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Detect backspace in empty UITextField

... answered Dec 30 '09 at 23:10 AndrewAndrew 2,1921414 silver badges1414 bronze badges ...
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How can I start PostgreSQL server on Mac OS X?

I had forgotten to run the initdb command. 33 Answers 33 ...
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How to call a method defined in an AngularJS directive?

... Aug 28 '13 at 12:29 Oliver WienandOliver Wienand 3,94611 gold badge1111 silver badges99 bronze badges ...
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“You are on a branch yet to be born” when adding git submodule

I am attempting to add a few submodules to my .vim/bundles directory, and when I attempt to add this particular repo Git gives me a strange error I've never seen before: ...
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remove None value from a list without removing the 0 value

...mbda x: x is not None, L) -- You could get rid of the lambda using partial and operator.is_not I think, but it's probably not worth it since the list-comp is so much cleaner. – mgilson Apr 19 '13 at 3:36 ...
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Calling pylab.savefig without display in ipython

...thin IPython notebook. I am not clear on the interaction between IPython and matplotlib.pylab in this regard. But, when I call pylab.savefig("test.png") the current figure get's displayed in addition to being saved in test.png . When automating the creation of a large set of plot files, this ...
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Pass props to parent component in React.js

... Edit: see the end examples for ES6 updated examples. This answer simply handle the case of direct parent-child relationship. When parent and child have potentially a lot of intermediaries, check this answer. Other solutions are missing the point While they still work fine, other answers are miss...
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What is the performance cost of having a virtual method in a C++ class?

...any of its parent classes) means that the class will have a virtual table, and every instance will have a virtual pointer. ...
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WCF vs ASP.NET Web API [closed]

I've spent a few months trying to grasp the concepts behind WCF and recently I've developed my first WCF service application. ...
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What is the difference between NULL, '\0' and 0?

...e appear to be differences between various values of zero -- NULL , NUL and 0 . 11 Answers ...