map-function Archives

Programming, Python

IT Nursery

Are list-comprehensions and functional functions faster than “for loops”?

In terms of performance in Python, is a list-comprehension, or functions like map(), filter() and reduce() faster than a for loop? Why, technically, ...

May 30, 2022
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Is there a difference between foreach and map?

Ok this is more of a computer science question, than a question based on a particular language, but is there a difference between ...

May 24, 2022
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JavaScript “new Array(n)” and “Array.prototype.map” weirdness

I’ve observed this in Firefox-3.5.7/Firebug-1.5.3 and Firefox-3.6.16/Firebug-1.6.2 When I fire up Firebug: var x = new Array(3) console.log(x) //...

May 18, 2022
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Mapping over values in a python dictionary

Given a dictionary { k1: v1, k2: v2 ... } I want to get { k1: f(v1), k2: f(v2) ... } provided I ...

May 16, 2022
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Understanding the map function

map(function, iterable, ...) Apply function to every item of iterable and return a list of the results. If additional iterable arguments are passed, ...

May 13, 2022
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Getting a map() to return a list in Python 3.x

I’m trying to map a list into hex, and then use the list elsewhere. In python 2.6, this was easy: A: Python 2.6: ...

April 29, 2022
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List comprehension vs map

Is there a reason to prefer using map() over list comprehension or vice versa? Is either of them generally more efficient or considered ...

April 19, 2022
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map function for objects (instead of arrays)

I have an object: myObject = { 'a': 1, 'b': 2, 'c': 3 } I am looking for a native method, similar to ...

April 12, 2022
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