ts-generic-collections-linq
Version:
TypeScript library provides strongly-typed, queryable collections.
661 lines • 45.7 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
import { List } from './list';
import { Group, objCompare, ITEM_NOT_FOUND_MSG, MULTIPLE_INSTANCES_FOUND_MSG } from './common';
/**
* @record
* @template TKey, TValue
*/
export function IDictionary() { }
if (false) {
/**
* @param {?} key
* @param {?} value
* @return {?}
*/
IDictionary.prototype.add = function (key, value) { };
/**
* @param {?} items
* @return {?}
*/
IDictionary.prototype.addRange = function (items) { };
/**
* @param {?} predicate
* @return {?}
*/
IDictionary.prototype.remove = function (predicate) { };
/**
* @param {?} index
* @return {?}
*/
IDictionary.prototype.removeAt = function (index) { };
/**
* @return {?}
*/
IDictionary.prototype.clear = function () { };
/**
* @param {?} key
* @return {?}
*/
IDictionary.prototype.containsKey = function (key) { };
/**
* @param {?} value
* @return {?}
*/
IDictionary.prototype.containsValue = function (value) { };
/**
* @param {?} key
* @return {?}
*/
IDictionary.prototype.tryGetValue = function (key) { };
}
/**
* @template TKey, TValue
*/
export class Dictionary {
/**
* @param {?=} list
*/
constructor(list = null) {
this.list = new Array();
if (list) {
this.list = list;
}
}
/* IList */
/**
* @param {?} key
* @param {?} value
* @return {?}
*/
add(key, value) {
/** @type {?} */
let pair = new KeyValuePair(key, value);
if (this.containsKey(key)) {
throw "Duplicate key. Cannot add.";
}
this.list.push(pair);
}
/**
* @param {?} items
* @return {?}
*/
addRange(items) {
items.forEach((/**
* @param {?} x
* @return {?}
*/
x => this.add(x.key, x.value)));
}
/**
* @param {?} index
* @return {?}
*/
removeAt(index) {
this.list.splice(index, 1);
}
/**
* @return {?}
*/
clear() {
this.list = new Array();
}
/**
* @param {?} predicate
* @return {?}
*/
remove(predicate) {
/** @type {?} */
let temp = new Array();
this.list.forEach((/**
* @param {?} element
* @return {?}
*/
element => {
if (!predicate(element)) {
temp.push(element);
}
}));
this.list = temp;
}
/**
* @param {?} key
* @return {?}
*/
containsKey(key) {
return this.any((/**
* @param {?} x
* @return {?}
*/
x => objCompare(x.key, key)));
}
/**
* @param {?} value
* @return {?}
*/
containsValue(value) {
return this.any((/**
* @param {?} x
* @return {?}
*/
x => objCompare(x.value, value)));
}
/**
* @param {?} key
* @return {?}
*/
tryGetValue(key) {
/** @type {?} */
let item = this.singleOrDefault((/**
* @param {?} x
* @return {?}
*/
x => objCompare(x.key, key)));
if (item) {
return item.value;
}
return null;
}
/* IEnumerable */
/**
* @return {?}
*/
asEnumerable() {
return this;
}
/**
* @return {?}
*/
get length() {
return this.list.length;
}
/**
* @param {?} index
* @return {?}
*/
elementAt(index) {
try {
return this.list[index];
}
catch (e) {
return null;
}
}
/**
* @param {?=} predicate
* @return {?}
*/
any(predicate) {
if (!predicate) {
return this.list.length > 0;
}
for (let i = 0; i < this.list.length; i++) {
if (predicate(this.list[i])) {
return true;
}
}
return false;
}
/**
* @param {?=} predicate
* @return {?}
*/
all(predicate) {
if (!predicate) {
return this.list.length > 0;
}
for (let i = 0; i < this.list.length; i++) {
if (!predicate(this.list[i])) {
return false;
}
}
return true;
}
/**
* @param {?=} predicate
* @return {?}
*/
single(predicate = null) {
if (this.list.length <= 0) {
throw ITEM_NOT_FOUND_MSG;
}
if (predicate) {
/** @type {?} */
let item = this.singleOrDefault(predicate);
if (!item) {
throw ITEM_NOT_FOUND_MSG;
}
return item;
}
return this.list[0];
}
/**
* @param {?=} predicate
* @return {?}
*/
first(predicate = null) {
if (this.list.length <= 0) {
throw ITEM_NOT_FOUND_MSG;
}
if (predicate) {
/** @type {?} */
let item = this.firstOrDefault(predicate);
if (!item) {
