From 8f52447f026c96d7f83964b52b9b792e76b2c485 Mon Sep 17 00:00:00 2001 From: khamal Date: Tue, 29 Aug 2023 00:15:55 -0500 Subject: [PATCH] completed underpants --- package.json | 2 +- underpants.js | 137 +++++++++++++++++++++++++++++++++++++++----------- 2 files changed, 108 insertions(+), 31 deletions(-) diff --git a/package.json b/package.json index 1b85307..ecd6a25 100644 --- a/package.json +++ b/package.json @@ -3,7 +3,7 @@ "version": "1.0.0", "private": false, "description": "Functional Functions for Fun", - "main": "data.js", + "main": "underpants.js", "directories": { "test": "test" }, diff --git a/underpants.js b/underpants.js index 49885fb..3e5bae7 100644 --- a/underpants.js +++ b/underpants.js @@ -371,8 +371,28 @@ _.partition = function (array, func) { * Examples: * _.map([1,2,3,4], function(e){return e * 2}) -> [2,4,6,8] */ -_.map = function (collection, placeholder) { - +_.map = function (collection, func) { + //a empty array to store the results + var resultArray = []; + //checks if the collection is an array + if (Array.isArray(collection)) { + //iterates through each element of the array + for (let i = 0; i < collection.length; i++) { + // this line calls the provided function with arguments element, i, and collection + var result = func(collection[i], i, collection); + // this line pushes the return value of the function call into the result array + resultArray.push(result); + } + } else if (typeof collection === "object") { + //this line iterates through each property in the object + for (var key in collection) { + if (collection.hasOwnProperty(key)) { + var result = func(collection[key], key, collection); + resultArray.push(result); + } + } + } + return resultArray; } @@ -390,15 +410,12 @@ _.map = function (collection, placeholder) { // _.pluck = function (arrayOfObjects, property) { // return _.map(arrayOfObjects, obj => obj[property]); // } -_.pluck = function (array, test) { - var Maparray = []; - - for (let i = 0; i < array.length; i++) { - var j = array[i]; - var result = test(j, i, array); - Maparray.push(result); - } - return Maparray; +_.pluck = function (array, property) { + //using _.map to iterate throuh the each obj in the array + var resultArray = array.map((obj) => { + return obj[property]; + }) + return resultArray; } /** _.every @@ -422,7 +439,7 @@ _.pluck = function (array, test) { * _.every([1,2,3], function(e){return e % 2 === 0}) -> false */ _.every = function (collection, func) { - //create a for loop + //create a for loop //create some varibles //use ternary operator to determine if element is true or false instead of if statements //create a if statement and return true if element is true or false if @@ -459,16 +476,36 @@ _.every = function (collection, func) { * _.some([1,3,5], function(e){return e % 2 === 0}) -> false * _.some([1,2,3], function(e){return e % 2 === 0}) -> true */ -_.some = function(collection, func){ - for (let i = 0; i < collection.length; i++) { - const element = collection[i]; - const result = func ? func(element, i, collection) : element; - - if (result) { - return true; +_.some = function (collection, func) { + + // checks if the function is not provided + if (!func) { + //this line iterates through each element in the collection + for (const item of collection) { + //this line checks if the element is true + if (item) { + return true; + } + } + return false; + } + // checks if the collection is an array + if (Array.isArray(collection)) { + //for loop + for (let i = 0; i < collection.length; i++) { + if (func(collection[i], i, collection)) { + return true; + } + } + } else if (typeof collection === "object") { + for (var key in collection) { + if (collection.hasOwnProperty(key)) { + if (func(collection[key], key, collection)) { + return true; + } + } } } - return false; } @@ -492,24 +529,24 @@ _.some = function(collection, func){ * Examples: * _.reduce([1,2,3], function(previousSum, currentValue, currentIndex){ return previousSum + currentValue }, 0) -> 6 */ -_.reduce = function(array, func, seed){ +_.reduce = function (array, func, seed) { var i = 0;// Initialize i for iterating through the collection var previousResult;// created a varible to hold the result of each iteration -// If no seed is provided,this line uses the first element as seed and starts iterating from the second element - if (seed === undefined){ + // If no seed is provided,this line uses the first element as seed and starts iterating from the second element + if (seed === undefined) { seed = array[0]; i = 1; } - previousResult = seed;// this line of code sets the initial previousResult to the seed value + previousResult = seed;// this line of code sets the initial previousResult to the seed value - // Iterate through the collection starting from the right index - for(; i < array.length; i++){ - var element = array[i]; // Gets the current element from the collection - previousResult = func(previousResult, element, i); // this line Applies the provided function to previousResult, current element, and index + // Iterate through the collection starting from the right index + for (; i < array.length; i++) { + var element = array[i]; // Gets the current element from the collection + previousResult = func(previousResult, element, i); // this line Applies the provided function to previousResult, current element, and index - } -return previousResult; // this line returns the final result after all iterations + } + return previousResult; // this line returns the final result after all iterations } @@ -529,6 +566,46 @@ return previousResult; // this line returns the final result after all iteration * _.extend(data, {a:"two"}); -> data now equals {a:"two"} */ +_.extend = function (collection, func) { + //this line of code checks if function is provided + if (!func) { + //this line of coded iterates through each element in the collection + for (var item of collection) { + //this line checks if element is false + if (item) { + //return false if at least one element is false + return false; + } + } + //returns true if all elements are true + return true; + } + //this line checks if colllection is an array + if (Array.isArray(collection)) { + //iterates through each element of the array + for (let i = 0; i < collection.length; i++) { + if (!func(collection[i], i, collection)) { + return false; + } + } + } else if (typeof collection === "object") { + //iterates through each property in the obj + for (var key in collection) { + //checks if property is directly on the obj + if (collection.hasOwnProperty(key)) { + //calling the function with the correct arguments + if (!func(collection[key], key, collection)) { + return false; + } + } + } + } + return true; + +} + + + ////////////////////////////////////////////////////////////////////// // DON'T REMOVE THIS CODE //////////////////////////////////////////// //////////////////////////////////////////////////////////////////////