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How to write to an existing excel file without overwriting data (using pandas)?
I use pandas to write to excel file in the following fashion:
11 Answers
11
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Inline instantiation of a constant List
...ble<string> would probably be most appropriate. If the order matters and you want people to be able to access it by index, IList<T> may be appropriate. If you want to make the immutability apparent, declaring it as ReadOnlyCollection<T> could be handy - but inflexible.
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Start may not be called on a promise-style task. exception is coming
I am creating a simple wpf desktop application. UI have just a button and code in .cs file like.
3 Answers
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Make a link in the Android browser start up my app?
... scheme. Something along the lines of:
<intent-filter>
<data android:scheme="anton" />
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABL...
Detecting taps on attributed text in a UITextView in iOS
...an perform an action. I realise that UITextView can detect taps on a URL and call back my delegate, but these aren't URLs.
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What is an .axd file?
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from Google
An .axd file is a HTTP Handler file. There are two types of .axd files.
ScriptResource.axd
WebResource.axd
These are files which are generated at runtime whenever you use ScriptManager in your Web app. This is being generated only once when you ...
Invalid postback or callback argument. Event validation is enabled using '
...e cost).
Use ASP.NET Ajax UpdatePanel. (Put the listbox in the Updatepanel and trigger a update, if you add or remove listbox. This way viewstate and related fields get updates and eventvalidation will pass.)
Forget client-side and use the classic postback and add or remove the listitems server-side...
How to change the default GCC compiler in Ubuntu?
...n ubuntu 11.04 which already has gcc/g++-4.4. So in my system both gcc-3.3 and 4.4 are available. I am able to call both compilers as I want. If I just call the command gcc then gcc-4.4 will get called. To call gcc-3.3, I have to use the command gcc-3.3 .
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Find the max of two or more columns with pandas
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You can get the maximum like this:
>>> import pandas as pd
>>> df = pd.DataFrame({"A": [1,2,3], "B": [-2, 8, 1]})
>>> df
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]]
A B
0 1 -2
1 2 8
2 3 1
>>> df[["A", "B"]].max(axis=1)
0...
How to create a private class method?
... disgusting it is definitely not.
It makes perfect sense once you understand Ruby's object model and the corresponding method lookup flow, especially when taking into consideration that private is NOT an access/visibility modifier, but actually a method call (with the class as its recipient) as di...