Align columns: Difference between revisions
Content added Content deleted
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=={{header|Ruby}}==
<lang ruby>
textinfile = <<END▼
Given$a$text$file$of$many$lines,$where$fields$within$a$line$▼
are$delineated$by$a$single$'dollar'$character,$write$a$program▼
that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$▼
column$are$separated$by$at$least$one$space.▼
Further,$allow$for$each$word$in$a$column$to$be$either$left$▼
justified,$right$justified,$or$center$justified$within$its$column.▼
END▼
▲ 'R' => String.instance_method(:rjust),
▲ 'C' => String.instance_method(:center)}
=begin
Justify columns of textual tabular input where the record separator is the newline
Line 3,830 ⟶ 3,819:
=end
def aligner(infile, justification = 'L')
justifier = J2justifier[justification]▼
fieldsbyrow = infile.map {|line| line.strip.split('$')}
# pad to same number of fields per record
maxfields = fieldsbyrow.map
fieldsbyrow.map! {|row| row + ['']*(maxfields - row.length)}
# calculate max fieldwidth per column
colwidths = fieldsbyrow.transpose.map {|column|
column.map
}
# pad fields in columns to colwidth with spaces
▲ justifier = J2justifier[justification]
fieldsbyrow.map
row.zip(colwidths).map {|field, width|
}.join(" ")
}.join("\n")
end
require 'stringio'
▲textinfile = <<END
▲Given$a$text$file$of$many$lines,$where$fields$within$a$line$
▲are$delineated$by$a$single$'dollar'$character,$write$a$program
▲that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$
▲column$are$separated$by$at$least$one$space.
▲Further,$allow$for$each$word$in$a$column$to$be$either$left$
▲justified,$right$justified,$or$center$justified$within$its$column.
▲END
for align in %w{Left Right Center}
| |||