lodown-trishalianza/.c9/metadata/workspace/index.js

An npm functional programming library project

{"changed":true,"filter":false,"title":"index.js","tooltip":"/index.js","value":"// This makes the arguments variable behave the way we want it to and a few\n// other things. For more info:\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode\n'use strict';\n\nvar _ = {};\n\n\n/**\n* START OF OUR LIBRARY!\n* Implement each function below it's instructions\n*/\n\n/** _.typeOf\n* Arguments:\n*   1) Any value\n* Objectives:\n*   1) Return the type of <value> as a string\n*       Types are one of:\n*          - \"string\"\n*          - \"array\"\n*          - \"object\"\n*          - \"undefined\"\n*          - \"number\"\n*          - \"boolean\"\n*          - \"null\"\n*          - \"function\"\n* Examples:\n* _.typeOf(134) -> \"number\"\n* _.typeOf(\"javascript\") -> \"string\"\n* _.typeOf([1,2,3]) -> \"array\"\n*/\n_.typeOf = function(value) {\n  \n    if(Array.isArray(value)) {\n        return 'array';\n    }else if(value === null) {\n        return 'null';\n    }else{\n        return typeof value;\n    }\n};\n\n/** _.first\n* Arguments:\n*   1) An array\n*   2) A number\n* Objectives:\n*   1) If <array> is not an array, return []\n*   2) If <number> is not given or not a number, return just the first element in <array>.\n*   3) Otherwise, return the first <number> items of <array>\n* Edge Cases:\n*   1) What if <number> is negative?\n*   2) What if <number> is greater than <array>.length?\n* Examples:\n*   _.first(\"ponies\", 1) -> []\n*   _.first([\"a\", \"b\", \"c\"], \"ponies\") -> \"a\"\n*   _.first([\"a\", \"b\", \"c\"], 1) -> \"a\"\n*   _.first([\"a\", \"b\", \"c\"], 2) -> [\"a\", \"b\"]\n*/\n_.first = function(array, number) {\n    var arr = [];\n    if(number > array.length) {\n        number = array.length;\n    }\n    \n    if(_.typeOf(number) === 'number') {\n        if(Array.isArray(array)) {\n            for(var i = 0; i <= number -1; i++){\n                arr.push(array[i]);\n     \n            }\n        } else { arr = array[0];\n    } \n    return arr;\n}\n\n};\n\n/** _.last\n* Arguments:\n*   1) An array\n*   2) A number\n* Objectives:\n*   1) If <array> is not an array, return []\n*   2) If <number> is not given or not a number, return just the last element in <array>.\n*   3) Otherwise, return the last <number> items of <array>\n* Edge Cases:\n*   1) What if <number> is negative?\n*   2) What if <number> is greater than <array>.length?\n* Examples:\n*   _.last(\"ponies\", 2) -> []\n*   _.last([\"a\", \"b\", \"c\"], \"ponies\") -> \"c\"\n*   _.last([\"a\", \"b\", \"c\"], 1) -> \"c\"\n*   _.last([\"a\", \"b\", \"c\"], 2) -> [\"b\", \"c\"]\n*/\n_.last = function(array, number) {\n    var arr = [];\n    if(number > array.length) {\n        number = array.length;\n    }\n    if (Array.isArray(array) === true) {\n        if (_.typeOf(number) === 'number') {\n            for(var i = array.length - number; i < array.length; i++){\n                arr.push(array[i]);\n                }\n            }else{\n                return array[array.length -1];\n            }\n        }else{\n            return [];\n        }\n        return arr;\n    };\n\n\n/** _.indexOf\n* Arguments:\n*   1) An array\n*   2) A value\n* Objectives:\n*   1) Return the index of <array> that is the first occurrance of <value>\n*   2) Return -1 if <value> is not in <array>\n*   3) Do not use [].indexOf()!\n* Edge Cases:\n*   1) What if <array> has multiple occurances of val?\n*   2) What if <val> isn't in <array>?\n* Examples:\n*   _.indexOf([\"a\",\"b\",\"c\"], \"c\") -> 2\n*   _.indexOf([\"a\",\"b\",\"c\"], \"d\") -> -1\n*/\n_.indexOf = function(array, value) {\n    for(var i = 0; i < array.length; i++){\n        if(array[i] === value) {\n            return i;\n        }\n    }\n    \n    return -1;\n};\n\n/** _.contains\n* Arguments:\n*   1) An array\n*   2) A value\n* Objectives:\n*   1) Return true if <array> contains <value>\n*   2) Return false otherwise\n*   3) You must use the ternary operator in your implementation.\n* Edge Cases:\n*   1) did you use === ?\n*   2) what if no <value> is given?