Add modulo (%) infix operator

[fananek]

Description

Modulo (%) operation is not supported at the moment. It can be used e.g. for calculation even/odd rows. Zebra striped tables or grids are pretty common design requirement.

example psudo-code:

#for(row in rows)
  #if(index % 2 == 0):
    // use row backgroud color
  #else:
    // use row alternate backgroud color
  #endif
#endfor

Solution

Implement function which handles modulo operation for Int as well as Double input values. Already working on pull-request.

[grundoon]

(@fananek just a pointer to how I implemented it for Leaf 1.x https://github.com/vapor/template-kit/pull/19)

[fananek]

@grundoon Thanks, but it's not relevant anymore. Leaf has been completely rebuilt. I have it almost ready for Leaf 4. Just making few more tests.

[0xTim]

Closed via #88