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c#arraysmathmatrixjagged-arrays
Fizban
Fizban

Reputation: 661

How to invert the values of a logical jagged array in c#?

Good afternoon, I have a c# jagged array with true and false values (or 0's and 1's) and I want to reverse the values like:

1 1 1 1
0 1 1 0
1 1 1 1
1 0 0 1

to became:

0 0 0 0
1 0 0 1
0 0 0 0
0 1 1 0

Is there an easy way to do it not looping it? something like !myJaggedArray??

Upvotes: 6

Views: 634

Answers (2)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 727067

There is no built-in operation for inverting an array like that, but you can use LINQ to do the inversion without explicit loops:

var res = myJaggedArray.Select(a => a.Select(n => 1-n).ToArray()).ToArray();

The 1-n trick is a common way of replacing zeros with ones and ones with zeros without using conditional execution.

Upvotes: 12

Ulugbek Umirov
Ulugbek Umirov

Reputation: 12807

There is no built-in function, but you can use LINQ.

int[][] input = new[]
{
  new[] { 1, 1, 1, 1 },
  new[] { 0, 1, 1, 0 },
  new[] { 1, 1, 1, 1 },
  new[] { 1, 0, 0, 1 }
};
int[][] output = input.Select(row => row.Select(value => value == 1 ? 0 : 1).ToArray()).ToArray();

For logical values:

bool[][] input = new[]
{
  new[] { true,  true,  true,  true },
  new[] { false, true,  true,  false },
  new[] { true,  true,  true,  true },
  new[] { true,  false, false, true }
};
bool[][] output = input.Select(row => row.Select(value => !value).ToArray()).ToArray();

Upvotes: 8

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