大约有 40,813 项符合查询结果（耗时：0.0470秒） [XML]
_DEBUG vs NDEBUG
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answered Feb 18 '10 at 17:12
ChristophChristoph
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Reading large text files with streams in C#
...files are about 300-400 KB which is fine loading. But when they go beyond 100 MB the process has a hard time (as you'd expect).
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Dynamically update values of a chartjs chart
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101
Update: Looks like chartjs has been updated (see comment below). There are some examples up t...
How can I listen for a click-and-hold in jQuery?
...re an event when a user clicks on a button, then holds that click down for 1000 to 1500 ms.
8 Answers
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Appending the same string to a list of strings in Python
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answered Jan 12 '10 at 16:51
gahooagahooa
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Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
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edited Jun 4 '10 at 12:40
scunliffe
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Django: accessing session variables from within a template?
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answered Mar 31 '10 at 10:11
Ludwik TrammerLudwik Trammer
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How can I remove the first line of a text file using bash/sed script?
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1073
Try tail:
tail -n +2 "$FILE"
-n x: Just print the last x lines. tail -n 5 would give you t...
How to set data attributes in HTML elements
I have a div with an attribute data-myval = "10" . I want to update its value; wouldn't it change if I use div.data('myval',20) ? Do I need to use div.attr('data-myval','20') only?
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How do I create test and train samples from one dataframe with pandas?
... would just use numpy's randn:
In [11]: df = pd.DataFrame(np.random.randn(100, 2))
In [12]: msk = np.random.rand(len(df)) < 0.8
In [13]: train = df[msk]
In [14]: test = df[~msk]
And just to see this has worked:
In [15]: len(test)
Out[15]: 21
In [16]: len(train)
Out[16]: 79
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