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Applying function with multiple arguments to create a new pandas column
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>>> import numpy as np
>>> df = pd.DataFrame({"A": [10,20,30], "B": [20, 30, 10]})
>>> df['new_column'] = np.multiply(df['A'], df['B'])
>>> df
A B new_column
0 10 20 200
1 20 30 600
2 30 10 300
or vectorize arbitrary functi...
Quick easy way to migrate SQLite3 to MySQL? [closed]
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62
Here is a list of converters (not updated since 2011):
https://www2.sqlite.org/cvstrac/wiki?p=...
In log4j, does checking isDebugEnabled before logging improve performance?
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252
In this particular case, Option 1 is better.
The guard statement (checking isDebugEnabled()) ...
How do you keep parents of floated elements from collapsing? [duplicate]
...float: left;">Div 1</div>
<div style="float: left;">Div 2</div>
</div>
CSS:
.clearfix::after {
content: " ";
display: block;
height: 0;
clear: both;
}
With a little CSS targeting, you don't even need to add a class to the parent DIV.
This so...
Best way to store a key=>value array in JavaScript?
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That's just what a JavaScript object is:
var myArray = {id1: 100, id2: 200, "tag with spaces": 300};
myArray.id3 = 400;
myArray["id4"] = 500;
You can loop through it using for..in loop:
for (var key in myArray) {
console.log("key " + key + " has value " + myArray[key]);
}
See also: Workin...
Is it safe to resolve a promise multiple times?
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120
As I understand promises at present, this should be 100% fine. Only thing to understand is that...
minimize app to system tray
I have a Windows forms app powered by C# and Visual Studio 2010.
9 Answers
9
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how to listen to N channels? (dynamic select statement)
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edited Feb 29 at 11:09
Zac
31744 silver badges1313 bronze badges
answered Nov 15 '13 at 2...
What is the best open-source java charting library? (other than jfreechart) [closed]
... community wiki
3 revs, 2 users 94%Julien Chastang
11
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Does my application “contain encryption”?
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222
[UPDATE: Using HTTPS is now exempt from the ERN as of late September, 2016]
https://stackoverf...