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patch 8.2.2658: :for cannot loop over a string

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Problem:    :for cannot loop over a string.
Solution:   Accept a string argument and iterate over its characters.
This commit is contained in:
Bram Moolenaar
2021-03-26 20:41:29 +01:00
parent 522eefd9a2
commit 74e54fcb44
9 changed files with 164 additions and 33 deletions
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14
runtime/doc/eval.txt
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@@ -439,8 +439,8 @@ Changing the order of items in a list: >
For loop ~
The |:for| loop executes commands for each item in a list. A variable is set
to each item in the list in sequence. Example: >
The |:for| loop executes commands for each item in a List, String or Blob.
A variable is set to each item in sequence. Example with a List: >
:for item in mylist
: call Doit(item)
:endfor
@@ -457,7 +457,7 @@ If all you want to do is modify each item in the list then the |map()|
function will be a simpler method than a for loop.
Just like the |:let| command, |:for| also accepts a list of variables. This
requires the argument to be a list of lists. >
requires the argument to be a List of Lists. >
:for [lnum, col] in [[1, 3], [2, 8], [3, 0]]
: call Doit(lnum, col)
:endfor
@@ -473,6 +473,14 @@ It is also possible to put remaining items in a List variable: >
: endif
:endfor
For a Blob one byte at a time is used.
For a String one character, including any composing characters, is used as a
String. Example: >
for c in text
echo 'This character is ' .. c
endfor
List functions ~
*E714*