pip-services3-commons-node
Version:
Portable abstractions and patterns for Pip.Services in Node.js
69 lines • 2.71 kB
JavaScript
;
/** @module random */
Object.defineProperty(exports, "__esModule", { value: true });
/**
* Random generator for integer values.
*
* ### Example ###
*
* let value1 = RandomInteger.nextInteger(5, 10); // Possible result: 7
* let value2 = RandomInteger.nextInteger(10); // Possible result: 3
* let value3 = RandomInteger.updateInteger(10, 3); // Possible result: 9
*/
var RandomInteger = /** @class */ (function () {
function RandomInteger() {
}
/**
* Generates a integer in the range ['min', 'max']. If 'max' is omitted, then the range will be set to [0, 'min'].
*
* @param min minimum value of the integer that will be generated.
* If 'max' is omitted, then 'max' is set to 'min' and 'min' is set to 0.
* @param max (optional) maximum value of the float that will be generated. Defaults to 'min' if omitted.
* @returns generated random integer value.
*/
RandomInteger.nextInteger = function (min, max) {
if (max === void 0) { max = null; }
if (max == null) {
max = min;
min = 0;
}
if (max - min <= 0)
return min;
return Math.floor(min + Math.random() * (max - min));
};
/**
* Updates (drifts) a integer value within specified range defined
*
* @param value a integer value to drift.
* @param range (optional) a range. Default: 10% of the value
*/
RandomInteger.updateInteger = function (value, range) {
if (range === void 0) { range = null; }
if (range == null)
range = 0;
range = range == 0 ? Math.floor(0.1 * value) : range;
var minValue = value - range;
var maxValue = value + range;
return RandomInteger.nextInteger(minValue, maxValue);
};
/**
* Generates a random sequence of integers starting from 0 like: [0,1,2,3...??]
*
* @param min minimum value of the integer that will be generated.
* If 'max' is omitted, then 'max' is set to 'min' and 'min' is set to 0.
* @param max (optional) maximum value of the float that will be generated. Defaults to 'min' if omitted.
* @returns generated array of integers.
*/
RandomInteger.sequence = function (min, max) {
if (max === void 0) { max = null; }
max = max != null ? max : min;
var count = RandomInteger.nextInteger(min, max);
var result = [];
for (var i = 0; i < count; i++)
result.push(i);
return result;
};
return RandomInteger;
}());
exports.RandomInteger = RandomInteger;
//# sourceMappingURL=RandomInteger.js.map