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JavaScript (Node.js), 41 40 bytes Saved 1 byte thanks to Shaggy x=>x.map(e=>e?a.push(e):a.pop(),a=[])&&a Try it online! x => //x is the input x.map(e=> //For every...

posted 3y ago by user‭ · edited 3y ago by user‭

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#2: Post edited by

user‭ · 2021-06-22T23:26:47Z (over 3 years ago)

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~~# [JavaScript (Node.js)], 41 bytes~~
x=>(a=[],x.map(e=>e?a.push(e):a.pop()),a)
~~[Try it online!][TIO-kpbjv5ub]~~
[JavaScript (Node.js)]: https://nodejs.org
[TIO-kpbjv5ub]: https://tio.run/##bYzdCsIwDEbvfZIEYqnO4Q9kPsjYRZidTmZb1il7@1qKIqicm3DOR67ykNCOvZ@W1p1MjB3PXIFw3dCsbuLBcGWOovw9XMDgIV3OAyIJRj/2duLW2eAGowZ3XmQDHdSa3pS0bRA/ZUXrZIsvVyZ0Lpp2P/uCNrns/3x6kUp8Ag "JavaScript (Node.js) – Try It Online"
```
~~x => ( //x is the input~~
~~a=[], //The accumulator to be returned (initially empty)~~
x.map(e=> //For every element e in x
~~e? //If e is not 0~~
a.push(e) //Add it to the accumulator
~~:a.pop()), //Otherwise, pop the last element~~
~~a) //Return the accumulator~~
```

# [JavaScript (Node.js)], <s>41</s> 40 bytes
Saved 1 byte thanks to Shaggy
x=>x.map(e=>e?a.push(e):a.pop(),a=[])&&a
[Try it online!][TIO-kq8oe3ra]
[JavaScript (Node.js)]: https://nodejs.org
[TIO-kq8oe3ra]: https://tio.run/##y0osSyxOLsosKNHNy09J/Z9m@7/C1q5CLzexQCPV1i7VPlGvoLQ4QyNV0wrIyi/Q0NRJtI2O1VRTS/xfUJSZV2KbnJ9XnJ@TqpeTn84FFtFI04g20IFBUx3zWE1NhIyhjhFQ1BhNzBQIDcAyBjoWGOqNdUzAMpZYTIJCoMx/AA "JavaScript (Node.js) – Try It Online"
```
x => //x is the input
x.map(e=> //For every element e in x
e? //If e is not 0
a.push(e) //Add it to the accumulator
:a.pop(), //Otherwise, pop the last element
a=[]) //Initial value of the accumulator
&&a //Return the accumulator
```

#1: Initial revision by

user‭ · 2021-05-30T19:04:12Z (over 3 years ago)

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# [JavaScript (Node.js)], 41 bytes

<!-- language-all: lang-javascript -->

    x=>(a=[],x.map(e=>e?a.push(e):a.pop()),a)

[Try it online!][TIO-kpbjv5ub]

[JavaScript (Node.js)]: https://nodejs.org
[TIO-kpbjv5ub]: https://tio.run/##bYzdCsIwDEbvfZIEYqnO4Q9kPsjYRZidTmZb1il7@1qKIqicm3DOR67ykNCOvZ@W1p1MjB3PXIFw3dCsbuLBcGWOovw9XMDgIV3OAyIJRj/2duLW2eAGowZ3XmQDHdSa3pS0bRA/ZUXrZIsvVyZ0Lpp2P/uCNrns/3x6kUp8Ag "JavaScript (Node.js) – Try It Online"

```
x => ( //x is the input
a=[],  //The accumulator to be returned (initially empty)
x.map(e=> //For every element e in x
 e?       //If e is not 0
 a.push(e) //Add it to the accumulator
 :a.pop()), //Otherwise, pop the last element
a)    //Return the accumulator
```

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