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Aditya Puri
1,080 PointsWhy can't I do this same thing using if(noun === "dork") ??
Why can't I do this same thing using if(noun === "dork") ??
Whenever I try to do so, I get an error.
Does "===" only compare 2 numeral values? Is that why it doesn't work?
3 Answers
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 PointsTriple equal === is used in JavaScript ( and may be in other Languages I don't know), but not in Java. If as I hope you are running the code in Java, then when comparing strings use equalsTo method, here is post on Stack about different types of comparison:
http://stackoverflow.com/questions/513832/how-do-i-compare-strings-in-java
Also Craig has a wonderful workshop about comparing Strings. Please take a look if you want to understand more:
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 PointsStack overflow is a very dense answer. I strongly advice you to watch workshop. (Craig is explaining a bit more) and the return here:
Dustin Bryce Flanary
17,663 PointsA comment in another StackOverflow post helps a bit:
"You use operator!= or operator== when you want to check for identity of two objects [if they are actually the same object]
"You use equals() when you want to check for equality. [if two object are equal, as the equals() method defined them].
"It is hard to know what exactly you are trying to achieve, but usually when comparing two reference objects, we want to use equals()." [Ref: http://stackoverflow.com/questions/9537351/how-to-compare-two-objects-references-in-java]
Basically, fooStrings1 & fooStrings2 are different objects [that refer or point to the same variable]. == checks to see if the objects are the same. equals() will check if they have the same value.
Aditya Puri
1,080 PointsAditya Puri
1,080 PointsWhat does he means when he says the '"bar" == "bar" will evaluate to true' BUT '"fooStrings1" == "fooSrings2" wont' in the 2nd best answer?
Is this because 2 equal raw string values (like "abc" and "abc") are considered as the same objects whereas 2 String variables, both of which contain the same string are considered as 2 different objects?
And "==" only compares objects so it will give false?