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| -rw-r--r-- | bot/resources/tags/range-len.md | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/bot/resources/tags/range-len.md b/bot/resources/tags/range-len.md new file mode 100644 index 000000000..b1c973647 --- /dev/null +++ b/bot/resources/tags/range-len.md @@ -0,0 +1,19 @@ +Iterating over `range(len(...))` is a common approach to accessing each item +in an ordered collection. + +```py +for i in range(len(my_list)): + do_something(my_list[i]) +``` + +The pythonic syntax is much simpler, and is +guaranteed to produce elements in the same order: + +```py +for item in my_list: + do_something(item) +``` + +Python has other solutions for cases when the index itself might be needed. +To get the element at the same index from two or more lists, use [zip](https://docs.python.org/3/library/functions.html#zip). +To get both the index and the element at that index, use [enumerate](https://docs.python.org/3/library/functions.html#enumerate). |