scanf(str) public

Scans the current string until the match is exhausted, yielding each match as it is encountered in the string. A block is not necessary though, as the results will simply be aggregated into the final array.

"123 456".block_scanf("%d")
# => [123, 456]

If a block is given, the value from that is returned from the yield is added to an output array.

"123 456".block_scanf("%d") do |digit,| # the ',' unpacks the Array
  digit + 100
# => [223, 556]

See Scanf for details on creating a format string.

You will need to require ‘scanf’ to use IO#scanf.

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