throw ITEM_NOT_FOUND_MSG;
}
return item;
}
return this.list[0];
}
/**
* @param {?} predicate
* @return {?}
*/
last(predicate) {
if (this.list.length <= 0) {
throw ITEM_NOT_FOUND_MSG;
}
if (predicate) {
/** @type {?} */
let item = this.lastOrDefault(predicate);
if (!item) {
throw ITEM_NOT_FOUND_MSG;
}
return item;
}
return this.list[this.list.length - 1];
}
/**
* @param {?} predicate
* @return {?}
*/
singleOrDefault(predicate) {
/** @type {?} */
let temp = new Array();
this.list.filter((/**
* @param {?} element
* @return {?}
*/
element => {
if (predicate(element)) {
temp.push(element);
}
}));
if (temp.length > 1) {
throw MULTIPLE_INSTANCES_FOUND_MSG;
}
if (temp.length <= 0) {
return null;
}
return temp[0];
}
/**
* @param {?} predicate
* @return {?}
*/
firstOrDefault(predicate) {
for (let i = 0; i < this.length; i++) {
/** @type {?} */
let item = this.list[i];
if (predicate(item)) {
return item;
}
}
return null;
}
/**
* @param {?} predicate
* @return {?}
*/
lastOrDefault(predicate) {
for (let i = this.length; i >= 0; i--) {
/** @type {?} */
let item = this.list[i - 1];
if (predicate(item)) {
return item;
}
}
return null;
}
/**
* @param {?} predicate
* @return {?}
*/
where(predicate) {
/** @type {?} */
let temp = new Dictionary();
this.list.filter((/**
* @param {?} element
* @return {?}
*/
element => {
if (predicate(element)) {
temp.add(element.key, element.value);
}
}));
return temp;
}
/**
* @template TResult
* @param {?} predicate
* @return {?}
*/
select(predicate) {
/** @type {?} */
let temp = new List();
this.forEach((/**
* @param {?} x
* @return {?}
*/
x => temp.add(predicate(x))));
return temp;
}
/**
* @param {?} predicate
* @return {?}
*/
forEach(predicate) {
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => predicate(x)));
}
/**
* @return {?}
*/
toArray() {
return this.list.slice();
}
/**
* @template TOuter, TMatch, TResult
* @param {?} outer
* @param {?} conditionInner
* @param {?} conditionOuter
* @param {?} select
* @param {?=} leftJoin
* @return {?}
*/
join(outer, conditionInner, conditionOuter, select, leftJoin = false) {
/** @type {?} */
let resultList = new List();
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => {
/** @type {?} */
let outerEntries = outer.toArray().filter((/**
* @param {?} y
* @return {?}
*/
y => conditionInner(x) === conditionOuter(y)));
if (leftJoin && outerEntries && outerEntries.length <= 0) {
resultList.add(select(x, null));
}
else {
outerEntries.forEach((/**
* @param {?} z
* @return {?}
*/
z => resultList.add(select(x, z))));
}
}));
return resultList;
}
/**
* @param {?} predicate
* @return {?}
*/
groupBy(predicate) {
/** @type {?} */
let groups = {};
this.list.forEach((/**
* @param {?} o
* @return {?}
*/
function (o) {
/** @type {?} */
var group = JSON.stringify(predicate(o));
groups[group] = groups[group] || [];
groups[group].push(o);
}));
/** @type {?} */
let g = Object.keys(groups).map((/**
* @param {?} group
* @return {?}
*/
function (group) {
/** @type {?} */
let a = group.substr(1, group.length - 2);
/** @type {?} */
let grp = new Group(new List(a.split(',')).select((/**
* @param {?} x
* @return {?}
*/
x => x.replace(/^(")?(.*?)(")?$/ig, "$2"))).toArray(), groups[group]);
return grp;
}));
return new List(g);
}
/**
* @template TResult
* @param {?} predicate
* @return {?}
*/
selectMany(predicate) {
return this.list.reduce((/**
* @param {?} out
* @param {?} inx
* @return {?}
*/
(out, inx) => {
/** @type {?} */
var items = predicate(inx);
out.addRange(items);
return out;
}), new List(new Array()));
}
/**
* @param {?} comparer
* @return {?}
*/
orderBy(comparer) {
/** @type {?} */
let temp = this.list.sort((/**
* @param {?} x
* @param {?} y
* @return {?}
*/
(x, y) => comparer.compare(x, y)));
return new List(temp);
}
/**
* @param {?} comparer
* @return {?}
*/
distinct(comparer) {
/** @type {?} */