\n* Examples:\n*   _.contains([1,\"two\", 3.14], \"two\") -> true\n*/\n_.contains = function(array, value) {\n        for(var i = 0; i < array.length; i++) {\n            if(value === array[i]) {\n                return true;\n            }\n        }\n    return false;\n};\n\n/** _.each\n* Arguments:\n*   1) A collection\n*   2) A function\n* Objectives:\n*   1) if <collection> is an array, call <function> once for each element\n*      with the arguments:\n*         the element, it's index, <collection>\n*   2) if <collection> is an object, call <function> once for each property\n*      with the arguments:\n*         the property's value, it's key, <collection>\n* Examples:\n*   _.each([\"a\",\"b\",\"c\"], function(e,i,a){ console.log(e)});\n*      -> should log \"a\" \"b\" \"c\" to the console\n*/\n_.each = function(collection, funct) {\n    if(typeof collection === 'object') {\n        for (var entry in collection) {\n            funct(collection[entry], entry, collection);\n        }\n    }\nreturn collection;\n};\n\n\n/** _.filter\n* Arguments:\n*   1) An array\n*   2) A function\n* Objectives:\n*   1) call <function> for each element in <array> passing the arguments:\n*      the element, it's index, <array>\n*   2) return a new array of elements for which calling <function> returned true\n* Edge Cases:\n*   1) What if <function> returns something other than true or false?\n* Examples:\n*   _.filter([1,2,3,4,5], function(x){return x%2 === 0}) -> [2,4]\n* Extra Credit:\n*   use _.each in your implementation\n*/\n_.filter = function(array, funct) {\n    var arr = [];\n    for(var i = 0; i < array.length; i++) {\n        if(funct(array[i], i, array)) {\n            arr.push(array[i]);\n        }\n    }\n};\n    \n\n/** _.map\n* Arguments:\n*   1) A collection\n*   2) a function\n* Objectives:\n*   1) call <function> for each element in <collection> passing the arguments:\n*        if <collection> is an array:\n*            the element, it's index, <collection>\n*        if <collection> is an object:\n*            the value, it's key, <collection>\n*   2) save the return value of each <function> call in a new array\n*   3) return the new array\n* Examples:\n*   _.map([1,2,3,4], function(e){return e * 2}) -> [2,4,6,8]\n*/\n_.map = function(collection, funct) {\n    var array = [];\n    if(Array.isArray(collection)){\n        for(var i = 0; i < collection.length; i++) {\n            array.push(funct(collection[i], i, collection));\n        }\n    } else if(_.typeOf(collection) === 'object'){ \n        for(var key in collection) {\n            array.push(funct(collection[key], key, collection));\n        }\n    }\n    \n    return array;\n};\n\n\n/** _.reject\n* Arguments:\n*   1) An array\n*   2) A function\n* Objectives:\n*   1) call <function> for each element in <array> passing the arguments:\n*      the element, it's index, <array>\n*   2) return a new array of elements for which calling <function> returned false\n*   3) This is the logical inverse if _.filter(), you must use _.filter() in your implementation\n* Examples:\n*   _.reject([1,2,3,4,5], function(e){return e%2 === 0}) -> [1,3,5]\n*/\n\n_.reject = function(array, funct) {\n    var newArray= [];\n    var arr = _.filter(array, funct);\n        for(var i = 0; i < array.length; i++) {\n            if(arr.includes(array[i]) === false) {\n                newArray.push(array[i]);\n            }\n        }\n        \n        return newArray;\n};\n\n\n/** _.partition\n* Arguments:\n*   1) An array\n*   2) A function\n* Objectives:\n*   1) Call <function> for each element in <array> passing it the arguments:\n*       element, key, <array>\n*   2) Return an array that is made up of 2 sub arrays:\n*       0) An array that contains all the values for which <function> returned something truthy\n*       1) An array that contains all the values for which <function> returned something falsy\n* Edge Cases:\n*   1) This is going to return an array of arrays.\n* Examples:\n*   _.partition([1,2,3,4,5], function(element,index,arr){\n*     return element % 2 === 0;\n*   }); -> [[2,4],[1,3,5]]\n}\n*/\n\n_.partition = function(array, funct) {\n    return[_.filter(array, funct), _.reject(array, funct)];\n};\n\n\n/** _.every\n* Arguments:\n*   1) A collection\n*   2) A function\n* Objectives:\n*   1) Call <function> for every element of <collection> with the paramaters:\n*      if <collection> is an array:\n*          current element, it's index, <collection>\n*      if <collection> is an object:\n*          current value, current key, <collection>\n*   2) If the return value of calling <function> for every element is true, return true\n*   3) If even one of them returns false, return false\n*   4) If <function> is not provided, return true if every element is truthy, otherwise return false\n* Edge Cases:\n*   1) what if <function> doesn't return a boolean\n*   2) What if <function> is not given?