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Cake day: July 31st, 2023

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  • Konlanx@feddit.detoProgrammer Humor@lemmy.mlWith PieMixin
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    1 year ago

    This is likely referring to TypeScript.

    TypeScript has all of these patterns, they are used very frequently and they are necessary because TypeScript tends to be interesting from time to time since its types only exist at compile time, because it compiles to JavaScript, which is a language without types.

    TypeScript also allows any as a keyword, which says “I don’t know which type this is and I don’t care”, which still produces valid JavaScript. To get back to typed variables it is necessary to use typeof (or similar constructs like a type guard).

    https://www.typescriptlang.org/docs/handbook/2/typeof-types.html










  • JS !== Java

    Try Javascript some day!

    • We have truthy and falsy! Empty string or null? Yeah, that’s false!
    • Of course we can parse a string to number, but if it’s not a number it’s NaN!
    • null >= 0 is true!
    • Assign a variable with =, test type equality with == and test actual equality with ===. You will NEVER use the wrong amount of = anywhere, trust me!
    • Our default sort converts everything to string, then sorts by UTF-16 code. So yes, [1, 10, 3] is sorted and you are going to live with it.
    • True + true = 2. You know I’m right.

    Try Javascript today!