adaptive-expressions
Version:
Common Expression Language
50 lines • 1.87 kB
JavaScript
;
/**
* @module adaptive-expressions
*/
/**
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.Round = void 0;
const expressionEvaluator_1 = require("../expressionEvaluator");
const expressionType_1 = require("../expressionType");
const functionUtils_1 = require("../functionUtils");
const returnType_1 = require("../returnType");
/**
* Rounds a number value to the nearest integer.
*/
class Round extends expressionEvaluator_1.ExpressionEvaluator {
/**
* Initializes a new instance of the [Round](xref:adaptive-expressions.Round) class.
*/
constructor() {
super(expressionType_1.ExpressionType.Round, Round.evaluator(), returnType_1.ReturnType.Number, functionUtils_1.FunctionUtils.validateUnaryOrBinaryNumber);
}
/**
* @private
*/
static evaluator() {
return functionUtils_1.FunctionUtils.applyWithError((args) => {
let result;
let error;
if (args.length === 2 && !Number.isInteger(args[1])) {
error = `The second parameter ${args[1]} must be an integer.`;
}
if (!error) {
const digits = args.length === 2 ? args[1] : 0;
if (digits < 0 || digits > 15) {
error = `The second parameter ${args[1]} must be an integer between 0 and 15;`;
}
else {
result = Round.roundToPrecision(args[0], digits);
}
}
return { value: result, error };
}, functionUtils_1.FunctionUtils.verifyNumber);
}
}
exports.Round = Round;
Round.roundToPrecision = (num, digits) => Math.round(num * Math.pow(10, digits)) / Math.pow(10, digits);
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