mirror of
https://github.com/10h30/odin-javascript-exercises.git
synced 2026-06-05 15:09:09 +09:00
Completed 1-4
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@@ -1,5 +1,5 @@
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const helloWorld = function() {
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const helloWorld = function() {
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return ''
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return 'Hello, World!'
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};
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};
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module.exports = helloWorld;
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module.exports = helloWorld;
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@@ -1,5 +1,12 @@
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const repeatString = function() {
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const repeatString = function(string,number) {
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let fullString = "";
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if (number < 0) {
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return "ERROR";
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}
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for (i = 0; i < number; i++) {
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fullString += string;
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}
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return fullString;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@@ -4,26 +4,26 @@ describe('repeatString', () => {
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test('repeats the string', () => {
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test('repeats the string', () => {
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expect(repeatString('hey', 3)).toEqual('heyheyhey');
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expect(repeatString('hey', 3)).toEqual('heyheyhey');
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});
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});
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test.skip('repeats the string many times', () => {
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test('repeats the string many times', () => {
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expect(repeatString('hello', 10)).toEqual('hellohellohellohellohellohellohellohellohellohello');
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expect(repeatString('hello', 10)).toEqual('hellohellohellohellohellohellohellohellohellohello');
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});
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});
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test.skip('repeats the string 1 times', () => {
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test('repeats the string 1 times', () => {
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expect(repeatString('hi', 1)).toEqual('hi');
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expect(repeatString('hi', 1)).toEqual('hi');
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});
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});
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test.skip('repeats the string 0 times', () => {
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test('repeats the string 0 times', () => {
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expect(repeatString('bye', 0)).toEqual('');
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expect(repeatString('bye', 0)).toEqual('');
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});
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});
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test.skip('does not use the built-in String repeat method', () => {
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test('does not use the built-in String repeat method', () => {
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/* Even though there is a built-in String repeat method,
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/* Even though there is a built-in String repeat method,
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in this exercise specifically, we want you to practise using loops */
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in this exercise specifically, we want you to practise using loops */
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jest.spyOn(String.prototype, 'repeat').mockName('Built-in String repeat method');
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jest.spyOn(String.prototype, 'repeat').mockName('Built-in String repeat method');
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repeatString("don't use the built-in repeat method!", 1);
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repeatString("don't use the built-in repeat method!", 1);
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expect(String.prototype.repeat).not.toHaveBeenCalled();
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expect(String.prototype.repeat).not.toHaveBeenCalled();
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});
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});
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test.skip('returns ERROR with negative numbers', () => {
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test('returns ERROR with negative numbers', () => {
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expect(repeatString('goodbye', -1)).toEqual('ERROR');
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expect(repeatString('goodbye', -1)).toEqual('ERROR');
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});
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});
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test.skip('repeats the string a random amount of times', function () {
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test('repeats the string a random amount of times', function () {
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/* The number is generated by using Math.random to get a value from between
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/* The number is generated by using Math.random to get a value from between
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0 to 1, when this is multiplied by 1000 and rounded down with Math.floor it
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0 to 1, when this is multiplied by 1000 and rounded down with Math.floor it
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equals a number between 0 to 999 (this number will change everytime you run
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equals a number between 0 to 999 (this number will change everytime you run
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@@ -36,7 +36,7 @@ describe('repeatString', () => {
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const number = Math.floor(Math.random() * 1000);
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const number = Math.floor(Math.random() * 1000);
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expect(repeatString('hey', number)).toBe('hey'.repeat(number));
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expect(repeatString('hey', number)).toBe('hey'.repeat(number));
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});
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});
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test.skip('works with blank strings', () => {
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test('works with blank strings', () => {
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expect(repeatString('', 10)).toEqual('');
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expect(repeatString('', 10)).toEqual('');
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});
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});
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});
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});
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@@ -1,5 +1,9 @@
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const reverseString = function() {
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const reverseString = function(string) {
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let newString =""
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for (i = string.length; i >=0 ; i--) {
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newString += string.charAt(i);
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}
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return newString;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@@ -5,16 +5,16 @@ describe('reverseString', () => {
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expect(reverseString('hello')).toEqual('olleh');
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expect(reverseString('hello')).toEqual('olleh');
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});
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});
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test.skip('reverses multiple words', () => {
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test('reverses multiple words', () => {
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expect(reverseString('hello there')).toEqual('ereht olleh');
