用变量替换字符串值

Question

I have an array of strings, within each string I want to call a variable

Strings = ["$username thanks for visiting","Thanks $username, but I don't understand the command $userProvidedCommand"]

now I know I can use string replace

msg.replace('$username', userame)

however I don't want to write a string replace for every possibility.

what would be ideal , I think. would be to have have some sort of pattern replacement where it looks for the $ and breaks the string up and concatenates it back together with the variable.

Is there a way to do that, or maybe there is a better solution ?

thanks

Answer 1

You can do it with regular expressions:

var data = {
  username: 'peterpan',
  userProvidedCommand: 'mycommand'
}

var format = function(data, str) {
  return str.replace(/\$(\w+)/g, function(_, m) {
    return data[m] || ''
  })
}

var result = strings.map(format.bind(null, data))