jlaskey@3: /*
jlaskey@7:  * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
jlaskey@3:  * 
jlaskey@3:  * Redistribution and use in source and binary forms, with or without
jlaskey@3:  * modification, are permitted provided that the following conditions
jlaskey@3:  * are met:
jlaskey@3:  * 
jlaskey@3:  *   - Redistributions of source code must retain the above copyright
jlaskey@3:  *     notice, this list of conditions and the following disclaimer.
jlaskey@3:  * 
jlaskey@3:  *   - Redistributions in binary form must reproduce the above copyright
jlaskey@3:  *     notice, this list of conditions and the following disclaimer in the
jlaskey@3:  *     documentation and/or other materials provided with the distribution.
jlaskey@3:  * 
jlaskey@3:  *   - Neither the name of Oracle nor the names of its
jlaskey@3:  *     contributors may be used to endorse or promote products derived
jlaskey@3:  *     from this software without specific prior written permission.
jlaskey@3:  * 
jlaskey@3:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
jlaskey@3:  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
jlaskey@3:  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
jlaskey@3:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
jlaskey@3:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
jlaskey@3:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
jlaskey@3:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
jlaskey@3:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
jlaskey@3:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
jlaskey@3:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
jlaskey@3:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: /**
jlaskey@3:  * Prints unique lines from a given file.
jlaskey@3:  */
jlaskey@3: 
jlaskey@3: if (arguments.length != 1) {
jlaskey@3:     print("Usage: jjs uniq.js -- <file>");
jlaskey@3:     java.lang.System.exit(1);
jlaskey@3: }
jlaskey@3: 
jlaskey@3: var imports = new JavaImporter(java.io);
jlaskey@3: 
jlaskey@3: var uniqueLines = {};
jlaskey@3: with (imports) {
jlaskey@3:     var reader = new BufferedReader(new FileReader(arguments[0]));
jlaskey@3:     while ((line = reader.readLine()) != null) {
jlaskey@3:         // using a JS object as a map...
jlaskey@3:         uniqueLines[line] = true;
jlaskey@3:     }
jlaskey@3: }
jlaskey@3: 
jlaskey@3: // now print the collected lines
jlaskey@3: for (i in uniqueLines) {
jlaskey@3:     print(i);
jlaskey@3: }