function repeatify(string, repetitions) {

   if (repetitions < 0 || repetitions === Infinity) {

      throw new RangeError('Invalid repetitions number');

   }

   let result = '';

   for (let i = 0; i < repetitions; i++) {

      result += string;

   }

   return result;

}

​

function repeatifyWithArrayAndJoin(string, repetitions) {

   if (repetitions < 0 || repetitions === Infinity) {

      throw new RangeError('Invalid repetitions number');

   }

   const result = [];

   for (let i = 0; i < repetitions; i++) {

      result.push(string);

   }

   return result.join('');

}

​

function repeatifyWithNewArray(string, repetitions) {

   if (repetitions < 0 || repetitions === Infinity) {

      throw new RangeError('Invalid repetitions number');

   }

   return new Array(repetitions).join(string);

}

​

function _checkRepeations(repetitions) {

    if (repetitions < 0 || repetitions === Infinity) {

      throw new RangeError('Invalid repetitions number');

   }

}

​

function repeatifyWithNewArrayAndExternalThrow(string, repetitions) {

   _checkRepeations(repetitions);

   return new Array(repetitions).join(string);

}

​

function repeatifyWithNewArrayAndExternalThrowWithProps(string, repetitions) {

   this.checkRepeations(repetitions);

   return new this.Array(repetitions).join(string);

}

​

var ctx = {

    checkRepeations: _checkRepeations,

    Array: Array

}

​

repeatifyWithNewArrayAndExternalThrowWithProps = repeatifyWithNewArrayAndExternalThrowWithProps.bind(ctx);

​

var TEST_STRING = 'home, sweet home';

var COUNT = 1e6;