Type guard that checks if an array contains at least one element
The array to validate
A type predicate indicating if the array is non-empty
const items = [1, 2, 3];if (safeValidate(items)) { // items is typed as NonEmptyArray<number> here const first = items[0]; // Safe access items.map(x => x * 2); // Safe to use array methods}const empty: string[] = [];if (!safeValidate(empty)) { // Handle empty array case} Copy
const items = [1, 2, 3];if (safeValidate(items)) { // items is typed as NonEmptyArray<number> here const first = items[0]; // Safe access items.map(x => x * 2); // Safe to use array methods}const empty: string[] = [];if (!safeValidate(empty)) { // Handle empty array case}
Type guard that checks if an array contains at least one element