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export function checkedIndexOf<T>(o: T | number, arr: T[], type: string = "object"): 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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