classExercises

Exercises

'use strict'

// / Write a function capitalize that takes a string and uses .map to return the same string in all caps. // // ex. capitalize('whoop') // => 'WHOOP' // // ex. capitalize('oh hey gurl') // => "OH HEY GURL" // // use .split // // use .join // var capitalize = function(string) { // // your code here // }; // capitalize("hello There"); // ​ // // Now write a new function called swapCase that takes a string of words and uses .map and your newly written capitalize() // // function to return a string where every other word is in all caps. // // Hint: look up Array.prototype.map on MDN and see what arguments the .map callback can take. // // ex: swapCase('hey gurl, lets javascript together sometime') // => "HEY gurl, LETS javascript TOGETHER sometime" // ​ // var swapCase = function(string){ // // your code here // } // swapCase("hey gurl, lets javascript together sometime")

function stepbystep_capitalize(inputStr) {

// this step does:
//      split the inputStr cast as a String
//      into a new array of single characters
//
//      here the resulting lowerCaseArray consists of X elements
//      where X = inputStr.length
//      and each element has a single character
//

let lowerCaseArray = String(inputStr).split("");

// this step does:
//      converts every character of the lowercase array
//      into an uppercase character
//      by utilizing the callbaclk function callbackConvertToUppercase
//      that is passed as an argument to .map
//
//      the resulting array upperCaseArray consists of X elements
//      where X is same as step 1
//      and each element has a single uppercased string character
//

let upperCaseArray = lowerCaseArray.map(callbackConvertToUppercase);

// this step does:
//      join all the elements of upperCaseArray into a single string
//      without any seperators and we return that string
//
return upperCaseArray.join('');

};

function also_capitalize(inputStr) { return String(inputStr).split("").map(callbackConvertToUppercase).join(''); };

function callbackConvertToUppercase (currentElementValue) { return String(currentElementValue).toUpperCase(); };

console.log(stepbystep_capitalize('oh hey gurl')); // => "OH HEY GURL" console.log(also_capitalize('oh hey gurl')); // => "OH HEY GURL" ; //exercises function swapCase (inputStr) { let lowerCaseArray = String(inputStr).split(" "); let mixCaseArray = lowerCaseArray.map(callbackConvertEveryOther) return mixCaseArray.join(' ');
}

function callbackConvertEveryOther (currentElementValue, currentElementIndex) { //how where do we get the currentElementValue, currentElementIndex etc, if we don't use it dose the code work if (currentElementIndex % 2 == 0) { return stepbystep_capitalize(currentElementValue) //i though here we should use swapCase instead of stepbystep_capitalize } else { return currentElementValue } };

// => "HEY gurl, LETS javascript TOGETHER sometime" console.log(swapCase('hey gurl, lets javascript together sometime'));

;

//exercises 1 function capital(stringStr) { let lowercase = String(stringStr).split(''); let uppercase = lowercase.map(callingBackAgain) return uppercase.join(''); };

function callingBackAgain(currentElementValue) { return String(currentElementValue).toUpperCase() }; console.log(capital('how did i do it again'));

//exercises 1 / short format function alsoCapital(stringStr) { return String(stringStr).split('').map(callingBackAgain).join(''); }; function callingBackAgain(currentElementValue) { return String(currentElementValue).toUpperCase(); };

console.log(alsoCapital('again and again and again...'));

//exercises function showCase(myStr) { let lessCase = String(myStr).split(''); let topCase = lessCase.map(callMeBack); return topCase.join(''); };

function callMeBack(currentElementValue, currentElementIndex) { if (currentElementIndex % 2 == 0) { return capital(currentElementValue) } else { return currentElementValue }; };

console.log(showCase('i have got to do this again'));

//exercise function showCase(myStr) { return String(myStr).split('').map(callMeBack).join('') }

function callMeBack(currentElementValue, currentElementIndex) { if (currentElementIndex % 2 == 0) { return capital(currentElementValue) } else { return currentElementValue }; }; console.log(swapCase('hey gurl, lets javascript together sometime')) // => "HEY gurl, LETS javascript TOGETHER sometime"

// function showEvenOrOdd(aNumber) { // if (aNumber % 2 == 0) { // console.log(even) // } else { // console.log(odd) // } // }