let uniques = new List();
this.forEach((/**
* @param {?} x
* @return {?}
*/
x => {
if (uniques.length > 0) {
if (!uniques.any((/**
* @param {?} y
* @return {?}
*/
y => comparer.equals(x, y)))) {
uniques.add(x);
}
}
else {
uniques.add(x);
}
}));
return uniques;
}
/**
* @param {?} list
* @return {?}
*/
union(list) {
this.addRange(list.toArray());
return this;
}
/**
* @return {?}
*/
reverse() {
return new List(this.list.slice().reverse());
}
/**
* @param {?} no
* @return {?}
*/
skip(no) {
if (no > 0) {
return new Dictionary(this.list.slice(no, this.list.length - 1));
}
return this;
}
/**
* @param {?} no
* @return {?}
*/
take(no) {
if (no > 0) {
return new Dictionary(this.list.slice(0, no));
}
return this;
}
/**
* @param {?} predicate
* @return {?}
*/
sum(predicate) {
/** @type {?} */
let sum = 0;
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => sum = sum + predicate(x)));
return sum;
}
/**
* @param {?} predicate
* @return {?}
*/
avg(predicate) {
return this.sum(predicate) / this.length;
}
/**
* @param {?} predicate
* @return {?}
*/
min(predicate) {
/** @type {?} */
let min = 0;
/** @type {?} */
let i = 0;
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => {
if (i == 0) {
min = predicate(x);
}
else {
/** @type {?} */
let val = predicate(x);
if (val < min) {
min = val;
}
}
i++;
}));
return min;
}
/**
* @param {?} predicate
* @return {?}
*/
max(predicate) {
/** @type {?} */
let max = 0;
/** @type {?} */
let i = 0;
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => {
if (i == 0) {
max = predicate(x);
}
else {
/** @type {?} */
let val = predicate(x);
if (val > max) {
max = val;
}
}
i++;
}));
return max;
}
/**
* @param {?=} predicate
* @return {?}
*/
count(predicate = null) {
if (!predicate) {
return this.length;
}
/** @type {?} */
let count = 0;
this.list.forEach((/**
* @param {?} x
* @return {?}
*/
x => {
if (predicate(x)) {
count++;
}
}));
return count;
}
}
if (false) {
/**
* @type {?}
* @private
*/
Dictionary.prototype.list;
}
/**
* @template TKey, TValue
*/
export class KeyValuePair {
/**
* @param {?} key
* @param {?} value
*/
constructor(key, value) {
this.key = key;
this.value = value;
}
}
if (false) {
/** @type {?} */
KeyValuePair.prototype.key;
/** @type {?} */
KeyValuePair.prototype.value;
}
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{ IEnumerable, IComparer, IEqualityComparer } from './interfaces';\r\nimport { List } from './list';\r\nimport { Group, objCompare, ITEM_NOT_FOUND_MSG, MULTIPLE_INSTANCES_FOUND_MSG } from './common';\r\n\r\nexport interface IDictionary<TKey, TValue> extends IEnumerable<KeyValuePair<TKey, TValue>> {\r\n    add(key: TKey, value: TValue) : void;\r\n    addRange(items: KeyValuePair<TKey, TValue>[]) : void;\r\n    remove(predicate: (item:KeyValuePair<TKey, TValue>) => boolean) : void;\r\n    removeAt(index: number) : void;\r\n    clear() : void;\r\n\r\n    containsKey(key: TKey) : boolean;\r\n    containsValue(value: TValue) : boolean;\r\n    tryGetValue(key: TKey) : TValue;\r\n}\r\n\r\nexport class Dictionary<TKey, TValue> implements IDictionary<TKey, TValue>\r\n{\r\n    private list: Array<KeyValuePair<TKey, TValue>> = new Array<KeyValuePair<TKey, TValue>>();\r\n\r\n    constructor(list: Array<KeyValuePair<TKey, TValue>> = null) {\r\n        if (list) {\r\n            this.list = list;\r\n        }        \r\n    }\r\n\r\n    /* IList */\r\n\r\n    add(key: TKey, value: TValue) : void {\r\n        let pair = new KeyValuePair<TKey, TValue>(key, value);\r\n\r\n        if (this.containsKey(key)) {\r\n            throw \"Duplicate key. Cannot add.