jquery - remove and replace item from object in array javascript -


i have read , tried of posts of on subject, reason none of answers providing desired effect.

i have written shopping basket program , once user clicks the'buy now' button wish make post request containing object users order.

problem

the user has option purchase 3 different items. each time user clicks on item, html input box, increase amount wish purchase want update object contain latest amount chosen.

in simplest format basket, when initiated, looks :

 var basket = {items:[                     {item:"trousers", quantity:1, cost:"10"},                     {item:"trainers", quantity:1, cost:"5"},                     {item:"jacket", quantity:1, cost:"30"}                 ]}

each time user clicks input button wish basket updated if user clicked increase jacket quantity of 3, , trousers 4 want object this:

 var basket = {items:[                         {item:"trousers", quantity:4, cost:"40"},                         {item:"trainers", quantity:1, cost:"5"},                         {item:"jacket", quantity:3, cost:"90"}                     ]}

then if user decides reduce number of trousers 1, 3, want basket.items object this:

 var basket = {items:[                             {item:"trousers", quantity:3, cost:"30"},                             {item:"trainers", quantity:1, cost:"5"},                             {item:"jacket", quantity:3, cost:"90"}                         ]}

i have written code calculations etc. not issue issue update basket.items contain 3 items listed above @ once, latest data.

i cannot use filter method needs work in older versions of ie. have tried solutions listed in this , this along many more none of these answers providing solution looking for.

let me know if further information required.

try this:

var basket = {     items: [      {         item: "trousers",         quantity: 1,         cost: "10"     }, {         item: "trainers",         quantity: 1,         cost: "5"     }, {         item: "jacket",         quantity: 1,         cost: "30"     }] };  function updatebasket(item) {     basket.items = basket.items.map(function (product) {         if (product.item == item.item) return item;         else return product;     }); }  updatebasket({     item: "jacket",     quantity: 9,     cost: "30" }); updatebasket({     item: "trainers",     quantity: 9,     cost: "30" }); console.log(basket)

Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more