javascript - Combine associative array/object in JS without erasing numerically indexed values $.extend() -

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when using $.extend(true, {}, obj1, obj2), resulting object erases numerically-indexed data number of results in obj2.

a sample call $.extend() this:

then take sample data instance:

 var base_json_obj = {     'regions': [    'nc',     '-greensboro',     'va',     '-richmond'   ],   'vehicles': [     'ford:escape',     'nissan:altima'   ],   'turnover': {     'min': '0d',     'max': '5d'   }  };   var new_json_obj = {     'regions': [     'fl',     '-miami'   ],   'vehicles': [     'hyundai:sonata'   ],   'turnover': {     'min': '1d',     'max': '6d'   }  };   var resulting_object = $.extend(true, {}, base_json_obj, new_json_obj);

the resulting object 

{   'regions': [     'fl',     '-miami',     'va',     '-richmond'   ],   'vehicles': [     'hyundai:sonata',     'nissan:altima'   ]   'turnover': {     'min': '1d',     'max': '6d'   }, }

and here expected output. notice regions has 6 values , vehicles has 3 values.

{   'regions': [     'nc',     '-greensboro',     'va',     '-richmond',     'fl',     '-miami'   ],   'vehicles': [     'ford:escape',     'nissan:altima',     'hyundai:sonata'   ]   'turnover': {     'min': '1d',     'max': '6d'   }, }

is there way modify call $.extend() or use $.merge() in way achieve this?

$.extend(true, ...) treat arrays object, using value , index, 'min', key of 0 replaced.

you'll need write handles case. $.extend() function relatively complicated, place start:





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