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Rails: how do I validate that something is a boolean?
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edited Jul 18 '16 at 8:15
Luca Spiller
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How to increment a NSNumber
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Update: FYI, I personally like BoltClock's and DarkDusts's one-line answers better. They're mo...
how to set “camera position” for 3d plots using python/matplotlib?
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164
By "camera position," it sounds like you want to adjust the elevation and the azimuth angle th...
Getting a list item by index
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list1[0];
Assuming list's type has an indexer defined.
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Mongo: find items that don't have a certain field
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171
Yeah, it's possible using $exists:
db.things.find( { a : { $exists : false } } ); // return i...
With GitHub how do I push all branches when adding an existing repo?
...ntioned in "How to make “git push” include tags within a branch?", git 1.8.3+ (May 2013) introduced:
git push --follow-tags
This won't push all the tags, but only the ones accessible from the branch(es) HEAD(s) you are pushing.
That can help keeping that operation (pushing commits and ta...
Undo a particular commit in Git that's been pushed to remote repos
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Identify the hash of the commit, using git log, then use git revert <commit> to create ...
Can't update Macports (with Mac OS X Mavericks)
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edited Oct 26 '14 at 23:13
j-beda
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answered Oct 28 '13 at 12:12
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