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patch 8.2.0868: trim() always trims both ends

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Problem:    trim() always trims both ends.
Solution:   Add an argument to only trim the beginning or end. (Yegappan
            Lakshmanan, closes #6126)
This commit is contained in:
Bram Moolenaar
2020-05-31 22:20:36 +02:00
parent fccd93f091
commit 2245ae18e3
4 changed files with 84 additions and 38 deletions
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22
runtime/doc/eval.txt
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@@ -2898,7 +2898,8 @@ tolower({expr}) String the String {expr} switched to lowercase
toupper({expr}) String the String {expr} switched to uppercase
tr({src}, {fromstr}, {tostr}) String translate chars of {src} in {fromstr}
to chars in {tostr}
trim({text} [, {mask}]) String trim characters in {mask} from {text}
trim({text} [, {mask} [, {dir}]])
String trim characters in {mask} from {text}
trunc({expr}) Float truncate Float {expr}
type({name}) Number type of variable {name}
undofile({name}) String undo file name for {name}
@@ -10245,13 +10246,22 @@ tr({src}, {fromstr}, {tostr}) *tr()*
Can also be used as a |method|: >
GetText()->tr(from, to)
trim({text} [, {mask}]) *trim()*
trim({text} [, {mask} [, {dir}]]) *trim()*
Return {text} as a String where any character in {mask} is
removed from the beginning and end of {text}.
removed from the beginning and/or end of {text}.
If {mask} is not given, {mask} is all characters up to 0x20,
which includes Tab, space, NL and CR, plus the non-breaking
space character 0xa0.
This code deals with multibyte characters properly.
The optional {dir} argument specifies where to remove the
characters:
0 remove from the beginning and end of {text}
1 remove only at the beginning of {text}
2 remove only at the end of {text}
When omitted both ends are trimmed.
This function deals with multibyte characters properly.
Examples: >
echo trim(" some text ")
@@ -10259,7 +10269,9 @@ trim({text} [, {mask}]) *trim()*
echo trim(" \r\t\t\r RESERVE \t\n\x0B\xA0") . "_TAIL"
< returns "RESERVE_TAIL" >
echo trim("rm<Xrm<>X>rrm", "rm<>")
< returns "Xrm<>X" (characters in the middle are not removed)
< returns "Xrm<>X" (characters in the middle are not removed) >
echo trim(" vim ", " ", 2)
< returns " vim"
Can also be used as a |method|: >
GetText()->trim()