How to search for a specific string in List of string array

Question

How to search for a specific string in List of string array if I have List like this:

adjustmentJSON.columns = new List<string[]>
{
    new[] {"A|green"}, new[] {"B|green"}, new[] {"A|green"},
    new[] {"DD|green"}, new[] {"|green"}, new[] {"|green"}, new[] {"NN|red"}
};

var skipValue = 0;
var TOTALDYNAMICSECTIONS = 5;

var categorizationByBenefitHeader = adjustmentJSON.columns
    .Skip(skipValue)
    .Take(TOTALDYNAMICSECTIONS)
    .Where(b => adjustmentJSON.columns.Contains(new[] { "green" }))
    .ToList();

I want to get:

["A|green","B|green","A|green","DD|green","|green"]

What is the type of input data? What does If skipValue = 0,TOTALDYNAMICSECTIONS =4 mean? — Pavel Anikhouski
– Pavel Anikhouski, Commented Jun 9, 2020 at 20:03
@PavelAnikhouski I mean I have a list of arrays of strings, so I loop, searching the first 5 items, then the second 5 items and so on because some business logic — Anyname Donotcare
– Anyname Donotcare, Commented Jun 9, 2020 at 20:05
Do you really want to Skip and Take before you filter the results? — littlerufe
– littlerufe, Commented Jun 9, 2020 at 20:20
Ok, just checking. So the results may be fewer than TOTALDYNAMICSECTIONS — littlerufe
– littlerufe, Commented Jun 9, 2020 at 20:26

Guru Stron · Accepted Answer · 2020-06-09 20:14:52Z

3

You can use SelectMany to flatten the nested collections:

var categorizationByBenefitHeader = adjustmentJSON.columns
     .SelectMany(arr => arr)
     .Where(s => s.Contains("green"))
     .Skip(skipValue)
     .Take(TOTALDYNAMICSECTIONS)
     .ToList();

answered Jun 9, 2020 at 20:14

Guru Stron

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