Does JavaScript have a method like “range()” to generate a range within the supplied bounds?
It works for characters and numbers, going forwards or backwards with an optional step.
It works for characters and numbers, going forwards or backwards with an optional step.
Use On Python 2.x, the sorted function takes its arguments in this order: so without the key=, the function you pass in will be considered a cmp function which takes 2 arguments.
It works for characters and numbers, going forwards or backwards with an optional step. jsFiddle. If augmenting native types is your thing, then assign it to Array.range. Show code snippet
Roughly, partial does something like this (apart from keyword args support etc): So, by calling partial(sum2, 4) you create a new function (a callable, to be precise) that behaves like sum2, but has one positional argument less. That missing argument is always substituted by 4, so that partial(sum2, 4)(2) == sum2(4, 2) As for why it’s needed, there’s a variety of cases. … Read more
There is no native map to the Object object, but how about this: Run code snippet But you could easily iterate over an object using for … in: Run code snippet Update A lot of people are mentioning that the previous methods do not return a new object, but rather operate on the object itself. For that matter I wanted … Read more
Consider a simple function that adds the first N natural numbers. (e.g. sum(5) = 0 + 1 + 2 + 3 + 4 + 5 = 15). Here is a simple JavaScript implementation that uses recursion: If you called recsum(5), this is what the JavaScript interpreter would evaluate: Note how every recursive call has to complete before … Read more
You can read about the changes in What’s New In Python 3.0. You should read it thoroughly when you move from 2.x to 3.x since a lot has been changed. The whole answer here are quotes from the documentation. Views And Iterators Instead Of Lists Some well-known APIs no longer return lists: […] map() and filter() return iterators. If … Read more