5.0.375.125.
The page B (iframe content):
<html>
<head></head>
<body>
<script>
top.postMessage('hello', 'A');
</script>
</body>
</html>
Note t...
How do I get cURL to not show the progress bar?
...m, you could always redirect stderr to /dev/null:
curl http://google.com 2>/dev/null > temp.html
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Determine which element the mouse pointer is on top of in JavaScript
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152
DEMO
There's a really cool function called document.elementFromPoint which does what it sounds ...
Visual Studio 2012 - Intellisense sometimes disappearing / broken
My colleagues and I are using VS2012 for some weeks now. Sometimes after working several hours the intellisense is broken. After closing all open tabs it works again.
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DistutilsOptionError: must supply either home or prefix/exec-prefix — not both
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289
Are you using OS X and Homebrew? The Homebrew python page https://github.com/Homebrew/brew/bl...
Extracting just Month and Year separately from Pandas Datetime column
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edited May 3 '15 at 20:17
answered Aug 5 '14 at 22:18
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