[ Codecademy ] lodash

const _ = {
  clamp (number, lower, upper) {
  const lowerClampedValue =  Math.max(number, lower);
  const clampedValue  =  Math.min(lowerClampedValue, upper);
  return clampedValue ;
},
  inRange(number, start, end) {
    if ( end === undefined ) {
      end = start; 
      start = 0;
    } 
    if ( start > end ) {
      const temp = end
      end = start ;
     start = temp;
    }
    const isInRange = 
    start <= number && number < end; return isInRange ;
  },

  words (string) {
    const words = string.split(' ') ; return words
  },
  pad (string, length) {
    if (string.length >= length) {
      return string;
    } 
    const startPaddingLength =
    Math.floor((length-string.length) /2) ;
    const endPaddingLength =
    length - string.length - startPaddingLength ;
    const paddedString =
     ' '.repeat(startPaddingLength) + string + ' '.repeat(endPaddingLength);
    return paddedString ;
},
  has (object, key) {
    const hasValue = object[key] ;
    if (hasValue != undefined ) 
      {return true;} return false;
    },
    invert (object) {
    const invertedObject = {};
    for (let key in object) {
      const originalValue = object[key];
      invertedObject[originalValue] = key;
    } return invertedObject;
  },
    findKey (object, predicate) {
    for (let key in object) {
      const value = object[key];
      const predicateReturnValue = predicate(value);
      if (predicateReturnValue) return key;
    } return undefined;
    },
    drop (array, n) {
    if ( typeof(n) === 'undefined') {
      n = 1
    } const droppedArray = array.slice(n);
      return droppedArray ;
    },
    dropWhile(array, predicate) {
        const cb = (element, index) => {
            return !predicate(element, index, array);
        }
        let dropNumber = array.findIndex(cb);
        let droppedArray = this.drop(array, dropNumber);
        return droppedArray;
      },
    chunk(array, size) {
    if (size === undefined) {
      size = 1; } 
    const arrayChunks = [];
    for (let i=0; i< array.length; i+= size) {
    const arrayChunk = array.slice(i, i+size);
    arrayChunks.push(arrayChunk);
    } return arrayChunks;
    },
    
};


// Do not write or modify code below this line.
module.exports = _;