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Merge pull request #6051 from couven92/alignLeft

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Add left-aligning string proc to strutils
This commit is contained in:
Dominik Picheta
2017-10-22 23:11:13 +01:00
committed by GitHub
parent 7db5414d18 177a634992
commit ecfbe4940b
1 changed files with 29 additions and 2 deletions
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31
lib/pure/strutils.nim
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@@ -1062,8 +1062,8 @@ proc align*(s: string, count: Natural, padding = ' '): string {.
##
## `padding` characters (by default spaces) are added before `s` resulting in
## right alignment. If ``s.len >= count``, no spaces are added and `s` is
## returned unchanged. If you need to left align a string use the `repeatChar
## proc <#repeatChar>`_. Example:
## returned unchanged. If you need to left align a string use the `alignLeft
## proc <#alignLeft>`_. Example:
##
## .. code-block:: nim
## assert align("abc", 4) == " abc"
@@ -1078,6 +1078,28 @@ proc align*(s: string, count: Natural, padding = ' '): string {.
else:
result = s
proc alignLeft*(s: string, count: Natural, padding = ' '): string {.noSideEffect.} =
## Left-Aligns a string `s` with `padding`, so that it is of length `count`.
##
## `padding` characters (by default spaces) are added after `s` resulting in
## left alignment. If ``s.len >= count``, no spaces are added and `s` is
## returned unchanged. If you need to right align a string use the `align
## proc <#align>`_. Example:
##
## .. code-block:: nim
## assert alignLeft("abc", 4) == "abc "
## assert alignLeft("a", 0) == "a"
## assert alignLeft("1232", 6) == "1232 "
## assert alignLeft("1232", 6, '#') == "1232##"
if s.len < count:
result = newString(count)
if s.len > 0:
result[0 .. (s.len - 1)] = s
for i in s.len ..< count:
result[i] = padding
else:
result = s
iterator tokenize*(s: string, seps: set[char] = Whitespace): tuple[
token: string, isSep: bool] =
## Tokenizes the string `s` into substrings.
@@ -2325,6 +2347,11 @@ when isMainModule:
doAssert align("1232", 6) == " 1232"
doAssert align("1232", 6, '#') == "##1232"
doAssert alignLeft("abc", 4) == "abc "
doAssert alignLeft("a", 0) == "a"
doAssert alignLeft("1232", 6) == "1232 "
doAssert alignLeft("1232", 6, '#') == "1232##"
let
inp = """ this is a long text -- muchlongerthan10chars and here
it goes"""