\"\r\n        }\r\n\r\n        this.list.push(pair);\r\n    }\r\n\r\n    addRange(items: KeyValuePair<TKey, TValue>[]) : void {\r\n        items.forEach(x => this.add(x.key, x.value));\r\n    }\r\n\r\n    removeAt(index: number) : void {\r\n        this.list.splice(index, 1);\r\n    }\r\n\r\n    clear() : void {\r\n        this.list = new Array<KeyValuePair<TKey, TValue>>();\r\n    }    \r\n\r\n    remove(predicate: (item:KeyValuePair<TKey, TValue>) => boolean) : void {\r\n        let temp = new Array<KeyValuePair<TKey, TValue>>();\r\n\r\n        this.list.forEach(element => {\r\n            if (!predicate(element))\r\n            {\r\n                temp.push(element);\r\n            }\r\n        });\r\n\r\n        this.list = temp;\r\n    }    \r\n\r\n    containsKey(key: TKey) : boolean {\r\n        return this.any(x => objCompare(x.key, key));\r\n    }\r\n\r\n    containsValue(value: TValue) : boolean {\r\n        return this.any(x => objCompare(x.value, value));\r\n    }\r\n\r\n    tryGetValue(key: TKey) : TValue {\r\n        let item = this.singleOrDefault(x => objCompare(x.key, key));\r\n\r\n        if (item) {\r\n            return item.value;\r\n        }\r\n\r\n        return null;\r\n    }\r\n\r\n    /* IEnumerable */\r\n\r\n    asEnumerable() : IEnumerable<KeyValuePair<TKey, TValue>> {\r\n        return this;\r\n    }\r\n\r\n    get length(): number {\r\n        return this.list.length;\r\n    }\r\n\r\n    elementAt(index: number) : KeyValuePair<TKey, TValue> {\r\n        try {\r\n            return this.list[index];\r\n        }\r\n        catch (e) {\r\n            return null;\r\n        }\r\n    }    \r\n\r\n    any(predicate?: (item: KeyValuePair<TKey, TValue>)=> boolean) : boolean {\r\n        if (!predicate) {\r\n            return this.list.length > 0;\r\n        }\r\n\r\n        for (let i=0; i<this.list.length; i++) {\r\n            if (predicate(this.list[i]))\r\n            {\r\n                return true;\r\n            }\r\n        }\r\n        return false;\r\n    }\r\n\r\n    all(predicate?: (item: KeyValuePair<TKey, TValue>)=> boolean) : boolean {\r\n        if (!predicate) {\r\n            return this.list.length > 0;\r\n        }\r\n        \r\n        for (let i=0; i<this.list.length; i++) {\r\n            if (!predicate(this.list[i]))\r\n            {\r\n                return false;\r\n            }\r\n        }\r\n        return true;\r\n    }    \r\n\r\n    single(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean = null) : KeyValuePair<TKey, TValue> {\r\n        if (this.list.length <= 0) {\r\n            throw ITEM_NOT_FOUND_MSG;\r\n        }\r\n\r\n        if (predicate) {\r\n            let item = this.singleOrDefault(predicate);\r\n\r\n            if (!item) {\r\n                throw ITEM_NOT_FOUND_MSG;\r\n            }\r\n\r\n            return item;\r\n        }\r\n        \r\n        return this.list[0];\r\n    }\r\n\r\n    first(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean = null) : KeyValuePair<TKey, TValue> {\r\n        if (this.list.length <= 0) {\r\n            throw ITEM_NOT_FOUND_MSG;\r\n        }\r\n\r\n        if (predicate) {\r\n            let item = this.firstOrDefault(predicate);\r\n\r\n            if (!item) {\r\n                throw ITEM_NOT_FOUND_MSG;\r\n            }\r\n\r\n            return item;\r\n        }\r\n        \r\n        return this.list[0];\r\n    }\r\n    \r\n    last(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean) : KeyValuePair<TKey, TValue> {\r\n        if (this.list.length <= 0) {\r\n            throw ITEM_NOT_FOUND_MSG;\r\n        }\r\n\r\n        if (predicate) {\r\n            let item = this.lastOrDefault(predicate);\r\n\r\n            if (!item) {\r\n                throw ITEM_NOT_FOUND_MSG;\r\n            }\r\n\r\n            return item;\r\n        }\r\n\r\n        return this.list[this.list.length - 1];\r\n    }    \r\n\r\n    singleOrDefault(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean) : KeyValuePair<TKey, TValue> {\r\n        let temp = new Array<KeyValuePair<TKey, TValue>>();\r\n\r\n        