大约有 47,000 项符合查询结果（耗时：0.0674秒） [XML]
Transpose list of lists
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edited Mar 9 at 15:01
answered Jun 24 '11 at 20:59
j...
Are there strongly-typed collections in Objective-C?
...<NSString*>* arr = @[@"str"];
NSString* string = [arr objectAtIndex:0];
NSNumber* number = [arr objectAtIndex:0]; // Warning: Incompatible pointer types initializing 'NSNumber *' with an expression of type 'NSString *'
And in Swift code, they will produce a compiler error:
var str: String ...
How do I update pip itself from inside my virtual environment?
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edited Sep 7 '16 at 20:09
M. Dudley
25.4k2929 gold badges132132 silver badges224224 bronze badges
a...
Trim spaces from end of a NSString
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901
Taken from this answer here: https://stackoverflow.com/a/5691567/251012
- (NSString *)stringBy...
How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
...ly strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this sum while compilation and print the result ...
What are all the escape characters?
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dimo414
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answered Sep 2 '09 at 12:14
rtpersonrtpe...
How do I make a placeholder for a 'select' box?
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3074
A non-CSS - no JavaScript/jQuery answer:
<select>
<option value="" disabled...
Batch: Remove file extension
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edited Jan 30 at 10:07
answered Jul 9 '10 at 18:35
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Approximate cost to access various caches and main memory?
...ycles etc. The second link served the following numbers:
Core i7 Xeon 5500 Series Data Source Latency (approximate) [Pg. 22]
local L1 CACHE hit, ~4 cycles ( 2.1 - 1.2 ns )
local L2 CACHE hit, ~10 cycles ( 5.3 - 3.0 ns...
Better way to check if a Path is a File or a Directory?
...a directory");
else
MessageBox.Show("Its a file");
Update for .NET 4.0+
Per the comments below, if you are on .NET 4.0 or later (and maximum performance is not critical) you can write the code in a cleaner way:
// get the file attributes for file or directory
FileAttributes attr = File.GetAt...