Question

75

node console.log / util.inspect for nested Object / Array

rated 0 times [ 82] [ 7] / answers: 1 / hits: 6963 / 11 Years ago, mon, february 3, 2014, 12:00:00

For the nested Object or Array

var obj = {

  foo:

  {

    foo:

    {

      foo:

      {

        foo:

        {

          foo:

          {

            foo: 'foo'

          }

        }

      }

    }

  }

};

console.log(obj);

util.debug(obj);

util.debug(util.inspect(obj));

The console.log or util.debug + util.inspect

{ foo: { foo: { foo: [Object] } } }

DEBUG: [object Object]

DEBUG: { foo: { foo: { foo: [Object] } } }

Under a certain depth, it shows just [Object] with no further detail.

This is always annoying on debugging since I can't investigate the actual value.

Why does node (or V8) implements like this? and Is there any work-around?

Thanks.

EDIT:
I received a suggestion

console.log(JSON.stringify(obj));

The result

{foo:{foo:{foo:{foo:{foo:{foo:foo}}}}}}

It sort of works, but obviously the whole is stringifyed, and probably I couldn't do this for all object output on debugging. Not generic method.

EDIT2:

solution:

console.log(util.inspect(obj,{ depth: null }));

output:

{ foo: { foo: { foo: { foo: { foo: { foo: 'foo' } } } } } }

cool. This is what I want!

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lailab

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4 Years ago

answered 11 Years ago darrylm · Accepted Answer

util.inspect() takes a second options argument, where you can specify depth. The default is 2.

http://nodejs.org/api/util.html#util_util_inspect_object_options

So:

util = require('util');

var obj = { foo: { foo: { foo: { foo: { foo: { foo: 'foo' } } } } } };

console.log(util.inspect(obj, {depth:12}));

... yields:

{ foo: { foo: { foo: { foo: { foo: { foo: 'foo' } } } } } }