predicates/src/lessThan.js

'use strict';

var handleCurry = require('./utils/handleCurry');

/**
 * Checks whether a value is less than expected number
 *
 * **Aliases** _less_, _lt_
 *
 * @function lessThan
 *
 * @example
 *
 * var isChildAge = is.lessThan(18);
 *
 * isChildAge(10); // true
 * // same as
 * is.lessThan(18, 10); // true
 * isChildAge(18); // false
 * isChildAge(22); // false
 *
 * @param {Number} expected
 * @param {Number} [value]
 * @returns {(Boolean|Predicate)} bool if at least two arguments provided, otherwise a predicate
 */
module.exports = function isLessThan(expected) {
    return handleCurry.call(this, arguments, function isLessThanPredicate(value) {
        return value < expected;
    });
};