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How to copy an object in Objective-C

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What's the dSYM and how to use it? (iOS SDK)

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How to check whether a file or directory exists?

...// file does not exist } else { // other error } } See : http://golang.org/pkg/os/#IsNotExist share | improve this answer | follow | ...
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Execute bash script from URL

Say I have a file at the URL "http://mywebsite.com/myscript.txt" that contains a script: 14 Answers ...
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Batch files - number of command line arguments

...still use shift to count more than 9 ... and without having 10 lines of equally-looking code. – Joey Sep 30 '09 at 13:13 add a comment  |  ...
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Unicode characters in URLs

... take care of display & paste issues and make it human-readable. E. g. http://ko.wikipedia.org/wiki/위키백과:대문 Edit: when you copy such an url in Firefox, the clipboard will hold the percent-encoded form (which is usually a good thing), but if you copy only a part of it, it will remain...
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Checking if a string can be converted to float in Python

...False print(isfloat("12.34.56")) False Two dots not allowed. print(isfloat("#56")) False print(isfloat("56%")) False print(isfloat("0E0")) True print(isfloat("x86E0")) False print(isfloat("86-5")) ...
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std::enable_if to conditionally compile a member function

... I want to use std::enable_if to choose between two member-functions and allow only one of them to be used. 7 Answers ...
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Cost of len() function

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How to “EXPIRE” the “HSET” child key in redis?

I need to expire all keys in redis hash, which are older than 1 month. 11 Answers 11 ...