diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..4818454
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 [Lealon Wolfe]
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
index 201f083..3eb3bf2 100644
--- a/README.md
+++ b/README.md
@@ -1,59 +1,47 @@
-# Underpants
-This activity is essentially a re-write of [underscore.js](http://underscorejs.org/).
-
-## Why?
-In the past exercises we've been writing a lot of loops over objects and arrays ourselves. Instead of doing that, we are going to write several fuctions to handle the looping for us. These functions are used every day by professional developers and we're well on our way to becoming professional developers!!
-
-This means that if we're confused about how a function should work, we can check the underscore.js documentation linked above for help.
-
-## Instructions
- - Open up index.html in a web browser.
- - Notice that all the tests are failing. :)
- - Open up underpants.js in a text editor and follow the instructions.
- - Make all the test pass!!
- - Open underpants.html in a text editor to view the code that runs the tests.
-
-## Links and Resources
-
-Some quick notes that may come in handy:
-
-- [underscore documentation](http://underscorejs.org/).
-- Many of the functions operate on "collections." They can take both arrays or
- objects as their arguments and you need to be able to handle both cases.
- - You can use `Array.isArray(obj)` to find out whether an object is an array.
- - You can use `obj.length` to test if something is either a string or an
- array.
-- Javascript has a built-in `Math` object that provides some very useful
- functions. [Math Documentation](https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Math).
-- Within a function, you can use the `arguments` variable to access all the
- parameters that were passed in even if they aren't named in the function
- definition. This is useful if you don't know how many arguments are going to
- be passed in in advance.
- - You can count the arguments by using `arguments.length` and access each
- argument using `arguments[i]`.
- - The `arguments` object is very similar to an array, but note that it does
- not support most array functions (such as `slice` or `push`). You can read
- more about this [here](http://www.sitepoint.com/arguments-a-javascript-oddity/).
-
-### Extra Credit:
-See Instructor for instructions.
-- defaults
-- *once*
-- memoize
-- delay
-- shuffle
-
-### Double Extra Credit:
-See Instructor for instructions.
-- once
-- invoke
-- sortBy
-- zip
-- flatten
-- intersection
-- difference
-- throttle
-
-**Note:** Some browsers provide built-in functions--including `forEach`, `map`,
-`reduce` and `filter`--that replicate the functionality of some of the functions
-you will implement. Don't use them to implement your functions.
+# @lealonwolfe/underpants
+
+A functional utility library implementing underscore.js-style functions. Created as part of a coding bootcamp exercise.
+
+## Installation
+
+```bash
+npm install @lealonwolfe/underpants
+Usage
+Node.js
+const _ = require('@lealonwolfe/underpants');
+
+console.log(_.identity(42)); // 42
+console.log(_.first([1, 2, 3], 2)); // [1, 2]
+console.log(_.map([1, 2, 3], x => x * 2)); // [2, 4, 6]
+Browser
+
+
+Available Functions
+_.identity(value) - Returns the value unchanged
+_.typeOf(value) - Returns the type of value as a string
+_.first(array, n) - Returns the first n elements of an array
+_.last(array, n) - Returns the last n elements of an array
+_.indexOf(array, value) - Returns the index of the first occurrence of value
+_.contains(array, value) - Returns true if array contains value
+_.each(collection, function) - Iterates over collection calling function for each element
+_.unique(array) - Returns array with duplicates removed
+_.filter(array, predicate) - Returns elements that pass the predicate test
+_.reject(array, predicate) - Returns elements that fail the predicate test
+_.partition(array, predicate) - Splits array into two arrays based on predicate
+_.map(collection, function) - Creates new array with results of calling function on each element
+_.pluck(array, property) - Extracts property values from array of objects
+_.every(collection, predicate) - Returns true if all elements pass predicate test
+_.some(collection, predicate) - Returns true if any element passes predicate test
+_.reduce(array, function, seed) - Reduces array to single value using function
+_.extend(object, ...sources) - Copies properties from sources to object
+Testing
+Run the test suite:
+
+npm test
+Open browser tests:
+
+npm run test:browser
+Development
+This library was created as part of a coding bootcamp exercise to understand functional programming concepts and utility libraries like underscore.js and lodash.
