array item access? #27

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1. aarondancer commented on May 2, 2019

   

   aarondancer

   on May 2, 2019

   Last edited by aarondancer

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   Dot notation can be used for accessing array items as well:

   const obj = { arr: [32, 23, 1234] };
   dlv(obj, 'arr.1');

   Supporting brackets is pretty straight forward, I'm sure there's a more succinct or performant alternative but here's the gist:

   function dlv(obj, key, def, p) {
   	p = 0;
   	key = key.split ? key.replace(/\[([\w\d]+)\]/g, '.$1').split('.') : key;
   	while (obj && p<key.length) obj = obj[key[p++]];
   	return (obj===undefined || p<key.length) ? def : obj;
   }
   
   const obj = { arr: [32, 23, 1234] };
   dlv(obj, 'arr[1]');

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2. developit commented on May 15, 2019

   

   developit

   on May 15, 2019

   Last edited by developit

   Owner

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   You can already use an array key, which is better than constructing a string for offset-based access:

   dlv(obj, ['arr', 1])

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3. TimBroddin commented on May 23, 2019

   

   TimBroddin

   on May 23, 2019

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   I once tried to solve this problem too: https://github.com/TimBroddin/data-diver/blob/master/src/index.js

   I tested to see if the child was an array or an object, but I'm not sure if that's necessary :)
4. ihtml5 commented on May 23, 2019

   

   ihtml5

   on May 23, 2019 · Hidden as spam

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