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Advantages of stateless programming?
I've recently been learning about functional programming (specifically Haskell, but I've gone through tutorials on Lisp and Erlang as well). While I found the concepts very enlightening, I still don't see the practical side of the "no side effects" concept. What are the practical advantages of it? ...
Adding a column to a data.frame
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@RomanLuštrik, This solution can be rewritten really nicely in a single line. Using your your.df data, you can simply do your.df$group = cumsum(your.df[, 1]==1) to get your new group column.
– A5C1D2H2I1M1N2O1R2T1
Apr 16 '12 at 17:47
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Turn Pandas Multi-Index into column
...he parameter is drop=False (which will keep the index values as columns).
All you have to do add .reset_index(inplace=True) after the name of the DataFrame:
df.reset_index(inplace=True)
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How does UTF-8 “variable-width encoding” work?
... standard has enough code-points in it that you need 4 bytes to store them all. That's what the UTF-32 encoding does. Yet the UTF-8 encoding somehow squeezes these into much smaller spaces by using something called "variable-width encoding".
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Python - json without whitespaces
... indent=0 generates newlines, while indent=None (default) does not in 2.7. All is clearly stated at: docs.python.org/3/library/json.html#json.dump
– Ciro Santilli 郝海东冠状病六四事件法轮功
Jul 28 '16 at 14:01
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Why does jQuery or a DOM method such as getElementById not find the element?
...ts from top to bottom. Elements are added to the DOM and scripts are (generally) executed as they're encountered. This means that order matters. Typically, scripts can't find elements which appear later in the markup because those elements have yet to be added to the DOM.
Consider the following mar...
How to mock void methods with Mockito
... Object[] args = invocation.getArguments();
System.out.println("called with arguments: " + Arrays.toString(args));
return null;
}
}).when(mockWorld).setState(anyString());
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Generate fixed length Strings filled with whitespaces
... is a String and 15 represents the minimal width of the String.
Putting it all together: "%1$15s".
For a general method we have:
public static String fixedLengthString(String string, int length) {
return String.format("%1$"+length+ "s", string);
}
Maybe someone can suggest another format str...
Border around tr element doesn't show?
...llapse: collapse;
}
JSFiddle.
The reason why it behaves this way is actually described pretty well in the specification:
There are two distinct models for setting borders on table cells in
CSS. One is most suitable for so-called separated borders around
individual cells, the other is suit...
How to keep a git branch in sync with master
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You will have quite a few "merge commits", essentially git trying to resolve differences between your branches. if you're worried about that AND you're the only one using the branch then do a "git rebase master" instead of a "git merge master" AND DO NOT PUSH THE COMMITS TO ...