\ No newline at end of file
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new file mode 100644
index 0000000..c659699
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,920 @@
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+ "integrity": "sha512-CBdZ2oa/BHhS4xj5DlhjWNHcan57/5YuvfdLf17iVmIpd9KRm+DFLmC6nBNj+6Ua7Kt3TmOjDpQT1aTYOQtoUA==",
+ "dev": true,
+ "optional": true,
+ "dependencies": {
+ "amdefine": ">=0.0.4"
+ },
+ "engines": {
+ "node": ">=0.8.0"
+ }
+ },
+ "node_modules/sprintf-js": {
+ "version": "1.0.3",
+ "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
+ "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
+ "dev": true,
+ "license": "BSD-3-Clause"
+ },
+ "node_modules/supports-color": {
+ "version": "3.2.3",
+ "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.2.3.tgz",
+ "integrity": "sha512-Jds2VIYDrlp5ui7t8abHN2bjAu4LV/q4N2KivFPpGH0lrka0BMq/33AmECUXlKPcHigkNaqfXRENFju+rlcy+A==",
+ "dev": true,
+ "license": "MIT",
+ "dependencies": {
+ "has-flag": "^1.0.0"
+ },
+ "engines": {
+ "node": ">=0.8.0"
+ }
+ },
+ "node_modules/text-encoding": {
+ "version": "0.6.4",
+ "resolved": "https://registry.npmjs.org/text-encoding/-/text-encoding-0.6.4.tgz",
+ "integrity": "sha512-hJnc6Qg3dWoOMkqP53F0dzRIgtmsAge09kxUIqGrEUS4qr5rWLckGYaQAVr+opBrIMRErGgy6f5aPnyPpyGRfg==",
+ "deprecated": "no longer maintained",
+ "dev": true,
+ "license": "Unlicense"
+ },
+ "node_modules/type-check": {
+ "version": "0.3.2",
+ "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
+ "integrity": "sha512-ZCmOJdvOWDBYJlzAoFkC+Q0+bUyEOS1ltgp1MGU03fqHG+dbi9tBFU2Rd9QKiDZFAYrhPh2JUf7rZRIuHRKtOg==",
+ "dev": true,
+ "license": "MIT",
+ "dependencies": {
+ "prelude-ls": "~1.1.2"
+ },
+ "engines": {
+ "node": ">= 0.8.0"
+ }
+ },
+ "node_modules/type-detect": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-1.0.0.tgz",
+ "integrity": "sha512-f9Uv6ezcpvCQjJU0Zqbg+65qdcszv3qUQsZfjdRbWiZ7AMenrX1u0lNk9EoWWX6e1F+NULyg27mtdeZ5WhpljA==",
+ "dev": true,
+ "license": "MIT",
+ "engines": {
+ "node": "*"
+ }
+ },
+ "node_modules/uglify-js": {
+ "version": "3.19.3",
+ "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.19.3.tgz",
+ "integrity": "sha512-v3Xu+yuwBXisp6QYTcH4UbH+xYJXqnq2m/LtQVWKWzYc1iehYnLixoQDN9FH6/j9/oybfd6W9Ghwkl8+UMKTKQ==",
+ "dev": true,
+ "license": "BSD-2-Clause",
+ "optional": true,
+ "bin": {
+ "uglifyjs": "bin/uglifyjs"
+ },
+ "engines": {
+ "node": ">=0.8.0"
+ }
+ },
+ "node_modules/which": {
+ "version": "1.3.1",
+ "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+ "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+ "dev": true,
+ "license": "ISC",
+ "dependencies": {
+ "isexe": "^2.0.0"
+ },
+ "bin": {
+ "which": "bin/which"
+ }
+ },
+ "node_modules/word-wrap": {
+ "version": "1.2.5",
+ "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
+ "integrity": "sha512-BN22B5eaMMI9UMtjrGd5g5eCYPpCPDUy0FJXbYsaT5zYxjFOckS53SQDE3pWkVoWpHXVb3BrYcEN4Twa55B5cA==",
+ "dev": true,
+ "license": "MIT",
+ "engines": {
+ "node": ">=0.10.0"
+ }
+ },
+ "node_modules/wordwrap": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
+ "integrity": "sha512-gvVzJFlPycKc5dZN4yPkP8w7Dc37BtP1yczEneOb4uq34pXZcvrtRTmWV8W+Ume+XCxKgbjM+nevkyFPMybd4Q==",
+ "dev": true,
+ "license": "MIT"
+ },
