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util.ts
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util.ts
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/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
const DASH_CASE_REGEXP = /-+([a-z0-9])/g;
export function dashCaseToCamelCase(input: string): string {
return input.replace(DASH_CASE_REGEXP, (...m: any[]) => m[1].toUpperCase());
}
export function splitAtColon(input: string, defaultValues: string[]): string[] {
return _splitAt(input, ':', defaultValues);
}
export function splitAtPeriod(input: string, defaultValues: string[]): string[] {
return _splitAt(input, '.', defaultValues);
}
function _splitAt(input: string, character: string, defaultValues: string[]): string[] {
const characterIndex = input.indexOf(character);
if (characterIndex == -1) return defaultValues;
return [input.slice(0, characterIndex).trim(), input.slice(characterIndex + 1).trim()];
}
export function noUndefined<T>(val: T|undefined): T {
return val === undefined ? null! : val;
}
export function error(msg: string): never {
throw new Error(`Internal Error: ${msg}`);
}
// Escape characters that have a special meaning in Regular Expressions
export function escapeRegExp(s: string): string {
return s.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
}
export type Byte = number;
export function utf8Encode(str: string): Byte[] {
let encoded: Byte[] = [];
for (let index = 0; index < str.length; index++) {
let codePoint = str.charCodeAt(index);
// decode surrogate
// see https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
if (codePoint >= 0xd800 && codePoint <= 0xdbff && str.length > (index + 1)) {
const low = str.charCodeAt(index + 1);
if (low >= 0xdc00 && low <= 0xdfff) {
index++;
codePoint = ((codePoint - 0xd800) << 10) + low - 0xdc00 + 0x10000;
}
}
if (codePoint <= 0x7f) {
encoded.push(codePoint);
} else if (codePoint <= 0x7ff) {
encoded.push(((codePoint >> 6) & 0x1F) | 0xc0, (codePoint & 0x3f) | 0x80);
} else if (codePoint <= 0xffff) {
encoded.push(
(codePoint >> 12) | 0xe0, ((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);
} else if (codePoint <= 0x1fffff) {
encoded.push(
((codePoint >> 18) & 0x07) | 0xf0, ((codePoint >> 12) & 0x3f) | 0x80,
((codePoint >> 6) & 0x3f) | 0x80, (codePoint & 0x3f) | 0x80);
}
}
return encoded;
}
export function stringify(token: any): string {
if (typeof token === 'string') {
return token;
}
if (Array.isArray(token)) {
return '[' + token.map(stringify).join(', ') + ']';
}
if (token == null) {
return '' + token;
}
if (token.overriddenName) {
return `${token.overriddenName}`;
}
if (token.name) {
return `${token.name}`;
}
if (!token.toString) {
return 'object';
}
// WARNING: do not try to `JSON.stringify(token)` here
// see https://github.com/angular/angular/issues/23440
const res = token.toString();
if (res == null) {
return '' + res;
}
const newLineIndex = res.indexOf('\n');
return newLineIndex === -1 ? res : res.substring(0, newLineIndex);
}
export class Version {
public readonly major: string;
public readonly minor: string;
public readonly patch: string;
constructor(public full: string) {
const splits = full.split('.');
this.major = splits[0];
this.minor = splits[1];
this.patch = splits.slice(2).join('.');
}
}
export interface Console {
log(message: string): void;
warn(message: string): void;
}
const _global: {[name: string]: any} = globalThis;
export {_global as global};
export function newArray<T = any>(size: number): T[];
export function newArray<T>(size: number, value: T): T[];
export function newArray<T>(size: number, value?: T): T[] {
const list: T[] = [];
for (let i = 0; i < size; i++) {
list.push(value!);
}
return list;
}
/**
* Partitions a given array into 2 arrays, based on a boolean value returned by the condition
* function.
*
* @param arr Input array that should be partitioned
* @param conditionFn Condition function that is called for each item in a given array and returns a
* boolean value.
*/
export function partitionArray<T, F = T>(
arr: (T|F)[], conditionFn: (value: T|F) => boolean): [T[], F[]] {
const truthy: T[] = [];
const falsy: F[] = [];
for (const item of arr) {
(conditionFn(item) ? truthy : falsy).push(item as any);
}
return [truthy, falsy];
}