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Python Pandas merge only certain columns
...t possible to only merge some columns? I have a DataFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
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How can I find the length of a number?
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var x = 1234567;
x.toString().length;
This process will also work forFloat Number and for Exponential number also.
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What is the canonical way to trim a string in Ruby without creating a new string?
...ble itself if it was stripped.
According to Ruby standards, a method suffixed with an exclamation mark changes the variable in place.
Hope this helps.
Update: This is output from irb to demonstrate:
>> @title = "abc"
=> "abc"
>> @title.strip!
=> nil
>> @title
=> "abc"
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When should I use C++14 automatic return type deduction?
...estion in C and C++03 has been "across statement boundaries we make types explicit, within expressions they are usually implicit but we can make them explicit with casts". C++11 and C++1y introduce type deduction tools so that you can leave out the type in new places.
Sorry, but you're not going to...
Maximum value for long integer
How can I assign the maximum value for a long integer to a variable, similar, for example, to C++'s LONG_MAX .
7 Answers
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How to get the changes on a branch in Git
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In the context of a revision list, A...B is how git-rev-parse defines it. git-log takes a revision list. git-diff does not take a list of revisions - it takes one or two revisions, and has defined the A...B syntax to mean how it's define...
Get Enum from Description attribute [duplicate]
I have a generic extension method which gets the Description attribute from an Enum :
6 Answers
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Why are C character literals ints instead of chars?
...answered Jan 11 '09 at 23:21
MalxMalx
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Mocking python function based on input arguments
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@Ish they're not complaining about the name of CallableMixin.side_effect, but that the separate function defined in the example has the same name.
– OrangeDog
May 8 '18 at 14:54
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Nested classes' scope?
I'm trying to understand scope in nested classes in Python. Here is my example code:
6 Answers
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