this.list.filter(element => {\r\n            if (predicate(element))\r\n            {\r\n                temp.push(element);\r\n            }\r\n        });\r\n\r\n        if (temp.length > 1) {\r\n            throw MULTIPLE_INSTANCES_FOUND_MSG;\r\n        }\r\n\r\n        if (temp.length <= 0) {\r\n            return null;\r\n        }\r\n\r\n        return temp[0];\r\n    }    \r\n\r\n    firstOrDefault(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean) : KeyValuePair<TKey, TValue> {        \r\n        for (let i=0; i<this.length; i++) {\r\n            let item = this.list[i];\r\n            if (predicate(item))\r\n            {\r\n                return item;\r\n            }\r\n        }\r\n\r\n        return null;\r\n    }\r\n\r\n    lastOrDefault(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean) : KeyValuePair<TKey, TValue> {\r\n        for (let i=this.length; i>=0; i--) {\r\n            let item = this.list[i - 1];\r\n            if (predicate(item))\r\n            {\r\n                return item;\r\n            }\r\n        }\r\n\r\n        return null;\r\n    }    \r\n\r\n    where(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean) : IDictionary<TKey, TValue> {\r\n        let temp = new Dictionary<TKey, TValue>();\r\n\r\n        this.list.filter(element => {\r\n            if (predicate(element))\r\n            {\r\n                temp.add(element.key, element.value);\r\n            }\r\n        });\r\n\r\n        return temp;\r\n    }\r\n\r\n    select<TResult>(predicate: (item: KeyValuePair<TKey, TValue>)=> TResult) : IEnumerable<TResult> {\r\n        let temp = new List<TResult>();\r\n\r\n        this.forEach(x => temp.add(predicate(x)));\r\n\r\n        return temp;\r\n    }\r\n\r\n    forEach(predicate: (item: KeyValuePair<TKey, TValue>)=> void) : void {\r\n        this.list.forEach(x => predicate(x));\r\n    }\r\n\r\n    toArray() : Array<KeyValuePair<TKey, TValue>> {\r\n        return this.list.slice();\r\n    }\r\n\r\n    join<TOuter, TMatch, TResult>(outer: IEnumerable<TOuter>, conditionInner: (item: KeyValuePair<TKey, TValue>)=> TMatch, \r\n                                    conditionOuter: (item: TOuter)=> TMatch, select: (x: KeyValuePair<TKey, TValue>, y:TOuter)=> TResult, leftJoin: boolean = false) : IEnumerable<TResult> {\r\n        let resultList = new List<TResult>();\r\n\r\n        this.list.forEach(x => {\r\n            let outerEntries = outer.toArray().filter(y => conditionInner(x) === conditionOuter(y));\r\n\r\n            if (leftJoin && outerEntries && outerEntries.length <= 0) {\r\n                resultList.add(select(x, null));\r\n            }\r\n            else {\r\n                outerEntries.forEach(z => resultList.add(select(x, z)));\r\n            }\r\n        })\r\n\r\n        return resultList;\r\n    }\r\n\r\n    groupBy(predicate: (item: KeyValuePair<TKey, TValue>) => Array<any>) : IEnumerable<Group<KeyValuePair<TKey, TValue>>> {\r\n        let groups = {};\r\n        this.list.forEach(function (o) {\r\n          var group = JSON.stringify(predicate(o));\r\n          groups[group] = groups[group] || [];\r\n          groups[group].push(o);\r\n        });\r\n        let g = Object.keys(groups).map(function (group) {                \r\n            let a = group.substr(1, group.length - 2);\r\n            \r\n            let grp= new Group<KeyValuePair<TKey, TValue>>(new List(a.split(',')).select(x => x.replace(/^(\")?(.*?)(\")?