+ "node_modules/wrappy": {
+ "version": "1.0.2",
+ "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+ "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+ "dev": true,
+ "license": "ISC"
+ }
+ }
+}
diff --git a/package.json b/package.json
index 721ceba..5c8f5e9 100644
--- a/package.json
+++ b/package.json
@@ -1,32 +1,33 @@
{
- "name": "underpants",
+ "name": "@lealonwolfe/underpants",
"version": "1.0.0",
- "private": true,
- "description": "Functional Functions for Fun",
- "main": "data.js",
- "directories": {
- "test": "test"
- },
- "scripts": {
- "pretest": "npm install",
- "test": "mocha ./test/underpants.spec.js || :",
- "posttest": "rm -rf ./test ./node_modules"
- },
+ "description": "Functional utility library - student implementation of underscore.js",
+ "main": "underpants.js",
+ "keywords": ["functional", "utilities", "underscore", "lodash", "functional-programming"],
+ "author": "Lealon Wolfe ",
+ "license": "MIT",
"repository": {
"type": "git",
- "url": "https://github.com/OperationSpark/underpants.git"
+ "url": "https://github.com/lealonwolfe/underpants.git"
},
- "author": "jfraboni",
- "license": "CC",
"bugs": {
- "url": "https://github.com/OperationSpark/underpants/issues"
+ "url": "https://github.com/lealonwolfe/underpants/issues"
+ },
+ "homepage": "https://github.com/lealonwolfe/underpants#readme",
+ "engines": {
+ "node": ">=12.0.0"
+ },
+ "scripts": {
+ "test": "mocha test/*.spec.js",
+ "test:browser": "open index.html"
},
- "homepage": "https://github.com/OperationSpark/underpants",
"devDependencies": {
- "chai": "^3.5.0",
- "istanbul": "^0.4.5",
- "lodash": "^4.17.4",
- "mocha": "^3.4.1",
- "sinon": "^2.2.0"
- }
-}
+ "chai": "^4.3.7",
+ "mocha": "^10.2.0"
+ },
+ "files": [
+ "underpants.js",
+ "README.md",
+ "LICENSE"
+ ]
+}
\ No newline at end of file
diff --git a/underpants.js b/underpants.js
index fc531b4..ed6856a 100644
--- a/underpants.js
+++ b/underpants.js
@@ -5,7 +5,7 @@
var _ = {};
-
+//this is a comment
/**
* START OF OUR LIBRARY!
* Implement each function below its instructions
@@ -20,7 +20,9 @@ var _ = {};
* _.identity(5) === 5
* _.identity({a: "b"}) === {a: "b"}
*/
-
+_.identity = function (val) {
+ return val;
+}
/** _.typeOf
* Arguments:
@@ -41,8 +43,15 @@ var _ = {};
* _.typeOf("javascript") -> "string"
* _.typeOf([1,2,3]) -> "array"
*/
-
-
+//_.typeOf = (val) => typeof(val);
+_.typeOf = (val) => {
+ return val === null ? "null" :
+ Array.isArray(val) ? "array" :
+ typeof val;
+}
+// console.log(_.typeOf(5));
+// console.log(_.typeOf("hello"));
+// console.log(_.typeOf([1,2,3]));
/** _.first
* Arguments:
* 1) An array
@@ -60,7 +69,15 @@ var _ = {};
* _.first(["a", "b", "c"], 1) -> "a"
* _.first(["a", "b", "c"], 2) -> ["a", "b"]
*/
-
+_.first = (arr, num) =>
+ !Array.isArray(arr) ? [] :
+ num === undefined || typeof num !== "number" ? arr[0] :
+ num < 0 ? [] :
+ arr.slice(0, num);
+// console.log( _.first("ponies", 1));
+// console.log(_.first(["a", "b", "c"], "ponies"))
+// console.log(_.first(["a", "b", "c"], 1))
+// console.log( _.first(["a", "b", "c"], 4))
/** _.last
* Arguments:
@@ -80,7 +97,17 @@ var _ = {};
* _.last(["a", "b", "c"], 2) -> ["b", "c"]
*/
-
+_.last = (arr, num) =>
+ !Array.isArray(arr) ? [] : //first check: if arr is an array
