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Testing for empty or nil-value string [duplicate]

...t’s false, empty, or a whitespace string. For example, "", " ", nil, [], and {} are all blank. share | improve this answer | follow | ...
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Why does ENOENT mean “No such file or directory”?

... It's an abbreviation of Error NO ENTry (or Error NO ENTity), and can actually be used for more than files/directories. It's abbreviated because C compilers at the dawn of time didn't support more than 8 characters in symbols. ...
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Days between two dates? [duplicate]

...u’ve literally got two date objects, you can subtract one from the other and query the resulting timedelta object for the number of days: >>> from datetime import date >>> a = date(2011,11,24) >>> b = date(2011,11,17) >>> a-b datetime.timedelta(7) >>> ...
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WebView link click open default browser

Right now I have an app that loads a webview and all the clicks are kept within the app. What I would like to do is when a certain link, for example, http://www.google.com is clicked within the app it opens the default browser. If anyone has some ideas please let me know! ...
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How do I uniquely identify computers visiting my web site?

...wsers are subject to “device fingerprinting” via the version and configuration information that they will transmit to websites upon request. We implemented one possible fingerprinting algorithm, and collected these fingerprints from a large sample of browsers that visited our test...
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How to adjust an UIButton's imageSize?

... If I understand correctly what you're trying to do, you need to play with the buttons image edge inset. Something like: myLikesButton.imageEdgeInsets = UIEdgeInsets(top, left, bottom, right) ...
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is there a css hack for safari only NOT chrome?

... both webkit browsers but im having problems with div alignments in chrome and safari, each displays differently. 18 Answer...
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Return HTTP status code 201 in flask

We're using Flask for one of our API's and I was just wondering if anyone knew how to return a HTTP response 201? 9 Answers...
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How to learn R as a programming language [closed]

...ning it as a statistical system. My question is prompted by lack of understanding of such functions as parse, eval, etc. which may not find frequent use by an R user with a 'statistics' persuasion. ...
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Eclipse “Server Locationssection disabled and need to change to use Tomcat installation

...metadata]" bit should have been replaced by something else. Open (or close and reopen) the Overview screen for the server. share | improve this answer | follow ...