$/ig, \"$2\")).toArray(), \r\n                                    groups[group]);            \r\n\r\n            return grp;\r\n        });\r\n\r\n        return new List<Group<KeyValuePair<TKey, TValue>>>(g);        \r\n    }\r\n\r\n    selectMany<TResult>(predicate: (item: KeyValuePair<TKey, TValue>)=> Array<TResult>) : IEnumerable<TResult> {\r\n        return this.list.reduce((out, inx) => {\r\n            var items = predicate(inx);\r\n            out.addRange(items);\r\n            return out;\r\n          }, new List<TResult>(new Array<TResult>()));\r\n    }\r\n\r\n    orderBy(comparer: IComparer<KeyValuePair<TKey, TValue>>) : IEnumerable<KeyValuePair<TKey, TValue>> {\r\n        let temp = this.list.sort((x,y) => comparer.compare(x, y));\r\n\r\n        return new List<KeyValuePair<TKey, TValue>>(temp);\r\n    }\r\n\r\n    distinct(comparer: IEqualityComparer<KeyValuePair<TKey, TValue>>) : IEnumerable<KeyValuePair<TKey, TValue>> {\r\n        let uniques = new List<KeyValuePair<TKey, TValue>>();\r\n        this.forEach(x => {\r\n            if (uniques.length > 0) {\r\n                if (!uniques.any(y => comparer.equals(x, y)))\r\n                {\r\n                    uniques.add(x);\r\n                }               \r\n            }\r\n            else {\r\n                uniques.add(x);\r\n            }            \r\n        });\r\n\r\n        return uniques;\r\n    }\r\n\r\n    union(list: IEnumerable<KeyValuePair<TKey, TValue>>) : IDictionary<TKey, TValue> {\r\n         this.addRange(list.toArray());\r\n\r\n         return this;\r\n    }    \r\n\r\n    reverse(): IEnumerable<KeyValuePair<TKey, TValue>> {\r\n        return new List<KeyValuePair<TKey, TValue>>(this.list.slice().reverse());\r\n    }\r\n\r\n    skip(no: number) : IDictionary<TKey, TValue> {\r\n        if (no > 0) {\r\n            return new Dictionary(this.list.slice(no, this.list.length - 1));\r\n        }\r\n        \r\n        return this;\r\n    }\r\n\r\n    take(no: number) : IDictionary<TKey, TValue> {\r\n        if (no > 0) {\r\n            return new Dictionary(this.list.slice(0, no));\r\n        }        \r\n\r\n        return this;\r\n    }    \r\n\r\n    sum(predicate: (item: KeyValuePair<TKey, TValue>)=> number) : number {\r\n        let sum: number = 0;\r\n        this.list.forEach(x => sum = sum + predicate(x));\r\n\r\n        return sum;\r\n    }\r\n\r\n    avg(predicate: (item: KeyValuePair<TKey, TValue>)=> number) : number {        \r\n        return this.sum(predicate) / this.length;\r\n    }\r\n\r\n    min(predicate: (item: KeyValuePair<TKey, TValue>)=> number) : number {\r\n        let min: number = 0;\r\n        let i = 0;\r\n        this.list.forEach(x => \r\n        {\r\n            if (i == 0) {\r\n                min = predicate(x);\r\n            }\r\n            else {\r\n                let val = predicate(x);\r\n                if (val < min) {\r\n                    min = val;\r\n                }\r\n            }            \r\n            i++;\r\n        });\r\n\r\n        return min;\r\n    }\r\n    \r\n    max(predicate: (item: KeyValuePair<TKey, TValue>)=> number) : number {\r\n        let max: number = 0;\r\n        let i = 0;\r\n        this.list.forEach(x => \r\n        {\r\n            if (i == 0) {\r\n                max = predicate(x);\r\n            }\r\n            else {\r\n                let val = predicate(x);\r\n                if (val > max) {\r\n                    max = val;\r\n                }\r\n            }            \r\n            i++;\r\n        });\r\n\r\n        return max;\r\n    }\r\n\r\n    count(predicate: (item: KeyValuePair<TKey, TValue>)=> boolean = null) : number {\r\n        if (!predicate) {\r\n            return this.length;\r\n        }\r\n\r\n        let count: number = 0;\r\n        this.list.forEach(x => {\r\n            if(predicate(x)) {\r\n                count++;\r\n            }\r\n        });\r\n\r\n        return count;\r\n    }    \r\n}\r\n\r\nexport class KeyValuePair<TKey, TValue> {\r\n    key: TKey;\r\n    value: TValue;\r\n\r\n    constructor(key: TKey, value: TValue) {\r\n        this.key = key;\r\n        this.value = value;\r\n    }\r\n}"]}