mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 12:15:51 +00:00
19 lines
524 B
JavaScript
19 lines
524 B
JavaScript
// unique.js: read the contents of a file and print out the unique lines
|
|
|
|
defineClass("File")
|
|
|
|
// "arguments[0]" refers to the first argument at the command line to the
|
|
// script, if present. If not present, "arguments[0]" will be undefined,
|
|
// which will cause f to read from System.in.
|
|
var f = new File(arguments[0]);
|
|
var o = {}
|
|
var line;
|
|
while ((line = f.readLine()) != null) {
|
|
// Use JavaScript objects' inherent nature as an associative
|
|
// array to provide uniqueness
|
|
o[line] = true;
|
|
}
|
|
for (i in o) {
|
|
print(i);
|
|
}
|