\n* Examples:\n*   _.every([2,4,6], function(e){return e % 2 === 0}) -> true\n*   _.every([1,2,3], function(e){return e % 2 === 0}) -> false\n*/\n_.every = function (collection, funct) {\n        if (funct === undefined) {\n            funct = function (value, entry, collection) {\n                return value;\n            };\n        } \n        let res = true;\n        let gather = function (value, entry, collection) {\n            if(funct(value, entry, collection) === false) {\n                res = false;\n            }\n        };\n        \n        _.each(collection, gather);\n        return res;\n};\n\n/** _.some\n* Arguments:\n*   1) A collection\n*   2) A function\n* Objectives:\n*   1) Call <function> for every element of <collection> with the paramaters:\n*       if <collection> is an array:\n*        current element, it's index, <collection>\n*       if <collection> is an object:\n*        current value, current key, <collection>\n*   2) If the return value of calling <function> is true for at least one element, return true\n*   3) If it is false for all elements, return false\n*   4) If <function> is not provided return true if at least one element is truthy, otherwise return false\n* Edge Cases:\n*   1) what if <function> doesn't return a boolean\n*   2) What if <function> is not given?\n* Examples:\n*   _.some([1,3,5], function(e){return e % 2 === 0}) -> false\n*   _.some([1,2,3], function(e){return e % 2 === 0}) -> true\n*/\n\n_.some = function(collection, funct) {\n    if(funct === undefined) {\n        funct = function(value, entry, collection) {\n            return value;\n        };\n    }\n    \n    let res = false;\n    let gather = function(value, entry, collection) {\n        if(funct(value, entry, collection)) {\n            \n            res = true;\n        }\n    };\n    \n    _.each(collection, gather);\n};\n\n\n/** _.pluck\n* Arguments:\n*   1) An array of objects\n*   2) A property\n* Objectives:\n*   1) Return an array containing the value of <property> for every element in <array>\n*   2) You must use _.map() in your implementation.\n* Examples:\n*   _.pluck([{a: \"one\"}, {a: \"two\"}], \"a\") -> [\"one\", \"two\"]\n*/\n_.pluck = function(array, property) {\n    var arr =  [];\n    arr = _.map(array, check);\n    \n    function check(value, i) {\n        return array[i][property];\n    }\nreturn arr;\n};\n\n//////////////////////////////////////////////////////////////////////\n// DON'T REMOVE THIS CODE ////////////////////////////////////////////\n//////////////////////////////////////////////////////////////////////\n\nif((typeof process !== 'undefined') &&\n   (typeof process.versions.node !== 'undefined')) {\n    // here, export any references you need for tests //\n    module.exports = _;\n    module.exports.identity = _.identity;\nmodule.exports.typeOf = _.typeOf;\nmodule.exports.first = _.first;\nmodule.exports.last = _.last;\nmodule.exports.indexOf = _.indexOf;\nmodule.exports.contains = _.contains;\nmodule.exports.each = _.each;\nmodule.exports.unique = _.unique;\nmodule.exports.filter = _.filter;\nmodule.exports.reject = _.reject;\nmodule.exports.partition = _.partition;\nmodule.exports.map = _.map;\nmodule.exports.pluck = _.pluck;\nmodule.exports.every = _.every;\nmodule.exports.some = _.some;\nmodule.exports.reduce = _.reduce;\nmodule.exports.extend = _.extend;\n}\n","undoManager":{"mark":-2,"position":3,"stack":[[{"start":{"row":23,"column":27},"end":{"row":24,"column":0},"action":"insert","lines":["",""],"id":3},{"start":{"row":24,"column":0},"end":{"row":25,"column":0},"action":"insert","lines":["",""]}],[{"start":{"row":0,"column":0},"end":{"row":26,"column":0},"action":"remove","lines":["'use strict';","","// YOU KNOW WHAT TO DO //","","/**"," * each: Designed to loop over a collection, Array or Object, and applies the "," * action Function to each value in the