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How to form tuple column from two columns in Pandas
I've got a Pandas DataFrame and I want to combine the 'lat' and 'long' columns to form a tuple.
4 Answers
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javascript: recursive anonymous function?
Let's say I have a basic recursive function:
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How to create multidimensional array
Can anyone give me a sample/example of JavaScript with a multidimensional array of inputs? Hope you could help because I'm still new to the JavaScript.
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Change Active Menu Item on Page Scroll?
As you scroll down the page, the active menu item changes. How is this done?
4 Answers
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How can I add a box-shadow on one side of an element?
I need to create a box-shadow on some block element, but only (for example) on its right side. The way I do it is to wrap the inner element with box-shadow into an outer one with padding-right and overflow:hidden; so the three other sides of the shadow are not visible.
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Is there a standard sign function (signum, sgn) in C/C++?
I want a function that returns -1 for negative numbers and +1 for positive numbers.
http://en.wikipedia.org/wiki/Sign_function
It's easy enough to write my own, but it seems like something that ought to be in a standard library somewhere.
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Memoization in Haskell?
Any pointers on how to solve efficiently the following function in Haskell, for large numbers (n > 108)
8 Answers
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How to create the most compact mapping n → isprime(n) up to a limit N?
Naturally, for bool isprime(number) there would be a data structure I could query.
I define the best algorithm , to be the algorithm that produces a data structure with lowest memory consumption for the range (1, N], where N is a constant.
Just an example of what I am looking for: I could rep...
Detect if value is number in MySQL
Is there a way to detect if a value is a number in a MySQL query? Such as
15 Answers
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What's the fastest way to loop through an array in JavaScript?
I learned from books that you should write for loop like this：
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