How to address dynamic object keys [duplicate]

Question

I need to access object properties with dynamic keys which has persistent structure but different keys, like on one occasion it could be:

 var ty_tabs=[{ "key1" :[{ "d1" : "v1", "d2" : "v2", "d3" : "v3" }], "key2" :[{ "d1" : "v1", "d2" : "v2", "d3" : "v3" }] }]

and on another one:

 var ty_tabs=[{ "key3" :[{ "d1" : "v1", "d2" : "v2", "d3" : "v3" }], "key4" :[{ "d1" : "v1", "d2" : "v2", "d3" : "v3" }] }]

How do I adopt my code:

var b,a,d1,d2,d3; for (b = 0 , a = ty_tabs.length; b < a ; ++b){ d1 = ty_tabs[b].key1[0].d1; d2 = ty_tabs[b].key1[0].d2; d3 = ty_tabs[b].key1[0].d3; }

To access properties with varying keys:

 d1 = ty_tabs[b].?[0].d1; d2 = ty_tabs[b].?[0].d2; d3 = ty_tabs[b].?[0].d3;

I have in JSON data ,array value as object as name array; this name array is dynamic value and this value have dynamic value. — neda zamani
– neda zamani, Commented Feb 13, 2014 at 8:57

Sirko · Accepted Answer · 2014-02-13 08:50:46Z

If you don't know about the keys of an object, but need all keys present within an it, you can use Object.keys():

var b,a,d1,d2,d3, i, keys; for (b = 0 , a = ty_tabs.length; b < a ; ++b){ keys = Object.keys( ty_tabs[b] ); for( i=0; i<keys.length; i++ ) { d1 = ty_tabs[b][ keys[i] ][0].d1; d2 = ty_tabs[b][ keys[i] ][0].d2; d3 = ty_tabs[b][ keys[i] ][0].d3; } }

^{Object.keys() is rather well supported. For older versions of IE, you can use the polyfill provided at MDN}

Collectives™ on Stack Overflow

How to address dynamic object keys [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related