collection."," * "," * @param {Array or Object} collection: The collection over which to iterate."," * @param {Function} action: The Function to be applied to each value in the "," * collection"," */","function each(collection, action) {","    if(Array.isArray(collection)) {","        for(var i = 0; i < collection.length; i++) {","            action(collection[i], i, collection);","        }","    } else {","        for (var key in collection) {","            action(collection[key], key, collection);","        }","    }","}","module.exports.each = each;","","",""],"id":5},{"start":{"row":0,"column":0},"end":{"row":401,"column":0},"action":"insert","lines":["// This makes the arguments variable behave the way we want it to and a few","// other things. For more info:","// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Strict_mode","'use strict';","","var _ = {};","","","/**","* START OF OUR LIBRARY!","* Implement each function below it's instructions","*/","","/** _.typeOf","* Arguments:","*   1) Any value","* Objectives:","*   1) Return the type of <value> as a string","*       Types are one of:","*          - \"string\"","*          - \"array\"","*          - \"object\"","*          - \"undefined\"","*          - \"number\"","*          - \"boolean\"","*          - \"null\"","*          - \"function\"","* Examples:","* _.typeOf(134) -> \"number\"","* _.typeOf(\"javascript\") -> \"string\"","* _.typeOf([1,2,3]) -> \"array\"","*/","_.typeOf = function(value) {","  ","    if(Array.isArray(value)) {","        return 'array';","    }else if(value === null) {","        return 'null';","    }else{","        return typeof value;","    }","};","","/** _.first","* Arguments:","*   1) An array","*   2) A number","* Objectives:","*   1) If <array> is not an array, return []","*   2) If <number> is not given or not a number, return just the first element in <array>.","*   3) Otherwise, return the first <number> items of <array>","* Edge Cases:","*   1) What if <number> is negative?","*   2) What if <number> is greater than <array>.length?","* Examples:","*   _.first(\"ponies\", 1) -> []","*   _.first([\"a\", \"b\", \"c\"], \"ponies\") -> \"a\"","*   _.first([\"a\", \"b\", \"c\"], 1) -> \"a\"","*   _.first([\"a\", \"b\", \"c\"], 2) -> [\"a\", \"b\"]","*/","_.first = function(array, number) {","    var arr = [];","    if(number > array.length) {","        number = array.length;","    }","    ","    if(_.typeOf(number) === 'number') {","        if(Array.isArray(array)) {","            for(var i = 0; i <= number -1; i++){","                arr.push(array[i]);","     ","            }","        } else { arr = array[0];","    } ","    return arr;","}","","};","","/** _.last","* Arguments:","*   1) An array","*   2) A number","* Objectives:","*   1) If <array> is not an array, return []","*   2) If <number> is not given or not a number, return just the last element in <array>.","*   3) Otherwise, return the last <number> items of <array>","* Edge Cases:","*   1) What if <number> is negative?","*   2) What if <number> is greater than <array>.length?","* Examples:","*   _.last(\"ponies\", 2) -> []","*   _.last([\"a\", \"b\", \"c\"], \"ponies\") -> \"c\"","*   _.last([\"a\", \"b\", \"c\"], 1) -> \"c\"","*   _.last([\"a\", \"b\", \"c\"], 2) -> [\"b\", \"c\"]","*/","_.last = function(array, number) {","    var arr = [];","    if(number > array.length) {","        number = array.length;","    }","    if (Array.isArray(array) === true) {","        if (_.typeOf(number) === 'number') {","            for(var i = array.length - number; i < array.length; i++){","                arr.push(array[i]);","                }","            }else{","                return array[array.length -1];","            }","        }else{","            return [];","        }","        return arr;","    };","","","/** _.indexOf","* Arguments:","*   1) An array","*   2) A value","* Objectives:","*   1) Return the index of <array> that is the first occurrance of <value>","*   2) Return -1 if <value> is not in <array>","*   3) Do not use [].indexOf()!","* Edge Cases:","*   1) What if <array> has multiple occurances of val?","*   2) What if <val> isn't in <array>?","* Examples:","*   _.indexOf([\"a\",\"b\",\"c\"], \"c\") -> 2","*   _.indexOf([\"a\",\"b\",\"c\"], \"d\") -> -1","*/","_.indexOf = function(array, value) {","    