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The way to check a HDFS directory's size?
...dfs dfs -du [-s] [-h] URI [URI …]
You can also run hadoop fs -help for more info and specifics.
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What's a reliable way to make an iOS app crash?
...version of the C runtime OR the compiler this might not lead to a crash anymore. see Is null pointer dereference undefined behavior in Objective-C?)
(in swift you would have to bridge to objC to do this)
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How to use glyphicons in bootstrap 3.0
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How to set standard encoding in Visual Studio
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
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Java regex capturing groups indexes
...ched with Matcher.group(String name). The regex is longer, but the code is more meaningful, since it indicates what you are trying to match or extract with the regex.
The group names are used in back-reference \k<name> in pattern and ${name} in replacement string.
Named capturing groups are ...
Finding out the name of the original repository you cloned from in Git
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You can also use git remote show origin to see much more information about just that remote.
– Cascabel
Nov 2 '10 at 14:38
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Count number of occurences for each unique value
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Showing line numbers in IPython/Jupyter Notebooks
... the CodeMirror area. See the QuickHelp for other keyboard shortcuts.
In more details CTRL - M (or ESC) bring you to command mode, then pressing the L keys should toggle the visibility of current cell line numbers. In more recent notebook versions Shift-L should toggle for all cells.
If you can't...