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Uniq by object attribute in Ruby
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The hash method is better if you want to group by say album_id while (say) summing up num_plays.
– thekingoftruth
Sep 13 '13 at 22:59
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JavaScript check if variable exists (is defined/initialized)
Which method of checking if a variable has been initialized is better/correct?
(Assuming the variable could hold anything (string, int, object, function, etc.))
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Linux: compute a single hash for a given folder & contents?
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One possible way would be:
sha1sum path/to/folder/* | sha1sum
If there is a whole directory tree, you're probably better off using find and xargs. One possible command would be
find path/to/folder -type f -print0 | sort -z | xargs -0 sha1sum | sha1sum
And, finally, if you also need ...
Detecting syllables in a word
...ives for false positives (never put a hyphen where it doesn't belong, even if that means missing some legitimate hyphenation opportunities).
– Adrian McCarthy
Aug 24 '12 at 22:05
1...
Converting any string into camel case
...return str.replace(/(?:^\w|[A-Z]|\b\w|\s+)/g, function(match, index) {
if (+match === 0) return ""; // or if (/\s+/.test(match)) for white spaces
return index === 0 ? match.toLowerCase() : match.toUpperCase();
});
}
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convert an enum to another type of enum
...statement here
}
}
Obviously there's no need to use separate classes if you don't want to. My preference is to keep extension methods grouped by the classes/structures/enumerations they apply to.
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Android: how do I check if activity is running?
...per.onStop();
active = false;
}
}
The only gotcha is that if you use it in two activities that link to each other then onStop on the first is sometimes called after onStart in second. So both might be true briefly.
Depending on what you are trying to do (update the current activity...
Converting XML to JSON using Python?
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@Martin Blech If I create a json file from my django models file. How can I map my xml file to convert the xml to json for the required fields?
– sayth
May 14 '14 at 8:02
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How can I pass an argument to a PowerShell script?
...tement in your script
$iTunes = New-Object -ComObject iTunes.Application
if ($iTunes.playerstate -eq 1)
{
$iTunes.PlayerPosition = $iTunes.PlayerPosition + $step
}
Call it with
powershell.exe -file itunesForward.ps1 -step 15
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How to find out if an item is present in a std::vector?
...ind(vec.begin(), vec.end(), item) != vec.end()
This returns a bool (true if present, false otherwise). With your example:
#include <algorithm>
#include <vector>
if ( std::find(vec.begin(), vec.end(), item) != vec.end() )
do_this();
else
do_that();
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