javascript - Issue with merging and reordering two arrays of objects -


i'm trying figure out how merge 2 arrays of objects. here's need do:

  • field property unique identifier of each object
  • output needs have objects listed in originalarray, including objects in originalarray not exist in localstoragearray
  • order of localstoragearray needs maintained, attention paid previous requirement (order should be: bar, bee, foo, baz)
  • output needs contain following property values localstoragearray: hidden , width (field give-in, since identifier)
  • all other properties of originalarray need maintained in output

here's wack @ it:

var outputarray = [];  localstoragearray.foreach(function(localitem){     originalarray.foreach(function(originalitem){         if(originalitem.field === localitem.field){             var item = json.parse(json.stringify(originalitem));             item.hidden = localitem.hidden;             item.width = localitem.width;             outputarray.push(item);         }     }); });

full js fiddle

i able ordering correct , properties right, 1 issue i'm having when object exists in originalarray doesn't exist in localstoragearray, object not included in outputarray.

any suggestions solution?

here arrays:

var originalarray = [     {field: "foo", hidden: true, sortable: false, template: "<div>#=text#</div>", width: "20px", propa: "a", propb: "b"},     {field: "bee", hidden: true, sortable: false, template: "=#text#", int: 4},     {field: "bar", hidden: false, sortable: false, template: "", width: "20%", propc: "c"},     {field: "baz", hidden: false, sortable: true, template: "<span>#=text#</span>", int: 3} ];  var localstoragearray = [     {field: "bar", hidden: false, sortable: false, width: "100px"},     {field: "foo", hidden: true, sortable: false, template: "<div>#=text#</div>", width: "40px"},     {field: "boo", hidden: true, sortable: true, template: "<div>boo: #=text#</div>", width: "200px"},     {field: "baz", hidden: true, template: "baz:#=text#", width: "20px"} ];

and here desired output:

var desiredarray =  [    {field: "bar", hidden: false, sortable: false, template: "", width: "100px", propc: "c"},    {field: "bee", hidden: true, sortable: false, template: "=#text#", int: 4},    {field: "foo", hidden: true, sortable: false, template: "<div>#=text#</div>", width: "40px", propa: "a", propb: "b"},    {field: "baz", hidden: true, sortable: true, template: "<span>#=text#</span>", width: "20px", int: 3} ]

if understand correctly, want overwrite hidden , width properties of objects in originalarray present in localstoragearray (2 objects considered same if field property same)

    (function () {     var fieldarray = localstoragearray.map(function(e) { return e.field; });     originalarray.foreach(function(originalitem) {       var index = fieldarray.indexof(originalitem.field);       var localitem;        if(index !== -1) {         //it's in localstorage, overwrite          localitem = localstoragearray[index];         originalitem.hidden = localitem.hidden || originalitem.hidden;         originalitem.width = localitem.width || originalitem.width;         outputarray.push(originalitem);       }     })();

instead of creating additional array, can loop through localstoragearray , compare field property


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