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In Java, something like i++ would increment i by 1.
How can I do in Ruby? Surely there has to be a better way than i = i + 1?
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Ruby has no pre/post increment/decrement operator. For instance, x++ or x-- will fail to parse. More importantly, ++x or --x will do nothing! In fact, they behave as multiple unary prefix operators: -x == ---x == -----x == ......
It turns out that the author of Ruby, matz suggests the official way to increment and decrement variables in ruby is by using the += and -= operators.
<< and + are methods (in Ruby, santa << ' Nick' is the same as santa. <<(' Nick') ), while += is a shortcut combining assignment and the concatenation method.
Strings primarily exist within either single quotes ( ' ) or double quotes ( " ) in Ruby, so to create a string, enclose a sequence of characters in quotes, like this: "This is a string in double quotes."
From the documentation,
Ruby has no pre/post increment/decrement operator. For instance, x++ or x-- will fail to parse
So, you can do
i += 1 which is equivalent of i = i + 1
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