| /* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| |
| /** |
| File Name: 15.5.4.8-3.js |
| ECMA Section: 15.5.4.8 String.prototype.split( separator ) |
| Description: |
| |
| Returns an Array object into which substrings of the result of converting |
| this object to a string have been stored. The substrings are determined by |
| searching from left to right for occurrences of the given separator; these |
| occurrences are not part of any substring in the returned array, but serve |
| to divide up this string value. The separator may be a string of any length. |
| |
| As a special case, if the separator is the empty string, the string is split |
| up into individual characters; the length of the result array equals the |
| length of the string, and each substring contains one character. |
| |
| If the separator is not supplied, then the result array contains just one |
| string, which is the string. |
| |
| When the split method is called with one argument separator, the following steps are taken: |
| |
| 1. Call ToString, giving it the this value as its argument. |
| 2. Create a new Array object of length 0 and call it A. |
| 3. If separator is not supplied, call the [[Put]] method of A with 0 and |
| Result(1) as arguments, and then return A. |
| 4. Call ToString(separator). |
| 5. Compute the number of characters in Result(1). |
| 6. Compute the number of characters in the string that is Result(4). |
| 7. Let p be 0. |
| 8. If Result(6) is zero (the separator string is empty), go to step 17. |
| 9. Compute the smallest possible integer k not smaller than p such that |
| k+Result(6) is not greater than Result(5), and for all nonnegative |
| integers j less than Result(6), the character at position k+j of |
| Result(1) is the same as the character at position j of Result(2); |
| but if there is no such integer k, then go to step 14. |
| 10. Compute a string value equal to the substring of Result(1), consisting |
| of the characters at positions p through k1, inclusive. |
| 11. Call the [[Put]] method of A with A.length and Result(10) as arguments. |
| 12. Let p be k+Result(6). |
| 13. Go to step 9. |
| 14. Compute a string value equal to the substring of Result(1), consisting |
| of the characters from position p to the end of Result(1). |
| 15. Call the [[Put]] method of A with A.length and Result(14) as arguments. |
| 16. Return A. |
| 17. If p equals Result(5), return A. |
| 18. Compute a string value equal to the substring of Result(1), consisting of |
| the single character at position p. |
| 19. Call the [[Put]] method of A with A.length and Result(18) as arguments. |
| 20. Increase p by 1. |
| 21. Go to step 17. |
| |
| Note that the split function is intentionally generic; it does not require that its this value be a String |
| object. Therefore it can be transferred to other kinds of objects for use as a method. |
| |
| Author: christine@netscape.com |
| Date: 12 november 1997 |
| */ |
| |
| var SECTION = "15.5.4.8-3"; |
| var VERSION = "ECMA_1"; |
| startTest(); |
| var TITLE = "String.prototype.split"; |
| |
| writeHeaderToLog( SECTION + " "+ TITLE); |
| |
| var TEST_STRING = ""; |
| var EXPECT = new Array(); |
| |
| // this.toString is the empty string. |
| |
| new TestCase( SECTION, |
| "var s = new String(); s.split().length", |
| 1, |
| eval("var s = new String(); s.split().length") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(); s.split()[0]", |
| "", |
| eval("var s = new String(); s.split()[0]") ); |
| |
| // this.toString() is the empty string, separator is specified. |
| |
| new TestCase( SECTION, |
| "var s = new String(); s.split('').length", |
| 0, |
| eval("var s = new String(); s.split('').length") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(); s.split(' ').length", |
| 1, |
| eval("var s = new String(); s.split(' ').length") ); |
| |
| // this to string is " " |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split().length", |
| 1, |
| eval("var s = new String(' '); s.split().length") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split()[0]", |
| " ", |
| eval("var s = new String(' '); s.split()[0]") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split('').length", |
| 1, |
| eval("var s = new String(' '); s.split('').length") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split('')[0]", |
| " ", |
| eval("var s = new String(' '); s.split('')[0]") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split(' ').length", |
| 2, |
| eval("var s = new String(' '); s.split(' ').length") ); |
| |
| new TestCase( SECTION, |
| "var s = new String(' '); s.split(' ')[0]", |
| "", |
| eval("var s = new String(' '); s.split(' ')[0]") ); |
| |
| new TestCase( SECTION, |
| "\"\".split(\"\").length", |
| 0, |
| ("".split("")).length ); |
| |
| new TestCase( SECTION, |
| "\"\".split(\"x\").length", |
| 1, |
| ("".split("x")).length ); |
| |
| new TestCase( SECTION, |
| "\"\".split(\"x\")[0]", |
| "", |
| ("".split("x"))[0] ); |
| |
| test(); |
| |
| function Split( string, separator ) { |
| string = String( string ); |
| |
| var A = new Array(); |
| |
| if ( arguments.length < 2 ) { |
| A[0] = string; |
| return A; |
| } |
| |
| separator = String( separator ); |
| |
| var str_len = String( string ).length; |
| var sep_len = String( separator ).length; |
| |
| var p = 0; |
| var k = 0; |
| |
| if ( sep_len == 0 ) { |
| for ( ; p < str_len; p++ ) { |
| A[A.length] = String( string.charAt(p) ); |
| } |
| } |
| return A; |
| } |