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I saw this on a screencast and couldn't figure out what it was. Reference sheets just pile it in with other operators as a general pattern match operator.
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Ruby Arithmetic OperatorsAddition − Adds values on either side of the operator. Subtraction − Subtracts right hand operand from left hand operand. Multiplication − Multiplies values on either side of the operator. Division − Divides left hand operand by right hand operand.
you can use the operator << to push a element into an array or to concatenate a string to another. so, what this is this doing is creating a new element/object Thread type and pushing it into the array.
It lets you add items to a collection or even concatenate strings.
It matches string to a regular expression.
'hello' =~ /^h/ # => 0
If there is no match, it will return nil. If you pass it invalid arguments (ie, left or right-hand sides are not correct), it will either throw a TypeError or return false.
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From ruby-doc :
str =~ obj => fixnum or nil
Match—If obj is a Regexp, use it as a pattern to match against str, and returns the offset position the match starts, or nil if there is no match. Otherwise, invokes obj.=~, passing str as an argument. The default =~ in Object returns false.
"cat o' 9 tails" =~ /\d/ #=> 7 "cat o' 9 tails" =~ 9 #=> false If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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