predictype
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PredicType is a library of pre-built and tested predicates for TypeScript, covering various data types and operations.
47 lines (46 loc) • 1.95 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.setRelation = setRelation;
const sets_js_1 = require("../../enums/sets.js");
/**
* Checks the relation between two sets (disjoint, intersects, subset, superset) using the specified operation.
*
* @param source The first set.
* @param oper The relation operation to perform (e.g. 'disjoint', 'subset_of').
* @param target The second set.
* @returns True if the relation check is valid according to the operator, otherwise false.
*
* @throws {Error} If the operation is not recognized.
*
* @example
* const a = new Set([1, 2]);
* const b = new Set([2, 3]);
* const c = new Set([4, 5]);
*
* setRelation(a, 'intersects', b); // true
* setRelation(a, 'disjoint', c); // true
* setRelation(a, 'subset_of', b); // true
* setRelation(a, 'superset_of', b); // false
*
* @remarks
* Supported Operators:
* - **DISJOINT**: Sets have no elements in common
* - **INTERSECTS**: Sets have at least one element in common
* - **SUBSET_OF**: First set is a subset of second
* - **SUPERSET_OF**: First set is a superset of second
* - **STRICT_SUBSET_OF**: First set is a strict subset of second
* - **STRICT_SUPERSET_OF**: First set is a strict superset of second
*/
function setRelation(source, oper, target) {
const operators = {
[sets_js_1.SetRelationEnum.SUBSET_OF]: (a, b) => [...a].every((v) => b.has(v)),
[sets_js_1.SetRelationEnum.SUPERSET_OF]: (a, b) => [...b].every((v) => a.has(v)),
[sets_js_1.SetRelationEnum.STRICT_SUBSET_OF]: (a, b) => a.size < b.size && [...a].every((v) => b.has(v)),
[sets_js_1.SetRelationEnum.STRICT_SUPERSET_OF]: (a, b) => a.size > b.size && [...b].every((v) => a.has(v)),
};
const enumOper = typeof oper === 'string' ? oper : oper;
const fn = operators[enumOper];
if (!fn)
throw new Error(`Unknown SetRelation operation: ${oper}`);
return fn(source, target);
}