Reverse a string except for the characters contained within { } with javascript-CodePudding

I need to reverse a string except the characters inside of "{}". I know how to reverse a string but I'm not sure how to create the exception. Please help.

 function reverseChar(string2){
    let string2Array = string2.split('');
    let newArray = [];
  
    for(let x = string2Array.length-1; x >= 0; x--){
      newArray.push(string2Array[x])
    }
    console.log(newArray)

}
reverseChar("ab{cd}efg")
reverseChar("ab{cd}ef{gh}i")

CodePudding user response：

Or, maybe, this is what you want?

function reverse(str) {
  return str.split("").reverse().join("").replace(/}\w \{/g,a=>reverse(a))
}

console.log(reverse("ab{cd}efg"))
console.log(reverse("ab{cd}ef{gh}i"))

CodePudding user response：

You can try this logic:

Get all the parts
If the part does not have special character, reverse it and set it.
Reverse the parts array
Join all the parts back and return it

function reverseChar(string2) {
  const regex = /(\w (?=\{|$)|\{\w \})/g
  return string2.match(regex)
    .map((str) => /\{/.test(str) ? str : str.split("").reverse().join(""))
    .reverse()
    .join("")
}
console.log(reverseChar("ab{cd}efg"))
console.log(reverseChar("ab{cd}ef{gh}i"))