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222 lines (187 loc) · 4.93 KB
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function firstLetter(inputString) {
if (inputString === undefined) {
return inputString;
} else{
return inputString[0];
}
}
function lastLetter(inputString) {
if (inputString === undefined) {
return inputString;
} else{
return inputString[inputString.length -1];
}
}
function letterAtPosition(inputString, position) {
if (inputString === undefined) {
return inputString;
} else{
return inputString[position];
}
}
function addTwoNumbers(num1, num2) {
if (isNaN(num1) || isNaN(num2)){
return undefined;
} else {
return num1 + num2;
}
}
function multiplyTwoNumbers(num1, num2) {
if (isNaN(num1) || isNaN(num2)){
return undefined;
} else {
return num1 * num2;
}
}
function calculator(operation, num1, num2) {
switch (operation) {
case 'add':
return num1 + num2;
case 'sub':
return num1 - num2;
case 'mult':
return num1 * num2;
case 'div':
return num1/num2;
default:
return undefined;
}
}
function repeatString(inputString, numRepetitions) {
if (typeof(inputString) !== 'string') {
return undefined;
}
else if (numRepetitions <= 0) {
return '';
}
else {
var v = '';
for (var i = 0; i < numRepetitions; i++) {
v += inputString;
}
return v;
}
}
function reverseString(inputString) {
var str = '';
for (var i = inputString.length -1; i >= 0; i--){
str += inputString[i];
}
return str;
}
function longestWord(inputString) {
if(inputString === ''){
return '';
}
else if (typeof(inputString) === 'string') {
var array = inputString.split(' ');
var longest = 0;
for (var i = 0; i < array.length; i++){
if (array[i].length > longest){
longest = array[i];
}
}
}
return array[longest -1];
}
function capitalize(inputString) {
if(inputString === ''){
return '';
}
else if (typeof(inputString) === 'string') {
inputString = inputString.toLowerCase().split(' ');
for(var i = 0; i < inputString.length; i++){
inputString[i] = inputString[i].split('');
inputString[i][0] = inputString[i][0].toUpperCase();
inputString[i] = inputString[i].join('');
}
return inputString.join(' ');
}
}
function sumOfNumbers(arrayOfNumbers) {
var sum = 0;
if (arrayOfNumbers === undefined){
return undefined;
}
else {
for ( var i = 0; i < arrayOfNumbers.length; i++){
if (arrayOfNumbers === []){
return 0;
}
else if (typeof(arrayOfNumbers[i]) === 'number'){
sum += arrayOfNumbers[i];
}
else if (typeof arrayOfNumbers[i] !== 'number'){
return undefined;
}
}
return sum;
}
}
function uniqueElements(array1, array2) {
var result = [];
var match;
if (Array.isArray(array1) && Array.isArray(array2)){
for (var i = 0; i < array1.length; i++){
match = false;
for (var j = 0; j < array2.length; j++){
if (array1[i] === array2[j]) {
match = true;
}
}
if (!match){
result.push(array1[i]);
}
}
for (var s = 0; s < array2.length; s++){
match = false;
for (var t = 0; t < array1.length; t++){
if (array2[s] === array1[t]) {
match = true;
}
}
if (!match){
result.push(array2[s]);
}
}
return result;
}
else {
return undefined;
}
}
function isPalindrome(inputString) {
var erase = /[\W_]/g;
var str = inputString.toLowerCase().replace(erase, '');
var reverseStr = str.split('').reverse().join('');
return str === reverseStr;
}
//console.log(isPalindrome('RADAR'));
//console.log(isPalindrome('JAVASCRIPT'));
//console.log(isPalindrome('ABLE WAS I ERE I SAW ELBA'));
//console.log(isPalindrome("MADAM I'M ADAM"));
function wrapCharacter(inputString) {
}
function wrapWord(inputString) {
}
function bubbleSort(arrayOfNumbers) {
}
/***** DO NOT EDIT AFTER THIS LINE *****/
module.exports = {
firstLetter: firstLetter,
lastLetter: lastLetter,
letterAtPosition: letterAtPosition,
addTwoNumbers: addTwoNumbers,
multiplyTwoNumbers: multiplyTwoNumbers,
calculator: calculator,
repeatString: repeatString,
reverseString: reverseString,
longestWord: longestWord,
capitalize: capitalize,
sumOfNumbers: sumOfNumbers,
uniqueElements: uniqueElements,
isPalindrome: isPalindrome,
wrapCharacter: wrapCharacter,
wrapWord: wrapWord,
bubbleSort: bubbleSort
};