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node.js shell command execution
...s = require('sys')
var exec = require('child_process').exec;
function puts(error, stdout, stderr) { sys.puts(stdout) }
exec("ls -la", puts);
it works perfectly. :)
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Specify sudo password for Ansible
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Tried this but I got this error: fatal: [localhost]: FAILED! => {"changed": false, "failed": true, "module_stderr": "sudo: a password is required\n", "module_stdout": "", "msg": "MODULE FAILURE", "parsed": false}
– JohnnyQ
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Fetch frame count with ffmpeg
... number. See Edit lists below.
ffprobe: Query the container
ffprobe -v error -select_streams v:0 -show_entries stream=nb_frames -of default=nokey=1:noprint_wrappers=1 input.mp4
This is a fast method.
Not all formats (such as Matroska) will report the number of frames resulting in the output o...
how to change default python version?
I have installed python 3.2 in my mac. After I run /Applications/Python 3.2/Update Shell Profile.command , it's confusing that when I type python -V in Terminal it says that Python 2.6.1 , how can I change the default python version?
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Two way sync with rsync
...torage, etc.
– alex
Jun 4 '15 at 10:05
3
@wener Don't use a hammer for a screw, or a screwdriver ...
Is there a constraint that restricts my generic method to numeric types?
...m(1L, 2, 3, 4, 5);
NumericPolicies.Instance.Sum("www", "") // compile-time error.
The solution is compile-time safe. CityLizard Framework provides compiled version for .NET 4.0. The file is lib/NETFramework4.0/CityLizard.Policy.dll.
It's also available in Nuget: https://www.nuget.org/packages/Cit...
Swift equivalent for MIN and MAX macros
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If you're getting a fun compiler error in XCode 9 like me, saying that max() doesn't exist even when you clearly pass it two Ints, then change it to Swift.max and suddenly yay, things are better. Thanks wm.p1us!
– xaphod
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Joining three tables using MySQL
...yntax, it is well worth your time to learn it. It will help you avoid JOIN errors like you have made in the future.
– RedFilter
Sep 14 '10 at 14:38
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JavaScript: Class.method vs. Class.prototype.method
...ampleClass();
someInstance.method('Called from instance');
// >> error! `someInstance.method is not a function`
With same code, if .prototype is added,
ExampleClass.prototype.method = function(customString){
console.log((customString !== undefined)?
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What is the purpose of python's inner classes?
... binding can be recreated without inner class at the cost of a tedious and error-prone instrumentation of the classes.
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