cafe-grader-web Files · node_modules/es5-ext/string/random.js

cafe-grader-web

Location: cafe-grader-web/node_modules/es5-ext/string/random.js

Commit Description:

add model solution

Commit Description:

add model solution

References:

r855:ef5cd5528b8d algo

File last commit:

r789:8cd7e8db7e38 default

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                    node_modules/es5-ext/string/random.js
                
             | 38 lines
             | 1.0 KiB
             | application/javascript 
             | JavascriptLexer
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      "use strict";

      var isValue         = require("../object/is-value")

        , toNaturalNumber = require("../number/to-pos-integer");

      var generated = Object.create(null), random = Math.random, uniqTryLimit = 100;

      var getChunk = function () { return random().toString(36).slice(2); };

      var getString = function (/* length */) {

      	var str = getChunk(), length = arguments[0];

      	if (!isValue(length)) return str;

      	while (str.length < length) str += getChunk();

      	return str.slice(0, length);

      };

      module.exports = function (/* options */) {

      	var options = Object(arguments[0]), length = options.length, isUnique = options.isUnique;

      	if (isValue(length)) length = toNaturalNumber(length);

      	var str = getString(length);

      	if (isUnique) {

      		var count = 0;

      		while (generated[str]) {

      			if (++count === uniqTryLimit) {

      				throw new Error(

      					"Cannot generate random string.\n" +

      						"String.random is not designed to effectively generate many short and " +

      						"unique random strings"

      				);

      			}

      			str = getString(length);

      		}

      		generated[str] = true;

      	}

      	return str;

      };

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				"use strict";

				var isValue = require("../object/is-value")
				, toNaturalNumber = require("../number/to-pos-integer");

				var generated = Object.create(null), random = Math.random, uniqTryLimit = 100;

				var getChunk = function () { return random().toString(36).slice(2); };

				var getString = function (/* length */) {
				var str = getChunk(), length = arguments[0];
				if (!isValue(length)) return str;
				while (str.length < length) str += getChunk();
				return str.slice(0, length);
				};

				module.exports = function (/* options */) {
				var options = Object(arguments[0]), length = options.length, isUnique = options.isUnique;

				if (isValue(length)) length = toNaturalNumber(length);

				var str = getString(length);
				if (isUnique) {
				var count = 0;
				while (generated[str]) {
				if (++count === uniqTryLimit) {
				throw new Error(
				"Cannot generate random string.\n" +
				"String.random is not designed to effectively generate many short and " +
				"unique random strings"
				);
				}
				str = getString(length);
				}
				generated[str] = true;
				}
				return str;
				};