大约有 47,800 项符合查询结果（耗时：0.0706秒） [XML]
How to get a value from a cell of a dataframe?
...ith only one row, then access the first (only) row as a Series using iloc, and then the value using the column name:
In [3]: sub_df
Out[3]:
A B
2 -0.133653 -0.030854
In [4]: sub_df.iloc[0]
Out[4]:
A -0.133653
B -0.030854
Name: 2, dtype: float64
In [5]: sub_df.iloc[0]['A']
Ou...
Is SecureRandom thread safe?
Is SecureRandom thread safe? That is, after initializing it, can access to the next random number be relied on to be thread safe? Examining the source code seems to show that it is, and this bug report seems to indicate that its lack of documentation as thread safe is a javadoc issue. Has anyone...
jQuery append() vs appendChild()
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The main difference is that appendChild is a DOM method and append is a jQuery method. The second one uses the first as you can see on jQuery source code
append: function() {
return this.domManip(arguments, true, function( elem ) {
if ( this.nodeType === 1 || this.nod...
Event on a disabled input
Apparently a disabled <input> is not handled by any event
10 Answers
10
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How to write a foreach in SQL Server?
...or-each, where I would like to take the Ids of a returned select statement and use each of them.
10 Answers
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How to remove all the null elements inside a generic list in one go?
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@Mark: I saw the posted seconds and man it was close (32, 33, and 34). ;)
– Lance
Jun 18 '10 at 13:04
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How to check for a JSON response using RSpec?
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You can examine the response object and verify that it contains the expected value:
@expected = {
:flashcard => @flashcard,
:lesson => @lesson,
:success => true
}.to_json
get :action # replace with action name / params...
Exit a Script On Error
...$jar_file. Please recheck the variables 1>&2
exit 1 # terminate and indicate error
fi
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PHP prepend associative array with literal keys?
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See also array_merge() and its difference from using the + operator: br.php.net/manual/en/function.array-merge.php#92602
– Havenard
Sep 3 '09 at 1:33
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URL: Username with @
To send username and password with a URL, we use this scheme:
3 Answers
3
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