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expect(reverseString('hello there')).toEqual('ereht olleh');
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});
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});
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test.skip('works with numbers and punctuation', () => {
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test('works with numbers and punctuation', () => {
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expect(reverseString('123! abc! Hello, Odinite.')).toEqual(
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expect(reverseString('123! abc! Hello, Odinite.')).toEqual(
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'.etinidO ,olleH !cba !321'
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'.etinidO ,olleH !cba !321'
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);
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);
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});
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});
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test.skip('works with blank strings', () => {
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test('works with blank strings', () => {
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expect(reverseString('')).toEqual('');
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expect(reverseString('')).toEqual('');
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});
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});
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});
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});
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@@ -1,4 +1,38 @@
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const removeFromArray = function() {
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const removeFromArray = function(originalArray,...theArgs) {
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let newArray = [];
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console.log("Original Array: " + originalArray)
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console.log("Argument Length: " + theArgs.length)
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/*for (const number of originalArray) {
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console.log("Current number: " + number)
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for (let i=0; i < arguments.length; i++) {
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console.log("Current argument value: " + theArgs[i]);
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if (number === theArgs[i]) {
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const index = originalArray.indexOf(number);
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if (index > -1) { // only splice array when item is found
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originalArray.splice(index, 1); // 2nd parameter means remove one item only
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}
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console.log(newArray)
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}
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}
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}*/
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for (let i=0; i < theArgs.length; i++) {
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for (z=0; z < originalArray.length; z++ ) {
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//for (const number of originalArray) {
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number = originalArray[z];
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console.log("Current number: " + number);
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if (number === theArgs[i]) {
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const index = originalArray.indexOf(number);
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if (index > -1) { // only splice array when item is found
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originalArray.splice(index, 1); // 2nd parameter means remove one item only
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z--;
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}
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}
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console.log(originalArray)
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}
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}
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return originalArray;
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};
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};
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// Do not edit below this line
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// Do not edit below this line
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@@ -4,25 +4,25 @@ describe('removeFromArray', () => {
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test('removes a single value', () => {
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test('removes a single value', () => {
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expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
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expect(removeFromArray([1, 2, 3, 4], 3)).toEqual([1, 2, 4]);
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});
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});
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test.skip('removes multiple values', () => {
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test('removes multiple values', () => {
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expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
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expect(removeFromArray([1, 2, 3, 4], 3, 2)).toEqual([1, 4]);
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});
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});
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test.skip('removes multiple of the same value', () => {
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test('removes multiple of the same value', () => {
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expect(removeFromArray([1, 2, 2, 3], 2)).toEqual([1, 3]);
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expect(removeFromArray([1, 2, 2, 3], 2)).toEqual([1, 3]);
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});
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});
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test.skip('ignores non present values', () => {
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test('ignores non present values', () => {
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expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
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expect(removeFromArray([1, 2, 3, 4], 7, "tacos")).toEqual([1, 2, 3, 4]);
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});
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});
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test.skip('ignores non present values, but still works', () => {
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test('ignores non present values, but still works', () => {
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expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
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expect(removeFromArray([1, 2, 3, 4], 7, 2)).toEqual([1, 3, 4]);
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});
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});
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test.skip('can remove all values', () => {
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test('can remove all values', () => {
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expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
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expect(removeFromArray([1, 2, 3, 4], 1, 2, 3, 4)).toEqual([]);
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});
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});
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test.skip('works with strings', () => {
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test('works with strings', () => {
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expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
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expect(removeFromArray(["hey", 2, 3, "ho"], "hey", 3)).toEqual([2, "ho"]);
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});
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});
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test.skip('only removes same type', () => {
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test('only removes same type', () => {
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expect(removeFromArray([1, 2, 3], "1", 3)).toEqual([1, 2]);
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expect(removeFromArray([1, 2, 3], "1", 3)).toEqual([1, 2]);
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});
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});
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});
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});
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