+ num === undefined || typeof num !== "number" ? arr[arr.length - 1] : //second check
+ num < 0 ? [] : //third check
+ num > arr.length ? arr :
+ arr.slice(num - 1, arr.length);
+
+// console.log(_.last("ponies", 1));
+// console.log(_.last(["a", "b", "c"], "ponies"))
+// console.log(_.last(["a", "b", "c"], 1))
+// console.log(_.last(["a", "b", "c"], 2))
/** _.indexOf
* Arguments:
* 1) An array
@@ -96,7 +123,23 @@ var _ = {};
* _.indexOf(["a","b","c"], "c") -> 2
* _.indexOf(["a","b","c"], "d") -> -1
*/
+_.indexOf = (arr, value) => {
+ var isFound = false;
+ var ind = [];
+ if (Array.isArray(arr)) {
+ for (var i = 0; i < arr.length; i++) {
+ if (arr[i] === value) {
+ ind.push(i);
+ isFound = true;
+ }
+ }
+
+ if (isFound) { return ind[0] } else { return -1 };
+
+ } else { return -1 };
+
+}
/** _.contains
* Arguments:
@@ -112,8 +155,28 @@ var _ = {};
* Examples:
* _.contains([1,"two", 3.14], "two") -> true
*/
+_.contains = (arr, val) => {
+ var isFound = false;
+ if (Array.isArray(arr)) {
+
+ for (var i = 0; i < arr.length; i++) {
+ if (arr[i] === val) {
+ isFound = true;
+ }
+ }
+
+ return isFound === true ? true :
+ false;
+
+ }
+
+
+
+
+}
+
/** _.each
* Arguments:
* 1) A collection
@@ -130,6 +193,27 @@ var _ = {};
* -> should log "a" "b" "c" to the console
*/
+_.each = (coll, func) => {
+
+ if (Array.isArray(coll)) {
+ for (var i = 0; i < coll.length; i++) {
+ func(coll[i], i, coll)
+ }
+ } else {
+ for (var element in coll) {
+ func(coll[element], element, coll);
+ }
+ }
+
+}
+
+
+//it runs the function you give it while passing the element, index/elemment, and collection
+//no inherent returns
+// _.each(Any array, a function with possible parameters( the element, index/elemment, and collection) )
+
+
+
/** _.unique
* Arguments:
@@ -140,6 +224,16 @@ var _ = {};
* Examples:
* _.unique([1,2,2,4,5,6,5,2]) -> [1,2,4,5,6]
*/
+_.unique = (arr) => {
+ var holder = [];
+
+
+
+ for (var i = 0; i < arr.length; i++) {
+ if (!_.contains(holder, arr[i])) { holder.push(arr[i]) }
+ }
+ return holder;
+}
/** _.filter
@@ -159,6 +253,24 @@ var _ = {};
*/
+
+
+_.filter = (arr, func) => {
+ // holds variable to return
+ var truths = [];
+ var holders = [];
+ //go through each element
+ _.each(arr, (...a) => {
+ truths.push(func(...a))
+ })
+ for (var i = 0; i < arr.length; i++) {
+ if (truths[i]) { holders.push(arr[i]) }
+ }
+ return holders;
+}
+
+//console.log(_.filter([1, 2, 3, 4, 5], (x) => { return x > 2 }))
+
/** _.reject
* Arguments:
* 1) An array
@@ -172,6 +284,21 @@ var _ = {};
* _.reject([1,2,3,4,5], function(e){return e%2 === 0}) -> [1,3,5]
*/
+_.reject = (arr, func) => {
+ // holds variable to return
+ var truths = [];
+ var holders = [];
+ //go through each element
+ _.each(arr, (...a) => {
+ truths.push(func(...a))
+ })
+ for (var i = 0; i < arr.length; i++) {
+ if (!truths[i]) { holders.push(arr[i]) }
+ }
+ return holders;
+}
+
+
/** _.partition
* Arguments:
@@ -192,6 +319,27 @@ var _ = {};
}
*/
+_.partition = (arr, func) => {
+ // holds variable to return
+ var truths = [];
+ var tHolders = [];
+ var fHolders = [];
+ //go through each element
+ _.each(arr, (...a) => {
+ truths.push(func(...a))
+ })
+ for (var i = 0; i < arr.length; i++) {
+ if (!truths[i]) { fHolders.push(arr[i]) }
+ }
+
