Timeline for JS exercise to process an array of animals
Current License: CC BY-SA 3.0
8 events
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| Sep 12, 2017 at 21:54 | comment | added | BenC |
@IgorSoloydenko To expand, the shortest version is actually .filter(x => x), which does the boolean conversion implicitly, but .filter(Boolean) is more explicit, reads a bit nicer, and is pointfree in case you get a kick out of that.
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| Sep 12, 2017 at 20:55 | comment | added | Igor Soloydenko |
@Slai makes sense now. Thanks. I did not know that a) the compressed syntax without an arrow is meaningful; b) Boolean has a ctor with any as an argument.
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| Sep 12, 2017 at 20:54 | comment | added | Slai |
@IgorSoloydenko like in C#, instead of lambda .filter(item => Boolean(item)), the method can be passed directly .filter(Boolean)
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| Sep 12, 2017 at 19:12 | comment | added | Igor Soloydenko |
@BenC nice answer. Could you please explain the machinery of the .filter(Boolean)? I see this the second time, so I assume this is idiomatic to JS, but I am still not sure how does it work under the hood.
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| Sep 12, 2017 at 6:44 | comment | added | BenC | Glad you found it useful. In the future, feel free to wait a little while before accepting an answer, in case anyone else chimes in with something better! :) | |
| Sep 12, 2017 at 6:32 | comment | added | Sam | Fantastic response! Really appreciate the explanations. You literally demonstrated the chaining of functions and using lots of short hand. Also avoided using temp variables. That's exactly what I was referring to. Based on your version of the code, my C# accent is not so subtle but I appreciate your being kind :-) Thanks again! | |
| Sep 12, 2017 at 6:29 | vote | accept | Sam | ||
| Sep 12, 2017 at 6:23 | history | answered | BenC | CC BY-SA 3.0 |