31 lines
726 B
TypeScript
31 lines
726 B
TypeScript
export function checkedIndexOf<T>(
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o: T | number,
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arr: T[],
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type: string = "object"
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): number {
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let idx: number;
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if (typeof o === "number") {
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idx = o;
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} else if (typeof (o as any).id === "number") {
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idx = (o as any).id;
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} else {
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idx = arr.indexOf(o);
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}
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if (idx < 0 || idx > arr.length) {
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throw new Error(`Invalid ${type} specified: ${o}`);
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}
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return idx;
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}
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export function getRandomId() {
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return Math.floor(Math.random() * 1000000000);
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}
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export function applyMixins(derivedCtor: any, baseCtors: any[]) {
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baseCtors.forEach(baseCtor => {
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Object.getOwnPropertyNames(baseCtor.prototype).forEach(name => {
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derivedCtor.prototype[name] = baseCtor.prototype[name];
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});
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});
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}
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