replace string value with variable

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

Sorry just gonna dump a link diveintojavascript.com/projects/javascript-sprintf — Tomas
– Tomas, Commented Jan 23, 2015 at 20:02
could you not provide a key for each string as well ? then replace by key? Loop over arrays and replace each key — charlietfl
– charlietfl, Commented Jan 23, 2015 at 20:04

elclanrs · Accepted Answer · 2015-01-23 20:04:32Z

3

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))

answered Jan 23, 2015 at 20:04

elclanrs

94.2k21 gold badges137 silver badges171 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

mcgrailm Over a year ago

I think this will get me where I'm going , thank you for prompt answer

mcgrailm Over a year ago

quick question what if i don't have all the variables in a nice neat object

elclanrs Over a year ago

@mcgrailm, I'd just put them in an object, in ES6 there's even a shortcut for that {a:a,b:b,c:c} === {a,b,c}

Collectives™ on Stack Overflow

replace string value with variable

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related