padLeft method

String padLeft(
  1. int width, [
  2. String padding = ' '
])

Pads the string on the left to the specified width.

Example:

'5'.padLeft(3, '0'); // '005'

Implementation

String padLeft(int width, [String padding = ' ']) {
  assert(width >= 0, 'width must be non-negative');
  return length >= width ? this : padding * (width - length) + this;
}