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ruby interpolate string pad right

klueless-io answered on October 19, 2022 Popularity 2/10 Helpfulness 8/10

answer ruby interpolate string pad right

ruby interpolate string pad right

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'%3.3s' % 'f'			# "  f"
'%3.3s' % 'foo'			# "foo"
'%3.3s' % 'foobar'		# "foo"
# NOTE: The % examples will cause rubocop issues
#       Style/FormatString: Favor format over String#%.

format('%3.3s', 'f')	# "  f" - Use format instead of String#% 

# Padding on right, use -
'%-3.3s' % 'f'			# "f  "
'%-3.3s' % 'foo'		# "foo"
'%-3.3s' % 'foobar'		# "foo"
format('%-3.3s', 'f')	# "f  " - Use format instead of String#%

# Pad numbers
"%03d" % 1    			#=> "001"
"%03d" % 10   			#=> "010"
"%03d" % 100  			#=> "100"
"%03d" % some_id

# Using format for debug logging of key/value messages

format('%-20s %s', 'component', name) # "component            03"

# or avoid rubocop warning: Style/FormatStringToken: Prefer annotated tokens (like %<foo>s) over unannotated tokens (like %s)
format('%-20<key>s %<value>s', key: 'component', value: name) # "component            03"

Popularity 2/10 Helpfulness 8/10 Language ruby

Source: stackoverflow.com

Tags: pad ruby string

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