for(var i = 0; i < array.length; i++){","        if(array[i] === value) {","            return i;","        }","    }","    ","    return -1;","};","","/** _.contains","* Arguments:","*   1) An array","*   2) A value","* Objectives:","*   1) Return true if <array> contains <value>","*   2) Return false otherwise","*   3) You must use the ternary operator in your implementation.","* Edge Cases:","*   1) did you use === ?","*   2) what if no <value> is given?","* Examples:","*   _.contains([1,\"two\", 3.14], \"two\") -> true","*/","_.contains = function(array, value) {","        for(var i = 0; i < array.length; i++) {","            if(value === array[i]) {","                return true;","            }","        }","    return false;","};","","/** _.each","* Arguments:","*   1) A collection","*   2) A function","* Objectives:","*   1) if <collection> is an array, call <function> once for each element","*      with the arguments:","*         the element, it's index, <collection>","*   2) if <collection> is an object, call <function> once for each property","*      with the arguments:","*         the property's value, it's key, <collection>","* Examples:","*   _.each([\"a\",\"b\",\"c\"], function(e,i,a){ console.log(e)});","*      -> should log \"a\" \"b\" \"c\" to the console","*/","_.each = function(collection, funct) {","    if(typeof collection === 'object') {","        for (var entry in collection) {","            funct(collection[entry], entry, collection);","        }","    }","return collection;","};","","","/** _.filter","* Arguments:","*   1) An array","*   2) A function","* Objectives:","*   1) call <function> for each element in <array> passing the arguments:","*      the element, it's index, <array>","*   2) return a new array of elements for which calling <function> returned true","* Edge Cases:","*   1) What if <function> returns something other than true or false?","* Examples:","*   _.filter([1,2,3,4,5], function(x){return x%2 === 0}) -> [2,4]","* Extra Credit:","*   use _.each in your implementation","*/","_.filter = function(array, funct) {","    var arr = [];","    for(var i = 0; i < array.length; i++) {","        if(funct(array[i], i, array)) {","            arr.push(array[i]);","        }","    }","};","    ","","/** _.map","* Arguments:","*   1) A collection","*   2) a function","* Objectives:","*   1) call <function> for each element in <collection> passing the arguments:","*        if <collection> is an array:","*            the element, it's index, <collection>","*        if <collection> is an object:","*            the value, it's key, <collection>","*   2) save the return value of each <function> call in a new array","*   3) return the new array","* Examples:","*   _.map([1,2,3,4], function(e){return e * 2}) -> [2,4,6,8]","*/","_.map = function(collection, funct) {","    var array = [];","    if(Array.isArray(collection)){","        for(var i = 0; i < collection.length; i++) {","            array.push(funct(collection[i], i, collection));","        }","    } else if(_.typeOf(collection) === 'object'){ ","        for(var key in collection) {","            array.push(funct(collection[key], key, collection));","        }","    }","    ","    return array;","};","","","/** _.reject","* Arguments:","*   1) An array","*   2) A function","* Objectives:","*   1) call <function> for each element in <array> passing the arguments:","*      the element, it's index, <array>","*   2) return a new array of elements for which calling <function> returned false","*   3) This is the logical inverse if _.filter(), you must use _.filter() in your implementation","* Examples:","*   _.reject([1,2,3,4,5], function(e){return e%2 === 0}) -> [1,3,5]","*/","","_.reject = function(array, funct) {","    var newArray= [];","    var arr = _.filter(array, funct);","        for(var i = 0; i < array.length; i++) {","            if(arr.includes(array[i]) === false) {","                newArray.push(array[i]);","            }","        }","        ","        return newArray;","};","","","/** _.partition","* Arguments:","*   1) An array","*   2) A function","* Objectives:","*   1) Call <function> for each element in <array> passing it the arguments:","*       element, key, <array>","*   2) Return an array that is made up of 2 sub arrays:","*       0) An