Question

给出要从字符串中提取的值（其中每个值都由起始字符和结束字符包围），最有效的方法是什么？

例如，要获取包含值的数组：a b c

$mystring = "=a; =b; =c;"
$CharArray = $mystring.Split("=").Split(";")

Answer 1

有许多-replace，-split，.Split()和.Replace()的组合可用于此任务。以下是一些示例：

# Since each element is separated by a space, you can replace extraneous characters first
# -split operator alone splits by a space character
# This can have issues if your values contain spaces too
($mystring -replace '=|;').Split(' ')
-split ($mystring -replace '=|;')

# Since splitting creates white space at times, `Trim()` handles that.
# Because you expect an array after splitting, -ne '' will only return non-empty elements
$mystring.Split("=").Split(";").Trim() -ne ''

# Creates a array of of System.Char elements. Take note of the type here as it may not be what you want.
($mystring -replace ' ?=|;').ToCharArray()

# Uses Split(String[], StringSplitOptions) method
($myString -replace ' ?=').Split(';',[StringSplitOptions]::RemoveEmptyEntries)

Answer 2

大卫，您看起来不错，但是这里还有另一种方法。 -replace方法处理空格（“”）和等号（=）。

$mystring = "=a; =b; =c;"
$CharArray = $mystring -split ";" -replace " |=",""

Powershell通过开始和结束字符将字符串拆分为数组

2 个答案: