Question

我正在尝试删除字符串中的前导和尾随空格但是我正在使用的代码不起作用......如果我在开头或结尾处选择没有空格的目录路径，它仍然有效。我做错了什么？

on run {input, parameters}
    set filePath to input

    set ASTID to AppleScript's AppleScript's text item delimiters
    set AppleScript's text item delimiters to space
    set unwantedSpaces to filePath's text items

    set a to 1
    set b to (count unwantedSpaces)

    repeat while (a < b) and ((count item a of unwantedSpaces) is 0)
        set a to a + 1
    end repeat

    repeat while (b > a) and ((count item b of unwantedSpaces) is 0)
        set b to b - 1
    end repeat

    set strippedText to text from text item a to text item b of filePath
    set AppleScript's AppleScript's text item delimiters to ASTID

    set validFilePaths to {}

    repeat with aLine in strippedText
        try
            set targetAlias to POSIX file aLine as alias
            tell application "Finder" to reveal targetAlias
            set end of validFilePaths to {}

        end try
    end repeat
    return validFilePaths
end run

Answer 1

类似于double_j的answer，但是对于那些降落在这里的人来说......

我经常使用一个简单的子例程，使用echo " str1 " | xargs shell脚本：

on trim(theText)
  return (do shell script "echo \"" & theText & "\" | xargs")
end trim

或因为JavaScript是我在JS＆amp;这样做（即使它非常低效，所以我不会将它用于trim，但是当效率高的时候它可以很快赢得更复杂的东西。＃39; t critical）：

on trim(theText)
  return (do shell script "osascript -l JavaScript -e '\"" & theText & "\".trim()'")
end trim

（也许有一种真正的方式在AppleScript中执行内联JS，但我不确定...... yet）

Answer 2

这是另一种更简单的方法：

on run {input, parameters}
    set filePath to input as text
    set Trimmed_filePath to do shell script "echo " & quoted form of filePath & " | sed -e 's/^[ ]*//' | sed -e 's/[ ]*$//'"
end run

Answer 3

如果您想从字符串中修剪空格，下面的脚本应该这样做。但是，您的变量名称filePath让我相信您的输入是文件路径;）。如果是这种情况，路径的末尾将不会因为名称扩展而被修剪，并且除非您的驱动器名称以空格开头，否则不会修剪路径的开头。如果要查看文件名中的空格，则必须调整脚本。

on run {input, parameters}
    set filePath to (input as text)
    return my trim(filePath, true)
end run

-- From Nigel Garvey's CSV-to-list converter
-- http://macscripter.net/viewtopic.php?pid=125444#p125444
on trim(txt, trimming)
    if (trimming) then
        repeat with i from 1 to (count txt) - 1
            if (txt begins with space) then
                set txt to text 2 thru -1 of txt
            else
                exit repeat
            end if
        end repeat
        repeat with i from 1 to (count txt) - 1
            if (txt ends with space) then
                set txt to text 1 thru -2 of txt
            else
                exit repeat
            end if
        end repeat
        if (txt is space) then set txt to ""
    end if

    return txt
end trim

删除字符串中的前导和尾随空格：AppleScript

3 个答案: