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Applying function with multiple arguments to create a new pandas column
...f = 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 function in general case:
>>> def fx(x, y):
...
Take a screenshot of a webpage with JavaScript?
... to build the control in VB6 to take the screenshot. I had to use the keybd_event API call because SendKeys can't do PrintScreen. Here's the code for that:
Declare Sub keybd_event Lib "user32" _
(ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)
Public Const...
Rebasing remote branches in Git
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@r_: Please read my answer. It might help you in your understanding of what you're doing :)
– ralphtheninja
Jun 1 '11 at 19:28
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How do I prevent site scraping? [closed]
...es, these work by extracting data from pages based on patterns in HTML, usually ignoring everything else.
For example: If your website has a search feature, such a scraper might submit a request for a search, and then get all the result links and their titles from the results page HTML, in order t...
Inserting a Link to a Webpage in an IPython Notebook
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For visual learners.
[blue_text](url_here)
Thanks dbliss.
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普通码农和CTO之间的差距，就是这7点了 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...那么我们的沟通能力应该足够我们搞定“萌妹子”的。^_^
学习技术而不是工具
在新框架，新方法，新工具横行的今天我们很难判断出哪些是“技术”，哪些是“工具”。我个人认为程序员不存在——Java程序员、Python程序员、A...
Checking if object is empty, works with ng-show but not from controller?
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Or, if using lo-dash: _.empty(value).
"Checks if value is empty. Arrays, strings, or arguments objects with a length of 0 and objects with no own enumerable properties are considered "empty"."
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Importing a Swift protocol in Objective-C class
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@interface AnalyticFactory : NSObject
{
Class<AnalyticProtocol> _analyticProtocolClass; // The type of the analytic class currently used.
}
In your implementation file (the objC .m file), you can import the Xcode generated Swift header ("ProductModuleName-Swift.h") file and the correct ...
postgresql COUNT(DISTINCT …) very slow
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You can use this:
SELECT COUNT(*) FROM (SELECT DISTINCT column_name FROM table_name) AS temp;
This is much faster than:
COUNT(DISTINCT column_name)
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Add a background image to shape in XML Android
...t;/shape>
</item>
<item android:drawable="@drawable/image_name_here" />
</layer-list>
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