📝 update test file & add new test file word_collector.nas

test/word_collector.nas

@@ -0,0 +1,47 @@
+import.stl.sort;
+var argv=runtime.argv();
+
+if(size(argv)<1){
+    println("no input files.");
+    exit(-1);
+}
+
+var all_exists=1;
+foreach(var f;argv){
+    if(!io.exists(f)){
+        println("cannot open file <",f,">");
+        all_exists=0;
+    }
+}
+
+if(!all_exists){
+    exit(-1);;
+}
+
+var to_lower=func(c){
+    if('a'[0]<=c[0] and c[0]<='z'[0])
+        return c;
+    elsif('A'[0]<=c[0] and c[0]<='Z'[0])
+        return chr(c[0]-'A'[0]+'a'[0]);
+}
+
+var file_content="";
+foreach(var f;argv)
+    file_content~=io.fin(f)~" ";
+var token={};
+var len=size(file_content);
+var s="";
+for(var i=0;i<len;i+=1){
+    var n=file_content[i];
+    var c=chr(n);
+    if(('a'[0]<=n and n<='z'[0]) or ('A'[0]<=n and n<='Z'[0]) or c=='\''[0] or c=='-'[0]){
+        s~=to_lower(c);
+    }elsif(size(s)){
+        token[s]+=1;
+        s="";
+    }
+}
+
+var vec=keys(token);
+sort(vec,0,size(vec)-1,func(a,b){return cmp(a,b)<=0;});
+println(vec);