vim – 在变量上使用substitute

我如何在vimscript中完成以下函数？

fun! Foo()
    let l:bar = "Hello there,world!"
    # Perform a substitution on l:bar,changing "world" to "kitten"
endfun

也就是说，如何对变量执行替换，而不是当前缓冲区。

我知道，为了替换缓冲区，我可以写

silent :%s/world/kitten/g

但是什么是等价的命令替换变量？

请参阅：help substitute of：help substitute()。

它是替代命令的对应物(参见：help：substitute)。

substitute({expr},{pat},{sub},{flags})       *substitute()*
 
    The result is a String,which is a copy of {expr},in which
    the first match of {pat} is replaced with {sub}.  This works
    like the ":substitute" command (without any flags).  But the
    matching with {pat} is always done like the 'magic' option is
    set and 'cpoptions' is empty (to make scripts portable).
    'ignorecase' is still relevant.  'smartcase' is not used.
    See |string-match| for how {pat} is used.
    And a "~" in {sub} is not replaced with the prevIoUs {sub}.
    Note that some codes in {sub} have a special meaning
    |sub-replace-special|.  For example,to replace something with
    "\n" (two characters),use "\\\\n" or '\\n'.
    When {pat} does not match in {expr},{expr} is returned
    unmodified.
    When {flags} is "g",all matches of {pat} in {expr} are
    replaced.  Otherwise {flags} should be "".
    Example: >
        :let &path = substitute(&path,",\\=[^,]*$","","")
    This removes the last component of the 'path' option. 
        :echo substitute("testing",".*","\\U\\0","")
    results in "TESTING".

在你的例子我猜让l：bar = substitute(l：bar，“world”，“kitten”，“”)应该工作

vim – 在变量上使用substitute

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