func:addCol

addCol(grid, col, fn)

Add a column to a grid by mapping each row to a new cell value. The col parameter may be a simple String name or may be a dictionary which must have a "name" tag (any other tags become column meta-data). The mapping function takes (row) and returns the new cell values for the column.

Examples:

// add new column named areaMeter
readAll(site).addCol("areaMeters") s => s->area.to(1m²)

// add new column named areaMeter with dis meta
readAll(site).addCol({name:"areaMeters", dis:"Area Meters"}) s => s->area.to(1m²)