How to convert string of Array of Arrays into a Javascript array of arrays?

Question

I get a string from an end point, the string will be in any of the forms as shown below

Input:

First Form

Option1[opt1,opt4,opt8,opt7],Option5[opt2,opt3],Option6[opt5,opt6]

Expected output:

[ 
  Option1[opt1,opt4,opt8,opt7],
  Option5[opt2,opt3], 
  Option6[opt5,opt6]
]

or

Option1[1,4,8,7],Option5[2,3],Option6[5,6]

Expected output:

[ 
  Option1[1,4,8,7],
  Option5[2,3], 
  Option6[5,6]
]

Second Form

Option1[opt1],Option5[opt2],Option6[opt6]

Expected output:

[ 
  Option1[opt1],
  Option5[opt2], 
  Option6[opt5]
]

or

Option1[1],Option5[2],Option6[6]

Expected output:

[ 
  Option1[1],
  Option5[2], 
  Option6[5]
]

Third Form

Option1,Option5,Option6 or Item1,Item2,Item3 or abc1,xyz2,ccc3

Expected output

[ 
  Option1,
  Option5, 
  Option6
]

for the Second and Third forms

.split(',')

works and returns expected array but here i am facing challenge with First form, looking for some options (reg exp) that can consider , after ].

Note: Sorry for making changes in the question as i see input coming from endpoint is changing, but now i will not make any more edits for the inputs in the question

Your "expected output", aside from not being valid JS, doesn't seem to cover the third input format. — nnnnnn
– nnnnnn, Commented Mar 28, 2017 at 4:22

guest271314 · Accepted Answer · 2017-03-28 04:08:13Z

2

Split comma "," followed by upper case "O"

str.split(/,(?=O)/)

answered Mar 28, 2017 at 4:08

guest271314

1

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9 Comments

Sri Over a year ago

Thanks @guest271314 that worked if string contains Optionsxx what if it has different value like my updated question for Third form Option1,Option5,Option6 or Item1,Item2,Item3 or abc1,xyz2,ccc3

guest271314 Over a year ago

@Sri If letter character begins matching pattern you can use RegExp /,(?=[a-z])/i to match comma , followed by a-z case insensitive

var str = "Option1[1,4,8,7],Option5[2,3],Option6[5,6],abc1,xyz2,ccc3,Item1,Item2,Item3"; var res = str.split(/,(?=[a-z])/i); console.log(res);

Sri Over a year ago

I just noticed that the input is having another form which has strings with in the array i.e Option1[opt1,opt4,opt8,opt7],Option5[opt2,opt3],Option6[opt5,opt6] in that case it is almost behaving like .split(',')

guest271314 Over a year ago

You have now changed requirement twice. See stackoverflow.com/help/how-to-ask

Sri Over a year ago

i mean if the given string is Option1[opt1,opt4,opt8,opt7],Option5[opt2,opt3],Option6[opt5‌,opt6] i am getting the output as ["Option1[opt1","opt4","opt8","opt7]","Option5[opt2","opt3]","Option6[opt5‌","opt6]"] for your suggested answer. The length of the result array is supposed to be 3 but it is 8

|

Ngoan Tran · Accepted Answer · 2017-03-28 06:28:15Z

0

Try with below, using regex:

var check1 = 'Option1[1,4,8,7],Option5[2,3],Option6[5,6]';
var check2 = 'Option1[1],Option5[2],Option6[6]';
var check3 = 'Item1,Item2,Item3';

var regex = /\s*,\s*(?![^\[\]]*\])/g;

var arr1 = check1.split(regex);
var arr2 = check2.split(regex);
var arr3 = check3.split(regex);

console.log(arr1);
console.log(arr2);
console.log(arr3);

answered Mar 28, 2017 at 6:28

Ngoan Tran

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