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Word Count
This program is the D version of the classic wc (wordcount) C program. It serves to demonstrate how to read files, slice arrays, and simple symbol table management with associative arrays.
import std.stdio; import std.algorithm; int main(string[] args) { ulong wordCount; ulong lineCount; ulong charCount; int[string] dictionary; writeln(" lines words bytes file"); foreach(arg; args[1 .. args.length]) { ulong lWordCount; ulong lCharCount; ulong lLineCount; auto file = File(arg); foreach(line; file.byLine(KeepTerminator.yes)) { lCharCount += line.length; foreach(word; splitter(line)) { lWordCount += 1; if(auto count = word in dictionary) *count += 1; else dictionary[word.idup] = 1; } lLineCount += 1; } writefln("%8s%8s%8s %s\n", lLineCount, lWordCount, lCharCount, arg); wordCount += lWordCount; lineCount += lLineCount; charCount += lCharCount; } if (args.length > 2) { writefln("--------------------------------------\n%8s%8s%8s total", lineCount, wordCount, charCount); } writeln("--------------------------------------"); foreach (word; sort(dictionary.keys)) { writefln("%3s %s", dictionary[word], word); } return 0; }
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