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Xcode build failure “Undefined symbols for architecture x86_64”

...ometimes the error "build failure “Undefined symbols for architecture x86_64”" may be caused by this. Because, some libs (not Apple's) were compiled for x32 originally and doesn't support x64. So what you need, is to change the "Architectures" for your project target like this NB. If you're us...
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How do I get textual contents from BLOB in Oracle SQL

... First of all, you may want to store text in CLOB/NCLOB columns instead of BLOB, which is designed for binary data (your query would work with a CLOB, by the way). The following query will let you see the first 32767 characters (at mo...
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How to check if object (variable) is defined in R?

... heh. Happens to me all the time when I am testing out examples before posting, Gavin or Josh have already answered it. – Maiasaura Feb 20 '12 at 22:17 ...
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How to check if an element is in an array

...ins function has been made into a pair of extension method on Array, which allow you to do either of: let a = [ 1, 2, 3, 4 ] a.contains(2) // => true, only usable if Element : Equatable a.contains { $0 < 1 } // => false ...
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Export database schema into SQL file

... Generate Scripts When generating the scripts, there is an area that will allow you to script, constraints, keys, etc. From SQL Server 2008 R2 there is an Advanced Option under scripting: share | ...
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Creating a UICollectionView programmatically

...wDataSource,UICollectionViewDelegateFlowLayout> { UICollectionView *_collectionView; } Implementation File:-- - (void)viewDidLoad { [super viewDidLoad]; self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; UICollectionViewFlowLayout *layout=[[UICollect...
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How can I get the current network interface throughput statistics on Linux/UNIX? [closed]

...$dev/statistics"; my %stats = do { opendir +(my $dh), $dir; local @_ = readdir $dh; closedir $dh; map +($_, []), grep !/^\.\.?$/, @_; }; if (-t STDOUT) { while (1) { print "\033[H\033[J", run(); my ($time, $us) = gettimeofday(); my ($sec, $min, $hour) = l...
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Can I define a class name on paragraph using Markdown?

...lt;p class='specialParagraph' markdown='1'> **Another paragraph** which allows *Markdown* within it. </p> Possible Solution: (Untested and intended for <blockquote>) I found the following online: Function function _DoBlockQuotes_callback($matches) { ...cut... //add id a...
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How to trigger event when a variable's value is changed?

...e you want to create a property. public int MyProperty { get { return _myProperty; } set { _myProperty = value; if (_myProperty == 1) { // DO SOMETHING HERE } } } private int _myProperty; This allows you to run some code any time the pr...
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Sharing a result queue among several processes

... can I share a queue with asynchronous worker processes started with apply_async ? I don't need dynamic joining or anything else, just a way for the workers to (repeatedly) report their results back to base. ...