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What's the difference between identifying and non-identifying relationships?
... where a parent is not
required or mandatory where a parent is required by setting the
parent table cardinality...
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When should null values of Boolean be used?
...have a value of null". I can create a Boolean (Boolean a = true;) and then set a to null (a = null;). It may not be elegant or wise, but it's possible.
– peter.murray.rust
Jun 25 '12 at 14:51
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Getting the last element of a split string array
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brilliant, all in one go, no need for intermediary var to setup the array...nice
– virtualeyes
Sep 23 '12 at 8:26
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Take a full page screenshot with Firefox on the command-line
... the developer tools (F12). If it is not enabled go to the developer tools settings (gear button) and choose "Take a fullpage screenshot" at the "Available Toolbox Buttons" section.
source: developer.mozilla.org
By default the screenshots are saved in the download directory. This works similar to...
Should I use static_cast or reinterpret_cast when casting a void* to whatever
... editor after snippets, if snippets enabled
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How can I extract audio from video with ffmpeg?
...m that's already in there.
Read the output to see what codec it is, to set the right filename extension.
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pandas three-way joining multiple dataframes on columns
... columns=['name', 'attr31', 'attr32'])
dfs = [df1, df2, df3]
dfs = [df.set_index('name') for df in dfs]
dfs[0].join(dfs[1:])
attr11 attr12 attr21 attr22 attr31 attr32
name
a 5 9 5 19 15 49
b 4 61 14 ...
Reliable timer in a console application
...nd threads (like timer threads) will still work. You may also use an AutoResetEvent to block the execution, then (when you need to) you can call Set() method on that AutoResetEvent object to release the main thread. Also ensure that your reference to Timer object doesn't go out of scope and garbage ...
How to pass password automatically for rsync SSH command?
...take care that the keyfile itself is adequately secured.
Instructions for setting up passwordless ssh access
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Parsing huge logfiles in Node.js - read in line-by-line
I need to do some parsing of large (5-10 Gb)logfiles in Javascript/Node.js (I'm using Cube).
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