大约有 3,285 项符合查询结果（耗时：0.0120秒） [XML]
Why (0-6) is -6 = False? [duplicate]
...ific structure is used to refer small integers and share them so access is fast. It is an array of 262 pointers to integer objects. Those integer objects are allocated during initialization in a block of integer objects we saw above. The small integers range is from -5 to 256. Many Python programs s...
How to check if an NSDictionary or NSMutableDictionary contains a key?
...*m and you can't figure out why your program is slow. Almost everything is fast once or in small cases. But as programs grow using the wrong data structure (like array instead of dict in the first example) will end up costing you big.
– Andrew Hoos
May 8 '14 at...
Check if one IEnumerable contains all elements of another IEnumerable
What is the fastest way to determine if one IEnumerable contains all the elements of another IEnumerable when comparing a field/property of each element in both collections?
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Performance of Find() vs. FirstOrDefault() [duplicate]
...aspx), and is likely using a standard for loop from 0 to Count (or another fast internal mechanism probably operating directly on its internal/wrapped array). By getting rid of the overhead of enumerating through (and doing the version checks to ensure that the list hasn't been modified) the Find me...
Avoid dropdown menu close on click inside
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this was the fastest solution for me
– Jonathan Morales Vélez
Oct 24 '16 at 16:44
16
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How can I test if a letter in a string is uppercase or lowercase using JavaScript?
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best answer by far, fast, not allocating any memory, or transforming data.
– Martijn Scheffer
Sep 6 '18 at 22:19
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Eclipse: How do i refresh an entire workspace? F5 doesn't do it
...eate a new Program configuration Point the location to an exe that is very fast (I use Cygwin's 'ls')
On the Refresh tab, choose Refresh Resources upon completion, The Entire Workspace
On the Build tab, deselect Build before launch
Run the tool to refresh all projects.
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Choosing between std::map and std::unordered_map [duplicate]
...just because unordered_map is constant speed (O(1)) doesn't mean that it's faster than map (of order log(N)). The constant may be bigger than log(N) especially since N is limited by 232 (or 264).
So in addition to the other answers (map maintains order and hash functions may be difficult) it may be...
Dictionaries and default values
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+1 for readability, but if/else is much faster. That might or might not play a role.
– Tim Pietzcker
Jul 6 '13 at 9:20
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From ND to 1D arrays
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a.ravel() looks to be around three times as fast as a.reshape(-1). a.flatten() is way slower, as it needs to make a copy.
– BallpointBen
Aug 29 '18 at 22:52
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