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JavaScript

Raymond Osier
Raymond Osier
16,581 Points
Posted by Raymond Osier
Raymond Osier
16,581 Points

How to read and sort a text file with JavaScript

I am working on a project and I am a little stuck on the best way to solve this problem.

I need to build an application that will import into memory a text file with tabbed delimiters of collected data then I need to search threw the file for specific data once that data is found I need to place it into Either ( array, object, or database) a container that i can easily call for a calculation functions. than display the results to the screen and offer option to export to excel format. I originally planned to do this in c# witch is my first language but i am running into trouble sorting threw the data in c# as well , I want to see witch language will be better suited for this task.

1 Answer

Jacob Mishkin
Jacob Mishkin
23,117 Points
Jacob Mishkin
Jacob Mishkin
23,117 Points

From what you've wrote, it sounds like you need AJAX and JASON. Are you pulling data from another source?

Raymond Osier
Raymond Osier
16,581 Points
Raymond Osier
Raymond Osier
16,581 Points

no i am only pulling data from a local text file ( note this app will be bundled for desktop delpoyment ) . I am currently using the File API here is the start of my code.

if (window.File && window.FileReader && window.FileList && window.Blob){
    console.log('API IS A Go !!');
} else { 
   alert('API Is a NO GO!!');
}
//standard way to select a file in JavaScript
var files = evt.target.files;
function OpenFile(evt){
     // file list object
    // files is a  Fileset of file objects. list some properties
    var output =[];
    for (var i =0, f; f= files[i]; i++){
        output.push('<li><strong>', escape(f.name),'</strong> (' f.type || 'n/a'.')-',f.size,'bytes, last modified: ', f.lastModifiedDate ?f.lastModifiedDate.toLocaleDateString() : 'n/a','</li>');
    }
    document.getElementById('list').innerHTML = '<ul>' + output.join('') + '</ul>';
}
document.getElementById('files').addEventListener('change' , handleFileSelect,false);



function SortFile(){
    fs.root.getFile(files,{},function(fileEntry)){
                        fileEntry.file(function(file){
        var reader = new FileReader();
        reader.onloadend = function(e){
            var txtArea = document.createElement('textarea');
            txtArea.value = this.result;
            document.body.appendChild(txtArea);
        };
        reader.readAsText(file);
    }, errorHandler);

}, errorHandler);

  }

window.requestFileSystem(window.TEMPORARY,1024*1024,onInitFs,errorHandler);