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Comparison with operator ==, how does it work?


Comparison with operator ==, how does it work?

By : user2956633
Date : November 22 2020, 10:56 AM
wish helps you Comparison 3 will not compile: it tries to compare an array to a scalar.
Comparisons 4 and 5 involve primitives and are done by value. There are no references or autoboxing involved. Therefore the following is not relevant here:
code :


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How does the Erlang comparison operator work exactly?

How does the Erlang comparison operator work exactly?


By : Jan Kusy
Date : March 29 2020, 07:55 AM
This might help you A has the ASCII code 65, a has the ASCII code 97 thus "A" < "a". To quote the inventor: "The actual order is not important - but that a total ordering is well defined is important". This is because you want all terms to be comparable as only in that case you can sort them (which is often of use).
The exact rules are given in http://www.erlang.org/doc/reference_manual/expressions.html#id77480:
Comparison doesn't work with the <= operator

Comparison doesn't work with the <= operator


By : tannoy
Date : March 29 2020, 07:55 AM
This might help you I have the following C++ code : ,
Where is the error ?
code :
cout << setprecision(20) << 1.8 + test << " " << boolalpha << (1.8 + test <= 2) << endl;

// Output: 2.0000000029802320611 false
float tolerance = 1e-6;
cout << 1.8 + test << " " << boolalpha << (1.8 + test <= 2 + tolerance) << endl;
Convert a string representation of a comparison operator to an actual comparison operator

Convert a string representation of a comparison operator to an actual comparison operator


By : srikanth
Date : March 29 2020, 07:55 AM
around this issue While this might be possible in some languages, JavaScript is not one of them.
Personally I think it's a bad idea, as it comes dangerously close to eval territory. I think you should whitelist the operators and define their behaviour:
code :
switch(comparator) {
    case "<=": return first.id <= second.id;
    case "===": return first.id === second.id;
    // ...
    // you can have synonyms:
    case ">=":
    case "gte": return first.id >= second.id;
    // or even nonexistant operators
    case "<=>": // spaceship!
        if( first.id === second.id) return 0;
        if( first.id < second.id) return -1;
        return 1;
    // and a catch-all:
    default:
        throw new Error("Invalid operator.");
}
How Pandas DataFrame work with comparison operator?

How Pandas DataFrame work with comparison operator?


By : user3729607
Date : March 29 2020, 07:55 AM
I wish this helpful for you Why df>0 returns another DataFrame? Is this "operator overload"? (maybe I used the wrong term) ,
Why df > 0 returns another DataFrame?
code :
positiveDf = df[df > 0]
Why comparison operator == does not work for strings in perl?

Why comparison operator == does not work for strings in perl?


By : Vincent Hu
Date : October 07 2020, 11:00 PM
Any of those help You are mistaken. The numerical equality comparison operator works perfectly fine with strings!
code :
$ perl -e'CORE::say "123" == "123.0" ? "same" : "different"'
same

$ perl -e'CORE::say "123" == "123.1" ? "same" : "different"'
different
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