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How to keep index when using pandas merge
...rge(b, how="left").set_index('index')
Out[5]:
col1 to_merge_on col2
index
a 1 1 1
b 2 3 2
c 3 4 NaN
Note that for some left merge operations, you may end up with more rows than in a when there are multiple matches between a...
how to permit an array with strong parameters
..._ids are passed to the create action in an array
"category_ids"=>["", "2"],
Therefore, when declaring strong parameters, I explicitly set category_ids to be an array
params.require(:question).permit(:question_details, :question_content, :user_id, :accepted_answer_id, :province_id, :city, :cat...
Difference between / and /* in servlet mapping url pattern
...
271
<url-pattern>/*</url-pattern>
The /* on a servlet overrides all other servlets, in...
Proper way to rename solution (and directories) in Visual Studio
I have a rather involved Visual Studio solution (2010, but it shouldn't matter) that I need to rename.
18 Answers
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Difference between passing array and array pointer into function in C
...eters treated as though they were declared as pointers? Here's why:
6.3.2.1 Lvalues, arrays, and function designators
...
3 Except when it is the operand of the sizeof operator or the unary & operator, or is a
string literal used to initialize an array, an expression that has type ‘‘array...
What does '
...
238
It's a shorthand for <?php echo $a; ?>.
It's enabled by default since 5.4 regardless of...
How can I read a function's signature including default argument values?
... |
edited Nov 30 '17 at 12:17
answered Apr 20 '10 at 17:29
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Link to the issue number on GitHub within a commit message
... message to reference an issue without closing it.
With new GitHub issues 2.0 you can use these synonyms to reference an issue and close it (in your commit message):
fix #xxx
fixes #xxx
fixed #xxx
close #xxx
closes #xxx
closed #xxx
resolve #xxx
resolves #xxx
resolved #xxx
You can also substitut...
CSS: Control space between bullet and
...t;<span>item 1</span></li>
<li><span>item 2</span></li>
<li><span>item 3</span></li>
</ul>
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