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19 lines
494 B
TypeScript
19 lines
494 B
TypeScript
export const isTruthy = <T>(i: T | 0 | '' | false | null | undefined): i is T => !!i;
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export const fastStringArrayJoin = (arr: string[], sep: string) => {
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let result = '';
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for (let i = 0, len = arr.length; i < len; i++) {
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if (i !== 0) {
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result += sep;
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}
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result += arr[i];
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}
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return result;
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};
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export const fastStringArrayJoin2 = (arr: string[], sep: string) => {
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return arr.reduce((acc, cur, index) => {
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return index === 0 ? cur : acc + sep + cur;
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}, '');
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};
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