jbr/sibilant

Javascript with a lisp

Jacob Rothstein

@jbr

"it's just javascript" so https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort works

(var x [ 4 1 5 2 3])
(.sort x)
(console.log x) ;; ⇒ [ 1 2 3 4 5 ]

Shivansh Suhane

@shivansh_suhane_twitter

That's super cool! I was getting weird errors trying it as the syntax was wrong 😅

Jacob Rothstein

@jbr

and for reverse: (.reverse x). to chain reversing and console.logging, check this out: (|> [ 1 2 3 4] .reverse console.log) which is the same as console.log([ 1, 2, 3, 4 ].reverse())

you can also just do (x.sort) or (x.reverse) instead of (.sort x) or (.reverse x), they both work

Shivansh Suhane

@shivansh_suhane_twitter

Ah interesting, I was doing something like:

(var result Object.entries(d))
(.sort result)
(.reverse result)
(console.log result)

but the chain linking is super cool

Could we sort by the second value in a 2-d array?

Jacob Rothstein

@jbr

yeah, that would be an argument to the Array.prototype.sort function

Shivansh Suhane

@shivansh_suhane_twitter

Think I understand the JS version:

function comparator(a, b) {
if (a[1] > b[1]) return -1
if (a[1] < b[1]) return 1
return 0
}

myArray = myArray.sort(comparator)

Jacob Rothstein

@jbr

so sorting by the second element in sibilant might look like:

(var x [[0 1] [ 3 5] [ 0 0 ]])
(.sort x (#([a b] [c d])
  (if (< b d) -1
      (= b d) 0
      1)))
(console.log x)

(if i got the logic right)

Shivansh Suhane

@shivansh_suhane_twitter

That worked like a charm. Thanks!

Jacob Rothstein

@jbr

:tada:

Shivansh Suhane

@shivansh_suhane_twitter

🥳🥳

motivate

@motivate:matrix.org

[m]

I need your help

regarding sorting this

I want my count to be printed in descending order

but I am not able to do it in sibilant

please help

I am using this

code

from above reference

Jacob Rothstein

@jbr

could you reformat that as one code block? it's hard to tell what you're doing

I don't see anything about sorting in that code block

motivate

@motivate:matrix.org

[m]

it is giving me output for input: (var strings (list 'hello 'hi 'hi 'hello 'hi))

output: { hello: 2, hi: 3 }
undefined

@jbr

@jbr: I have not done sorting in this code

Jacob Rothstein

@jbr

could you reformat the code into a single block? i can't really tell what's going on

motivate

@motivate:matrix.org

[m]

I want my output to be {hi:3, hello:2} in descending order

okay let me send a picture to you

Jacob Rothstein

@jbr

please just use ```

motivate

@motivate:matrix.org

[m]

Nope I am not able to do it

Jacob Rothstein

@jbr

``` is different from '''

motivate

@motivate:matrix.org

[m]

ohh okay sorry

Jacob Rothstein

@jbr

there's a lot going on here. console.log returns undefined

so arrayToHash returns undefined

motivate

@motivate:matrix.org

[m]

Yes I want to remove this undefined

and I want my array to be printed

with the count of strings

and that too in descending order

Jacob Rothstein

@jbr

so return stringHash instead of (console.log stringHash)

objects in javascript are technically ordered but there is no way to sort them

it's best to treat them as unordered

if you need them to be sorted, you'll want to return something other than an object

motivate

@motivate:matrix.org

[m]

Yes I need to sort them

Can you help me with that

Jacob Rothstein

@jbr

i don't understand what you're trying to output

objects aren't sorted

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