adaptive-expressions
Version:
Common Expression Language
47 lines • 1.67 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Union = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Return a collection that has all the items from the specified collections.
* To appear in the result, an item can appear in any collection passed to this function.
* If one or more items have the same name, the last item with that name appears in the result.
*/
class Union extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [Union](xref:adaptive-expressions.Union) class.
*/
constructor() {
super(expressionType_1.ExpressionType.Union, Union.evaluator(), returnType_1.ReturnType.Array, Union.validator);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.apply((args) => {
let result = [];
for (const arg of args) {
result = result.concat(arg);
}
return Array.from(new Set(result));
}, functionUtils_1.FunctionUtils.verifyList);
}
/**
* @private
*/
static validator(expression) {
functionUtils_1.FunctionUtils.validateArityAndAnyType(expression, 1, Number.MAX_SAFE_INTEGER, returnType_1.ReturnType.Array);
}
}
exports.Union = Union;
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