array that contains all the values for which <function> returned something truthy","*       1) An array that contains all the values for which <function> returned something falsy","* Edge Cases:","*   1) This is going to return an array of arrays.","* Examples:","*   _.partition([1,2,3,4,5], function(element,index,arr){","*     return element % 2 === 0;","*   }); -> [[2,4],[1,3,5]]","}","*/","","_.partition = function(array, funct) {","    return[_.filter(array, funct), _.reject(array, funct)];","};","","","/** _.every","* Arguments:","*   1) A collection","*   2) A function","* Objectives:","*   1) Call <function> for every element of <collection> with the paramaters:","*      if <collection> is an array:","*          current element, it's index, <collection>","*      if <collection> is an object:","*          current value, current key, <collection>","*   2) If the return value of calling <function> for every element is true, return true","*   3) If even one of them returns false, return false","*   4) If <function> is not provided, return true if every element is truthy, otherwise return false","* Edge Cases:","*   1) what if <function> doesn't return a boolean","*   2) What if <function> is not given?","* Examples:","*   _.every([2,4,6], function(e){return e % 2 === 0}) -> true","*   _.every([1,2,3], function(e){return e % 2 === 0}) -> false","*/","_.every = function (collection, funct) {","        if (funct === undefined) {","            funct = function (value, entry, collection) {","                return value;","            };","        } ","        let res = true;","        let gather = function (value, entry, collection) {","            if(funct(value, entry, collection) === false) {","                res = false;","            }","        };","        ","        _.each(collection, gather);","        return res;","};","","/** _.some","* Arguments:","*   1) A collection","*   2) A function","* Objectives:","*   1) Call <function> for every element of <collection> with the paramaters:","*       if <collection> is an array:","*        current element, it's index, <collection>","*       if <collection> is an object:","*        current value, current key, <collection>","*   2) If the return value of calling <function> is true for at least one element, return true","*   3) If it is false for all elements, return false","*   4) If <function> is not provided return true if at least one element is truthy, otherwise return false","* Edge Cases:","*   1) what if <function> doesn't return a boolean","*   2) What if <function> is not given?","* Examples:","*   _.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, funct) {","    if(funct === undefined) {","        funct = function(value, entry, collection) {","            return value;","        };","    }","    ","    let res = false;","    let gather = function(value, entry, collection) {","        if(funct(value, entry, collection)) {","            ","            res = true;","        }","    };","    ","    _.each(collection, gather);","};","","","/** _.pluck","* Arguments:","*   1) An array of objects","*   2) A property","* Objectives:","*   1) Return an array containing the value of <property> for every element in <array>","*   2) You must use _.map() in your implementation.","* Examples:","*   _.pluck([{a: \"one\"}, {a: \"two\"}], \"a\") -> [\"one\", \"two\"]","*/","_.pluck = function(array, property) {","    var arr =  [];","    arr = _.map(array, check);","    ","    function check(value, i) {","        return array[i][property];","    }","return arr;","};","","//////////////////////////////////////////////////////////////////////","// DON'T REMOVE THIS CODE ////////////////////////////////////////////","//////////////////////////////////////////////////////////////////////","","if((typeof process !== 'undefined') &&","   (typeof process.versions.node !== 'undefined')) {","    // here, export any references 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_.extend;"],"id":7}]]},"ace":{"folds":[],"scrolltop":5490,"scrollleft":0,"selection":{"start":{"row":416,"column":33},"end":{"row":416,"column":33},"isBackwards":false},"options":{"guessTabSize":true,"useWrapMode":false,"wrapToView":true},"firstLineState":{"row":391,"state":"start","mode":"ace/mode/javascript"}},"timestamp":1554762888394}