Lesen Sie die Rohdaten aus Textdatei und dann wandeln sie in erwartet json-Format mit jquery

Question

1.Read die Rohdaten von data.txt
dies die Beispieldaten aus Textdatei ist

nike sport shirt 85 20<br> 
nike sneeker 120 15<br> 
nike pants 90 20<br> 
spring field short 50 40<br> 
spring field dress 78 50<br> 
spring field bags 48 10<br> 
adidas boost shoes 65 10<br> 
adidas trainer 48 10<br> 
adidas jacket 140 35<br> 
H&M sweaters 49 15<br> 
H&M swimwear 88 30<br> 
H&M modern classics 200 5<br> 

2.Convert sie in erwartetem json Format

/* expected json format */ 
{ 
    'nike': [ 
     { catagory: 'sport shirt', price: 85, quantity: 20 }, 
     { catagory: 'sneeker', price: 120, quantity: 15 }, 
     { catagory: 'pants', price: 90, quantity: 20 } 
    ], 
    'spring field': [ 
     { catagory: 'short', price: 50, quantity: 40 }, 
     { catagory: 'dress', price: 78, quantity: 50 }, 
     { catagory: 'bag', price: 48, quantity: 10 } 
    ], 
    'adidas': [ 
     { catagory: 'boost shoes', price: 65, quantity: 10 }, 
     { catagory: 'trainer', price: 48, quantity: 20 }, 
     { catagory: 'jacket', price: 140, quantity: 35 } 
    ], 
    'H&M':[ 
     { catagory: 'sweaters', price: 49, quantity: 15 }, 
     { catagory: 'swimwear', price: 88, quantity: 30 }, 
     { catagory: 'modern classics', price: 200, quantity: 5 } 
    ] 
} 

So, wie die Rohdaten aus Textdatei zu lesen und sie dann in ex umwandeln erkannt json Format mit jquery?

Dank

Answer 1

Sie XMLHttpRequest() verwenden können, for Schleife, .shift(), Object.hasOwnProperty(), .split(), .trim(), .forEach()

var obj = {}; 
var items = ["category", "price", "quantity"]; 
var fn = function(curr, tmp, obj, item, items) { 
    curr.forEach(function(el, index) { 
    tmp[items[index]] = el; 
    }) 
    obj[item].push(tmp) 
} 
var request = new XMLHttpRequest(); 
request.open("GET", "data.txt", true); 
request.onload = function() { 
    var arr = this.responseText.split(/<br>/); 
    for (var i = 0; i < arr.length; i++) { 
    var curr = arr[i].trim().split(/\s+/); 
    var item = curr.shift(); 
    var tmp = {}; 
    if (item) { 
     if (!obj.hasOwnProperty(item)) { 
     obj[item] = []; 
     } 
     fn(curr, tmp, obj, item, items) 
    } 
    } 
    console.log(obj) 
} 
request.send(); 

plnkr http://plnkr.co/edit/xAYaoll9FVjEUqSXaslT?p=preview