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| -rw-r--r-- | bot/resources/tags/loop-remove.md | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/bot/resources/tags/loop-remove.md b/bot/resources/tags/loop-remove.md index c46cb47ba..0905dc76e 100644 --- a/bot/resources/tags/loop-remove.md +++ b/bot/resources/tags/loop-remove.md @@ -11,16 +11,13 @@ print(data) # [2, 4] <-- every OTHER item was removed! ``` `for` loops track the index of the current item with a kind of pointer. Removing an element causes all other elements to shift, but the pointer is not changed: ```py -# Start the loop: [1, 2, 3, 4] # First iteration: point to the first element ^ [2, 3, 4] # Remove current: all elements shift ^ [2, 3, 4] # Next iteration: move the pointer ^ -[2, 4] # Remove current: all elements shift - ^ -# Done +# and so on ``` You can avoid this pitfall by: - using a list comprehension to produce a new list (as a way of filtering items): |