Difference between multiple predicates and the logical AND operator

[antstei]

Consider the following example JSON:

var doc = {
    "books" : [
            {
            "id"     : 1,
            "title"  : "Clean Code",
            "author" : { "name" : "Robert C. Martin" },
            "price"  : 7
        },
        {
            "id"     : 2,
            "title"  : "Maintainable JavaScript",
            "author" : { "name" : "Nicholas C. Zakas" },
            "price"  : 12
        },
        {
            "id"     : 3,
            "title"  : "Agile Software Development",
            "author" : { "name" : "Robert C. Martin" },
            "price"  : 15
        }
    ]
};

I wonder now if there is a difference between the usage of multiple predicates,

JSPath.apply('.books{.price < 15}{.price > 5}.title', doc);
//yields ["Clean Code", "Maintainable JavaScript"]

or the logical AND operator (&&),

JSPath.apply('.books{.price < 15 && .price > 5}.title', doc);
//yields ["Clean Code", "Maintainable JavaScript"]

to find all books whose price is between 5 and 15?

[dfilatov]

There's no difference. The result will be the same.

[antstei]

Ok thanks, I see :smile: On the other hand why should multiple predicates still be used when there is an equivalent logical operator which leads to the same result? :confused:

[dfilatov]

There might be more complicated cases which can be resolved only using multiple predicates, for instance: .a{.b}[0]{.c}

[antstei]

Thanks I see :smile: