Question

我有一个看起来像这样的字符串：

{theField} > YEAR (today, -3) || {theField}  < YEAR (today, +3)

我希望将其替换为：

{theField} > " + YEAR (today, -3) + " || {theField}  < " + YEAR (today, +3) + "

我试过这个：

String.replace(/(.*)(YEAR|MONTH|WEEK|DAY+)(.*[)]+)/g, "$1 \" + $2 $3 + \"")

但这给了我：

{theField} > YEAR (today, +3) || {theField}  >  " + YEAR  (today, +3) + "

有没有人有任何想法？

Answer 1

当你.*时，你应该小心使用贪婪的匹配。通常这不会做你想要的 - 它尽可能多地匹配字符串。您需要使用否定字符类才能在达到某个字符时停止匹配（例如[^)]），或者使用lazy匹配.*?。以下是使用惰性量词的方法：

s = '{theField} > YEAR (today, -3) || {theField}  < YEAR (today, +3)';
result = s.replace(/((YEAR|MONTH|WEEK|DAY).*?\))/g, '" + $1 + "')

结果：

{theField} > " + YEAR (today, -3) + " || {theField}  < " + YEAR (today, +3) + "

请注意，我在正则表达式中清理了一点：