How to load a table file in JavaScript synchronously

Question

How to load a table file in JavaScript synchronously

I came across this particular method for accessing a local text file.

However, I am facing an issue as I do not want the file to be read asynchronously. My goal is to have the function read the file and return the output as a string variable instead.

The format of my file is as follows:

time    acceleration    velocity    position
0   0   0   0
0.1 0.7584280404    0.075842804 0.0075842804
0.2 0.1291023633    0.0887530404    0.0164595844
0.3 0.4040327317    0.1291563135    0.0293752158
0.4 0.8891570587    0.2180720194    0.0511824177
0.5 0.3481323377    0.2528852532    0.0764709431
0.6 0.8920292137    0.3420881745    0.1106797605
0.7 0.7375283292    0.4158410075    0.1522638613
0.8 0.2647998196    0.4423209894    0.1964959602
0.9 0.633358462 0.5056568356    0.2470616438
1   0.3901214569    0.5446689813    0.3015285419
1.1 0.4712272086    0.5917917022    0.3607077121
1.2 0.693854515 0.6611771537    0.4268254275
1.3 0.4248616176    0.7036633154    0.497191759

The extracted data will be stored in obj with the following fields:

obj.time
obj.acceleration
obj.velocity
obj.position

These values need to be retrieved from the first row of the text file. All operations are conducted locally, so the loading time of heavy js libraries is not a concern. If anyone knows of a shortcut that meets my requirements, please share it. Alternatively, if there is no existing library, guidance on how to read a file synchronously would also be appreciated.

javascript ajax asynchronous xmlhttprequest

Answer 1

Answer №1

To retrieve the contents of a file and parse the data on your own, you can utilize a get request. By using the jQuery get method (or any other library or even making XMLHttpRequests manually), you can achieve this:

 $.ajax({
     url: 'http://domain.com/path/to/your/file.txt',
     async: true
   }).
   success(function (data) {
     var parsedData = parseMyFormat(data);
     console.log(parsedData[0].position);
   });

 function parseMyFormat (data) {
   var parsed = [];
   // Split the data by new line and iterate through each line
     var item = {};
     // Split each line by tab (\t) and assign values to respective properties
        item.time = col[0];
        item.acceleration = col[1];
        item.velocity = col[2];
        item.position = col[3];
     parsed.push(item);
 }

Answer 2

To retrieve the contents of a file and parse the data on your own, you can utilize a get request. By using the jQuery get method (or any other library or even making XMLHttpRequests manually), you can achieve this:

 $.ajax({
     url: 'http://domain.com/path/to/your/file.txt',
     async: true
   }).
   success(function (data) {
     var parsedData = parseMyFormat(data);
     console.log(parsedData[0].position);
   });

 function parseMyFormat (data) {
   var parsed = [];
   // Split the data by new line and iterate through each line
     var item = {};
     // Split each line by tab (\t) and assign values to respective properties
        item.time = col[0];
        item.acceleration = col[1];
        item.velocity = col[2];
        item.position = col[3];
     parsed.push(item);
 }

How to load a table file in JavaScript synchronously

Answer №1

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