Building object using javascript instead of php

Question

I’m trying to create a data object in javascript that matches the construction from the php script below and need help with adding the ‘depends’ elements under object ‘name’.

var data = [{}];
var json = [
{ "type": "type1", "group": "group1", "name": "name1", "depends": ["x","y","z"] },
{ "type": "type2", "group": "group2", "name": "name2", "depends": ["a","b","c"] },
{ "type": "type3", "group": "group3", "name": "name3", "depends": ["q"] }]

json.forEach(function (item) {
    data.push(item.name);
});


json.forEach(function (item) {
    item.forEach(function (item.depends) {
        data.push(item.depends);
    });
});

PHP

foreach ($json as $obj) {
    $data[$obj['name']] = $obj;
}

foreach ($data as &$obj) {
    $obj['dependedOnBy'] = array();
}

unset($obj);
foreach ($data as &$obj) {
    foreach ($obj['depends'] as $name) {
        if ($data[$name]) {
            $data[$name]['dependedOnBy'][] = $obj['name'];
        } else {
            $errors[] = "Unrecognized dependency: '$obj[name]' depends on '$name'";
        }
    }
 }

function (item.depends) {?. That's not even valid syntax... — elclanrs
– elclanrs, Commented Aug 15, 2014 at 7:11

georg · Accepted Answer · 2014-08-15 10:05:45Z

1

From my understanding, this is what your php code does:

var data = {};
json.forEach(function (item) {
    item.dependedOnBy = [];
    data[item.name] = item;
});

var errors = [];
Object.keys(data).forEach(function (name) {
    data[name].depends.forEach(function (dep) {
        if(!data[dep])
            errors.push( "Unrecognized dependency: " + name + " depends on " + dep);
        else
            data[name].dependedOnBy.push(data[dep]);
    });
});

http://jsfiddle.net/yqqdr5bt/

edited Aug 15, 2014 at 10:05

answered Aug 15, 2014 at 8:01

georg

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6 Comments

EaterOfCode Over a year ago

So I'm not the only one using Object.keys(data).forEach(), nice!

user3359706 Over a year ago

Fantastic. I'm still on a steep learning curve! Any ideas why the output doesn't quite match the structure from the php code with json below? javascript object {name1: Object, name2: Object, x: Object, y:Object, a: Object...} php Object {data: Object, errors: Array[0]}

georg Over a year ago

@user3359706: the output doesn't match your example, could you edit the post and add some real data? Also, try console.log(JSON.stringify(data)) instead of just console.log.

user3359706 Over a year ago

Sorry I should have included this: var json = [ { "type": "type1", "group": "group1", "name": "name1", "depends": ["x","y"] }, { "type": "type2", "group": "group2", "name": "name2", "depends": ["a","b"] }, { "type": "type3", "group": "group3", "name": "x", "depends": [] }, { "type": "type3", "group": "group3", "name": "y", "depends": [] }, { "type": "type3", "group": "group3", "name": "a", "depends": [] }, { "type": "type3", "group": "group3", "name": "b", "depends": [] } ] And I missed this. echo json_encode(array( 'data' => $data, 'errors' => $errors

georg Over a year ago

@user3359706: see the fiddle.

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