Sha256: 8dd811d645169f1638908ca7a70503714660c91160c29e24d3c228c4a68fd1a7
Contents?: true
Size: 856 Bytes
Versions: 6
Compression:
Stored size: 856 Bytes
Contents
class String
# Expands tabs to +n+ spaces. Non-destructive. If +n+ is 0,
# then tabs are simply removed. Raises an exception if +n+
# is negative.
#
# "\t\tHey".expand_tab(2) #=> " Hey"
#
# Thanks to GGaramuno for a more efficient algorithm. Very nice.
#
# CREDIT: Gavin Sinclair, Noah Gibbs, GGaramuno
def expand_tab(n=8)
n = n.to_int
raise ArgumentError, "n must be >= 0" if n < 0
return gsub(/\t/, "") if n == 0
return gsub(/\t/, " ") if n == 1
str = self.dup
while
str.gsub!(/^([^\t\n]*)(\t+)/) { |f|
val = ( n * $2.size - ($1.size % n) )
$1 << (' ' * val)
}
end
str
end
# Pluralized form of #expand_tab.
alias_method :expand_tabs, :expand_tab
# NOTE: Don't much care for the name String#expand_tab.
# What about a more concise name like #detab?
end
Version data entries
6 entries across 6 versions & 1 rubygems