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python pandas dataframe to dictionary
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12 Answers
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What happens if I define a 0-size array in C/C++?
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An array cannot have zero size.
ISO 9899:2011 6.7.6.2:
If the expression is a constant expression, it shall have a value greater than zero.
The above text is true both for a plain array (paragraph 1). For a VLA (variable length array), the behavior is undefined ...
Define variable to use with IN operator (T-SQL)
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What kind of Garbage Collection does Go use?
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Plans for Go 1.4+ garbage collector:
hybrid stop-the-world/concurrent collector
stop-the-wor...
Storing R.drawable IDs in XML array
...le within your /res/values folder that looks like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<integer-array name="random_imgs">
<item>@drawable/car_01</item>
<item>@drawable/balloon_random_02</item>
<item>@dr...
Abusing the algebra of algebraic data types - why does this work?
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Disclaimer: A lot of this doesn't really work quite right when you account for ⊥, so I'm goi...
Efficient way to determine number of digits in an integer
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Well, the most efficient way, presuming you know the size of the integer, would be a lookup. ...
How to combine multiple conditions to subset a data-frame using “OR”?
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my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | data$V2 < 4) , ]
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Text Progress Bar in the Console [closed]
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31 Answers
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Python: using a recursive algorithm as a generator
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def getPermutations(string, prefix=""):
if len(string) == 1:
yield prefix + string...