node console.log() output array in one line

Question

I use node v10.6.0.

Here's my codes:

console.log([{a:1, b:2}, {a:1, b:2}, {a:1, b:2}])
console.log([{a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}, {a:1, b:2}])

the output is as following:

[ { a: 1, b: 2 }, { a: 1, b: 2 }, { a: 1, b: 2 } ]
[ { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 },
  { a: 1, b: 2 } ]

How can I make the second array output in one line, instead of spreading to multiple lines.

@user202729, thanks for your remind. JSON.stringify solved my problem nicely! — mCY
– mCY, Commented Jul 28, 2018 at 16:14
util.inspect seems a little weird. As util.inspect(...a long array...) will output '[ { a: 1, b: 2 },\n { a: 1, b: 2 },\n { a: 1, b: 2 },\n .... Why include \n ... — mCY
– mCY, Commented Jul 28, 2018 at 16:16
@mCY There are parameters to control the output format for util.inspect. (read the documentation) — user202729
– user202729, Commented Jul 28, 2018 at 16:18

user202729 · Accepted Answer · 2018-07-28 16:19:52Z

16

Although the output is not exactly the same as if console.log is used, it's possible to use JSON.stringify to convert the array to a string, then print it:

console.log(JSON.stringify(array))

Try it online!

It cannot process circular structures, however.

answered Jul 28, 2018 at 16:19

user202729

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Comments

NoDataFound · Accepted Answer · 2022-02-19 22:09:10Z

8

Why not using console.table instead?

This give this nice table: https://tio.run/##y0osSyxOLsosKNHNy09J/Z9YVJRYaRtdnWhlqKOQZGVUq6NAW3bs/@T8vOL8nFS9ksSknFQNsAM0//8HAA

┌─────────┬───┬───┐
│ (index) │ a │ b │
├─────────┼───┼───┤
│    0    │ 1 │ 2 │
│    1    │ 1 │ 2 │
│    2    │ 1 │ 2 │
│    3    │ 1 │ 2 │
│    4    │ 1 │ 2 │
│    5    │ 1 │ 2 │
│    6    │ 1 │ 2 │
│    7    │ 1 │ 2 │
│    8    │ 1 │ 2 │
└─────────┴───┴───┘

answered Feb 19, 2022 at 22:09

NoDataFound

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Comments

ericfossas · Accepted Answer · 2022-02-19 21:48:48Z

7

I suggest using the following:

console.log(util.inspect(array, {breakLength: Infinity}))

Plus, util.inspect has a bunch of extra options to format and limit the output:

https://nodejs.org/api/util.html#utilinspectobject-options

edited Feb 19, 2022 at 21:48

answered Jun 7, 2020 at 1:35

ericfossas

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3 Comments

Boiethios Over a year ago

There is another option color: true to keep the colors.

agiopnl Over a year ago

I get this: C:\abc.js:91 util.inspect(found, {breakLength: Infinity} ) ^ ReferenceError: util is not defined at Object.<anonymous> (C:\abc.js:91:2) at Module._compile (node:internal/modules/cjs/loader:1101:14) at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10) at Module.load (node:internal/modules/cjs/loader:981:32) at Function.Module._load (node:internal/modules/cjs/loader:822:12) at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12) at node:internal/main/run_main_module:17:47 [Finished in 0.1s]

Oscar Acevedo Over a year ago

@agiopnl you need to import it ==> const util = require('util');

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