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comparison runtime/doc/eval.txt @ 26638:6fd15d82e898 v8.2.3848

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patch 8.2.3848: cannot use reduce() for a string Commit: https://github.com/vim/vim/commit/0ccb5842f5fb103763d106c7aa364d758343c35a Author: rbtnn <naru123456789@gmail.com> Date: Sat Dec 18 18:33:46 2021 +0000 patch 8.2.3848: cannot use reduce() for a string Problem: Cannot use reduce() for a string. Solution: Make reduce() work with a string. (Naruhiko Nishino, closes https://github.com/vim/vim/issues/9366)
author Bram Moolenaar <Bram@vim.org>
date Sat, 18 Dec 2021 19:45:03 +0100
parents 3a63b1e4a6f4
children 7c055fdd6200
comparison
equal deleted inserted replaced
26637:eeac85e187e7 26638:6fd15d82e898
8957 Can also be used as a |method|: > 8957 Can also be used as a |method|: >
8958 GetFileName()->readfile() 8958 GetFileName()->readfile()
8959 8959
8960 reduce({object}, {func} [, {initial}]) *reduce()* *E998* 8960 reduce({object}, {func} [, {initial}]) *reduce()* *E998*
8961 {func} is called for every item in {object}, which can be a 8961 {func} is called for every item in {object}, which can be a
8962 |List| or a |Blob|. {func} is called with two arguments: the 8962 |String|, |List| or a |Blob|. {func} is called with two arguments:
8963 result so far and current item. After processing all items 8963 the result so far and current item. After processing all
8964 the result is returned. 8964 items the result is returned.
8965 8965
8966 {initial} is the initial result. When omitted, the first item 8966 {initial} is the initial result. When omitted, the first item
8967 in {object} is used and {func} is first called for the second 8967 in {object} is used and {func} is first called for the second
8968 item. If {initial} is not given and {object} is empty no 8968 item. If {initial} is not given and {object} is empty no
8969 result can be computed, an E998 error is given. 8969 result can be computed, an E998 error is given.
8970 8970
8971 Examples: > 8971 Examples: >
8972 echo reduce([1, 3, 5], { acc, val -> acc + val }) 8972 echo reduce([1, 3, 5], { acc, val -> acc + val })
8973 echo reduce(['x', 'y'], { acc, val -> acc .. val }, 'a') 8973 echo reduce(['x', 'y'], { acc, val -> acc .. val }, 'a')
8974 echo reduce(0z1122, { acc, val -> 2 * acc + val }) 8974 echo reduce(0z1122, { acc, val -> 2 * acc + val })
8975 echo reduce('xyz', { acc, val -> acc .. ',' .. val })
8975 < 8976 <
8976 Can also be used as a |method|: > 8977 Can also be used as a |method|: >
8977 echo mylist->reduce({ acc, val -> acc + val }, 0) 8978 echo mylist->reduce({ acc, val -> acc + val }, 0)
8978 8979
8979 8980