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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4427
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.upcase

Returns a copy of str with all lowercase letters replaced with their uppercase counterparts. The operation is locale insensitive.only characters a to z are affected.


str.upcase!

Changes the contents of str to uppercase, returning nil if no changes are made.
 
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.unpack(format)


Decodes str (which may contain binary data) according to the format string, returning an array of each value extracted.

The format string consists of a sequence of single-character directives.

Each directive may be followed by a number, indicating the number of times to repeat with this directive. An asterisk (*) will use up all
remaining elements.
 
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#4429
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.tr!(from_str, to_str)

Translates str in place, using the same rules as String#tr. Returns str, or nil if no changes were made.

str.tr_s(from_str, to_str)

Processes a copy of str as described under String#tr, then removes duplicate characters in regions that were affected by the translation.
 
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#4430
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.rstrip

Returns a copy of str with trailing whitespace removed.

str.rstrip!

Removes trailing whitespace from str, returning nil if no change was made
 
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#4431
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.scan(pattern) [or] str.scan(pattern) { |match, ...| block }


Both forms iterate through str, matching the pattern (which may be a Regexp or a String).

For each match, a result is generated and either added to the result array or passed to the block. If the pattern contains no groups, each individual result consists of the matched string, $&


. If the pattern contains groups, each individual result is itself an array containing one entry per group.
 
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#4432
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
str.match(pattern)

Converts pattern to a Regexp (if it isn't already one), then invokes its match method on str.

str.oct

Treats leading characters of str as a string of octal digits (with an optional sign) and returns the corresponding number. Returns 0 if the conversion fails.
 
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