regex - 匹配和替换两个单词之间的单词

Question

例如，我有这个字符串：

one two three four START four five four five six END seven

我想在其中搜索单词“四”以替换为 REPLACED，这将给出

one two three four START REPLACED five REPLACED five six END seven

我知道这START(.*)END将给出和分隔符之间的单词。我试过START(?<four>)END了，但它什么也没给。

我在 Vbscript 工作。

Answer 1

(?<name>用于命名组。

您需要的是前瞻和后瞻断言来匹配START.*和.*END前置条件和后置条件，而不是实际匹配它们。

Dim input = "one two three four START four five four five six END seven"
Dim output = Regex.Replace(input, "(?<=START.*)four(?=.*END)", "test")

产量：one two three four START test five test five six END seven

Answer 2

为什么要使用正则表达式？

Dim oldStr = "one two three four START four five four five six END seven"

Dim newStr = oldStr.Replace("four", "REPLACED")