+ for (var i = 0; i < arr.length; i++) {
+ if (truths[i]) { tHolders.push(arr[i]) }
+ }
+
+ return [tHolders, fHolders];
+}
+
+
/** _.map
* Arguments:
@@ -208,7 +356,19 @@ var _ = {};
* Examples:
* _.map([1,2,3,4], function(e){return e * 2}) -> [2,4,6,8]
*/
+_.map = (coll, func) => {
+ var result = [];
+ _.each(coll, (...a) => {
+ result.push(func(...a))
+ })
+ return result;
+ // var result = [];
+ // _.each(coll, (coll[i], i, coll) => {
+ // result.push(func(coll[i], i, coll))
+ // })
+ // return result;
+}
/** _.pluck
* Arguments:
@@ -221,6 +381,20 @@ var _ = {};
* _.pluck([{a: "one"}, {a: "two"}], "a") -> ["one", "two"]
*/
+_.pluck = (ao, prop) => {
+ //console.log({ ao, prop })
+ let holder = _.map(ao, (o) => {
+ // console.log([e])
+ return (o[prop]) // gives us access to the the objects
+ })
+
+ // for(let i= 0; i < prop.length; i++){
+ // return prop[i]
+ // }
+ //console.log(holder)
+ return holder // returns the array stored in .map
+
+}
/** _.every
* Arguments:
@@ -242,8 +416,26 @@ var _ = {};
* _.every([2,4,6], function(e){return e % 2 === 0}) -> true
* _.every([1,2,3], function(e){return e % 2 === 0}) -> false
*/
+_.every = (coll, func) => {
+ // default function: identity (checks truthiness of elements)
+ func = (typeof func === "function") ? func : (val => val);
+
+ // map results of func across coll
+ const results = _.map(coll, (...a) => func(...a));
+
+ // check if all results are truthy
+ for (let i = 0; i < results.length; i++) {
+ if (!results[i]) {
+ return false;
+ }
+ }
+ return true;
+}
+
+
+//console.log(_.every([1, 2, 3], function (e) { return e % 2 === 0 }))
/** _.some
* Arguments:
* 1) A collection
@@ -265,7 +457,18 @@ var _ = {};
* _.some([1,2,3], function(e){return e % 2 === 0}) -> true
*/
-
+_.some = (coll, func) => {
+func = (typeof func === "function") ? func : (val => val);
+const results = _.map(coll, (...a) => func(...a));
+
+ // check if all results are truthy
+ for (let i = 0; i < results.length; i++) {
+ if (results[i]) {
+ return true;
+ }
+ }
+ return false;
+}
/** _.reduce
* Arguments:
* 1) An array
@@ -285,7 +488,23 @@ var _ = {};
* _.reduce([1,2,3], function(previousSum, currentValue, currentIndex){ return previousSum + currentValue }, 0) -> 6
*/
-
+_.reduce = (arr ,func, seed) =>{
+ var result;
+ var startIndex;
+ if(seed !== undefined){
+ result = seed;
+ startIndex = 0
+ }
+ else{
+result = arr[0];
+startIndex = 1
+ }
+
+for(let i = startIndex; i < arr.length; i++){
+ result = func(result, arr[i], i)
+}
+return result
+}
/** _.extend
* Arguments:
* 1) An Object
@@ -300,13 +519,20 @@ var _ = {};
* _.extend(data, {b:"two"}); -> data now equals {a:"one",b:"two"}
* _.extend(data, {a:"two"}); -> data now equals {a:"two"}
*/
+_.extend = (obj1,...objs) => {
+_.each(objs, o =>{
+for(let key in o){
+ obj1[key] = o[key]
+}
+})
+return obj1
+}
//////////////////////////////////////////////////////////////////////
// DON'T REMOVE THIS CODE ////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
-
-if((typeof process !== 'undefined') &&
- (typeof process.versions.node !== 'undefined')) {
+if ((typeof process !== 'undefined') &&
+ (typeof process.versions.node !== 'undefined')) {
// here, export any references you need for tests //
module.exports = _;
}