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Convert two lists into a dictionary
...rnandoWittmann. {thing} is syntactic sugar to construct a set() containing one element. {*iterable} is syntactic sugar to construct a set containing several elements. {k:v} or {**mapping} will construct a dict, but that's syntactically quite distinct.
– Dan Lenski
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Allow multiple roles to access controller action
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This is okay if you only have one controller that you need to authorize. If you have more than one, you're duplicating those string constants (yuck). I much prefer the static class that has the role names. My pet hate is duplicate strings... so so bad.
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Is there a JSON equivalent of XQuery/XPath?
...vides for Javascript and PHP. If you need a Java implementation, there’s one here: code.google.com/p/json-path
– Matthias Ronge
Nov 16 '12 at 7:20
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unix - head AND tail of file
...e.g. output from a command), you can use 'tee' to fork the stream and send one stream to head and one to tail. This requires using either the '>( list )' feature of bash (+ /dev/fd/N):
( COMMAND | tee /dev/fd/3 | head ) 3> >( tail )
or using /dev/fd/N (or /dev/stderr) plus subshells wit...
How do I iterate over a range of numbers defined by variables in Bash?
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for i in $(seq 1 $END); do echo $i; done
edit: I prefer seq over the other methods because I can actually remember it ;)
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Why can't a text column have a default value in MySQL?
...orts of incompatibilities when trying to install DB scripts that worked on one system but not others.
I am running into the same problem now on a webapp I'm modifying for one of my clients, originally deployed on Linux MySQL v5.0.83-log. I'm running Windows MySQL v5.1.41. Even trying to use the l...
Difference between single and double quotes in Bash
...pansions). The backslash retains its special meaning only when followed by one of the following characters: $, `, ", \, or newline. Within double quotes, backslashes that are followed by one of these characters are removed. Backslashes preceding characters without a special meaning are left unmodifi...
Using ViewPagerIndicator library with Android Studio and Gradle
...n repo, which contains a packaged aar that they put together. Once that's done, you can simply add this line to your dependencies and everything should work once you sync your project with your gradle files.
Make sure that the Maven Repo is listed above the mavenCentral() entry. Otherwise, it will ...
How to put a line comment for a multi-line command [duplicate]
... for. The best you can do is a comment on the lines before the command, or one single comment at the end of the command line, or a comment after the command.
You can't manage to intersperse comments inside a command this way. The \s express an intent to merge lines, so for all intents and purposes ...
Display a tooltip over a button using Windows Forms
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nice, but a question: if I have more than one button in a form, I need more tooltip or I can set multiple descriptions and buttons for the same tooltip?
– ghiboz
Apr 23 '14 at 17:24
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