大约有 40,000 项符合查询结果（耗时：0.0454秒） [XML]
How to easily truncate an array with JavaScript?
Linq has a convenient operator method called Take() to return a given number of elements in anything that implements IEnumerable . Is there anything similar in jQuery for working with arrays?
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How do I round a decimal value to 2 decimal places (for output on a page)
...ng the value of a decimal currently with .ToString() , it's accurate to like 15 decimal places, and since I'm using it to represent dollars and cents, I only want the output to be 2 decimal places.
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OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
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This is a recurring subject in Stackoverflow and since I was unable to find a relevant implementation I decided to accept the challenge.
I made some modifications to the squares demo present in OpenCV and the resulting C++ code below is able to detect a sheet...
How to get URL parameter using jQuery or plain JavaScript?
I have seen lots of jQuery examples where parameter size and name are unknown.
33 Answers
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Convert form data to JavaScript object with jQuery
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community wiki
12 revs, 11 users 49%Tobias Cohen
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Numpy: find first index of value fast
...ited Oct 21 '13 at 7:44
Jacques Kvam
2,06611 gold badge2020 silver badges2727 bronze badges
answered Oct 5 '11 at 11:05
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Get UIScrollView to scroll to the top
How do I make a UIScrollView scroll to the top?
14 Answers
14
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Sorting data based on second column of a file
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You can use the sort command:
sort -k2 -n yourfile
-n, --numeric-sort compare according to string numerical value
For example:
$ cat ages.txt
Bob 12
Jane 48
Mark 3
Tashi 54
$ sort -k2 -n ages.txt
Mark 3
Bob 12
Jane 48
Tashi 54
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Read only the first line of a file?
...wline.
The with statement automatically closes the file again when the block ends.
The with statement only works in Python 2.5 and up, and in Python 2.5 you need to use from __future__ import with_statement
In Python 3 you should specify the file encoding for the file you open. Read more...
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How to check if an int is a null
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AlexAlex
22.6k66 gold badges5151 silver badges5050 bronze badges
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