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Open link in new tab or window [duplicate]

... You should add the target="_blank" and rel="noopener noreferrer" in the anchor tag. For example: <a target="_blank" rel="noopener noreferrer" href="http://your_url_here.html">Link</a> Adding rel="noopener noreferrer" is not mandatory, b...
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Why is it slower to iterate over a small string than a small list?

...sions. I'll examine the compiled code. For Python 3: import dis def list_iterate(): [item for item in ["a", "b", "c"]] dis.dis(list_iterate) #>>> 4 0 LOAD_CONST 1 (<code object <listcomp> at 0x7f4d06b118a0, file "", line 4>) #>>> ...
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Named routes _path vs _url

... _path helpers provide a site-root-relative path. You should probably use this most of the time. _url helpers provide an absolute path, including protocol and server name. I've found that I mainly use these in emails when cre...
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Why doesn't list have safe “get” method like dictionary?

...f your list). Of course, you can easily implement this yourself: def safe_list_get (l, idx, default): try: return l[idx] except IndexError: return default You could even monkeypatch it onto the __builtins__.list constructor in __main__, but that would be a less pervasive change since...
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apache redirect from non www to www

...put www. in the ServerAlias using the *. wildcard. Because I messed up the ordering of the VirtualHost entries, the *. wildcard had the opportunity to match when I didn't think it would. – dmiller309 May 10 '14 at 21:28 ...
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Xcode doesn't show the line that causes a crash

...rminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSSingleObjectArrayI objectAtIndex:]: index 1 beyond bounds [0 .. 0]' *** First throw call stack: ( 0 CoreFoundation 0x000000010e85cd4b __exceptionPreprocess + 171 1 libobjc.A.dylib ...
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C# Lazy Loaded Automatic Properties

... 4.0 Lazy<T> type to create this pattern private Lazy<string> _someVariable =new Lazy<string>(SomeClass.IOnlyWantToCallYouOnce); public string SomeVariable => _someVariable.Value; This code will lazily calculate the value of _someVariable the first time the Value expression i...
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Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...blic class ContactRepository : IContactRepository { MongoServer _server = null; MongoDatabase _database = null; MongoCollection _contacts = null; public ContactRepository(string connection) { if (string.IsNullOrWhiteSpace(connection)) ...
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What is the “__v” field in Mongoose

I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used? ...
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How do I profile memory usage in Python?

... 51336 2 3133500 96 type 9 667 1 24012 1 3157512 97 __builtin__.wrapper_descriptor <76 more rows. Type e.g. '_.more' to view.> >>> h.iso(1,[],{}) Partition of a set of 3 objects. Total size = 176 bytes. Index Count % Size % Cumulative % Kind (class / ...