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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 | 1x 85x 2x 2x 2x 5x 3x 2x 3x 1x 1x 6x 636x 81x 405x 405x 6x 6x 5x 6x 4x 2x | /**
* Dictionary - an iterable data store
*
* Instantiate with a template type for the key:
* ```
* const store: Dictionary<string> = new Dictionary<string>();
* ```
*/
export class Dictionary<K, T> implements Iterable<any> {
private items: { [index: string]: any } = {};
/**
* Support for / each pattern:
*
* ```
* for (const key of store) {
* const value = store.get(key);
* ...
* }
* ```
*/
public [Symbol.iterator]() {
let pointer: number = 0;
const items: any = this.items;
return {
/**
* @hidden
*/
next(): IteratorResult<any> {
if (pointer < Object.keys(items).length) {
return {
"done": false,
"value": items[Object.keys(items)[pointer++]]
};
}
return {
"done": true,
"value": null
};
}
};
}
/**
* Remove all elements - reset to empty
*/
public clear(): void {
Object.keys(this.items).forEach((key) => {
delete this.items[key];
});
}
/**
* Check if an item exists - by value
* @param value The item required
* @returns
*/
public contains(value: any): boolean {
return this.values().indexOf(value) !== -1;
}
/**
* Check if a key exists
* @param key The key required
* @returns
*/
public exists(key: string): boolean {
return !!this.items[key];
}
/**
* Get an item by key
* @param key The element key
* @returns
*/
public get(key: string): any {
return this.items[key];
}
/**
* The array of keys in the store
* @returns
*/
public keys(): string[] {
return Object.keys(this.items);
}
/**
* Put a new key/value pair
* Overwrites an existing key
* @param key The key
* @param value The value - supports null
* @returns
*/
public put(key: string, value: any): any {
this.items[key] = value;
return value;
}
/**
* Remove an item by key
* @param key The key to remove
* @returns
*/
public remove(key: string): any {
const item = this.items[key];
if (item) {
delete this.items[key];
}
return item;
}
/**
* Report the number of keys in the store
* @returns
*/
public size(): number {
return Object.keys(this.items).length;
}
/**
* The array of values
* @returns
*/
public values(): any[] {
return Object.values(this.items);
}
}
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