Ruby String Equality

This works because the string class implements a two equal signs method that knows how to compare strings.

Ruby string equality. Object new object new false string new string. The simplest string literals are enclosed in single quotes the apostrophe character. Ruby supports a rich set of operators as you d expect from a modern language. Notice that we use two equal symbols to mean equality.

Because it s implemented differently in each class it will behave differently depending on the type of object it was called on. But what if string didn t implement. For each operator plus. Comparison operators take simple values numbers or strings as arguments and used to check for equality between two values.

Nil is returned if the two values are incomparable. Comparison returns 1 0 1 or nil depending on whether string is less than equal to or greater than other string. B is interpreted as a plus b where the plus. Nil is returned if the two values are incomparable.

If the strings are of different lengths and the strings are equal when compared up to the shortest length then the longer string is considered greater than the shorter one. There is a corresponding form of abbreviated assignment operator. Comparison returns 1 0 1 or nil depending on whether string is less than equal to or greater than other string. But when you want to check for the opposite not true false.

One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. It is not uncommon to need to compare two strings either to assess equality or to find out if one string is higher or lower than the other alphabetically speaking. If you don t this right you won t get the expected results. Then ruby would use object s implementation of which defaults to testing for object identity instead of object contents.

The text within the quote marks is the value of the string this is a simple ruby string literal. For example a plus. Many of ruby s built in classes such as string range and regexp provide their own implementations of the operator also known as case equality triple equals or threequals. Most operators are actually method calls.

With an if statement you can check if something is true.