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python pandas: Remove duplicates by columns A, keeping the row with the highest value in column B
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201
This takes the last. Not the maximum though:
In [10]: df.drop_duplicates(subset='A', keep="las...
Display filename before matching line
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edited May 18 '17 at 18:10
MD XF
6,77277 gold badges3131 silver badges6060 bronze badges
answered Mar 1...
Getting indices of True values in a boolean list
...t;>> list(compress(xrange(len(t)), t))
[4, 5, 7]
>>> t = t*1000
>>> %timeit [i for i, x in enumerate(t) if x]
100 loops, best of 3: 2.55 ms per loop
>>> %timeit list(compress(xrange(len(t)), t))
1000 loops, best of 3: 696 µs per loop
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How can I store my users' passwords safely?
...ecure (if not the only) available option.
The new PHP password API (5.5.0+)
If you are using PHP version 5.5.0 or newer, you can use the new simplified password hashing API
Example of code using PHP's password API:
<?php
// $hash is what you would store in your database
$hash = password_has...
Professional jQuery based Combobox control? [closed]
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answered Oct 13 '08 at 2:12
Elijah ManorElijah Manor
17.5k1616 gold badges6969 silver badges7979 bronze badges
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Could not execute editor
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answered Nov 4 '10 at 11:25
Rob WilkersonRob Wilkerson
36.7k4141 gold badges126126 silver badges182182 bronze badges
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The import javax.servlet can't be resolved [duplicate]
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You need to add the Servlet API to your classpath. In Tomcat 6.0, this is in a JAR called servlet-api.jar in Tomcat's lib folder. You can either add a reference to that JAR to the project's classpath, or put a copy of the JAR in your Eclipse project and add it to the classpath from there...
Git: add vs push vs commit
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered May 26 '11 at 18:28
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Taskkill /f doesn't kill a process
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edited Oct 15 '13 at 13:09
LaurentG
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answered O...
difference between width auto and width 100 percent
...he widths of those do not add to the total width of the element.
Width 100%
On the other hand, if you specify width:100%, the element’s total width will be 100% of its containing block plus any horizontal margin, padding and border (unless you’ve used box-sizing:border-box, in which case ...