Category talk:Wren-fmt: Difference between revisions

}

// Prints (with a following \n) a sequence 'a' to stdout in columnar form

// with a maximum of 'colSize' elements per column. 'fmt' is applied individually

// to each element and formatted elements are separated by a single space.

static cprint(fmt, a, colSize) {

if (!(fmt is String)) Fiber.abort("First argument must be a string.")

if (!(a is Sequence)) Fiber.abort("Second argument must be a sequence.")

if (!((colSize is Num) && colSize.isInteger && colSize > 0)) {

Fiber.abort("Third argument must be a positive integer.")

}

fmt = fmt + " "

for (i in 0...colSize) {

var j = i

while (j < a.count) {

Fmt.write(fmt, a[j])

j = j + colSize

}

System.print()

}