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54 lines
2.0 KiB
JavaScript
54 lines
2.0 KiB
JavaScript
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Rhino code, released
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* May 6, 1999.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1997-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Norris Boyd
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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// unique.js: read the contents of a file and print out the unique lines
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defineClass("File")
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// "arguments[0]" refers to the first argument at the command line to the
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// script, if present. If not present, "arguments[0]" will be undefined,
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// which will cause f to read from System.in.
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var f = new File(arguments[0]);
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var o = {}
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var line;
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while ((line = f.readLine()) != null) {
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// Use JavaScript objects' inherent nature as an associative
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// array to provide uniqueness
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o[line] = true;
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}
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for (i in o) {
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print(i);
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}
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