Dung Ping said:[color=blue]
>
>Such as:
>
><script>
>//code
>
>aaaa
>
>zzzz
>
>ccc
></script>
>
>Counts will be produced: a=4, z=4, c=3. The is not for web site
>uploading, but just to get statistics for own research. All data will
>be in plain text. Everything will happen in a single computer, no
>Internet, nor ISP.
>
>I believe it is not a difficult job for a programing language, such as
>C. With the MS Word the letters can be counted one type at a time. But
>that is rather slow. Maybe Javascript can do the work so efficiently
>as a fully-fledged programing language. Thanks.[/color]
Sure. Almost like a fully-fledged programming language.
The following isn't very efficient, but it's pretty fast,
and it took under 10 minutes to write and debug.
Save this to your Windows desktop as "count.hta" and
double-click the icon:
<html>
<head>
<title>Letter Frequency</title>
<hta:application id="lcount" applicationname="Letter Frequency">
<script type="text/javascript">
function countFile(pathName) {
var tally=new Object();
var fso=new ActiveXObject("Scripting.FileSystemObject");
var f=fso.OpenTextFile(pathName,1,false); //readonly, do not create
while(!f.AtEndOfStream) {
var c=f.read(1);
tally[c]=(tally[c]|0)+1;
}
f.Close();
var res="<xmp>";
for(var uc=65;uc<91;uc++) {
res+=String.fromCharCode(uc)+": "
+(tally[String.fromCharCode(uc)]|0
+ tally[String.fromCharCode(uc+32)]|0)+"\n";
}
res+="</xmp>";
document.getElementById("results").innerHTML=res;
}
</script>
</head>
<body>
<form>
Choose a file:
<input type="file" name="path" size="60">
<input type="button" value="Count" onclick="countFile(this.form.path.value)">
</form>
<div id="results"></div>
</body>
</html>
