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const getOccurrences = input => input.match(/{{\s*.+?\s*}}/g)
const getOccurrenceProp = occurrence =>  occurrence.replace(/{{\s*|\s*}}/g, '')
const replace = ({ inputHolder, prop, replacer }) => {  const regexBase = `{{${ prop }}}`  const regex = new RegExp(regexBase, 'g')
  return inputHolder.replace(regex, replacer)}
export function interpolate(input, templateInput){  if (arguments.length === 1){    return _templateInput => interpolate(input, _templateInput)  }
  const occurrences = getOccurrences(input)  if (occurrences === null) return input  let inputHolder = input
  for (const occurrence of occurrences){    const prop = getOccurrenceProp(occurrence)
    inputHolder = replace({      inputHolder,      prop,      replacer : templateInput[ prop ],    })  }
  return inputHolder}