jbr/sibilant

Javascript with a lisp

Jason Fu

@jasonfu9966

that'd be neat

by the way, in case you've haven't heard why there have been becoming interested in Sibilant in the last few months... it's because a company has included it in their interview loop

hello, future interviewees

Jacob Rothstein

@jbr

whoa really? that’s awesome

are you affiliated with the company?

Jason Fu

@jasonfu9966

I'll PM you details so nobody can see the answers

Jacob Rothstein

@jbr

:thumbsup:

George Offley 🏳️‍🌈

@georgeoffley_twitter

Hello everyone! I'm just starting to learn sibilant and I am trying to figure out how to call key vs values for hash objects.

(var tasks (hash "task 1" "task dependent 1" "task2" "task dependant2"))

That's my code for the hash object and I am trying to find a way to call the values (or the task dependents). I can see that I can loop through the keys but the docs don't seem clear on how to reference the corresponding values. Or maybe I'm just not clear on it.

If someone could help that would be awesome.

George Offley 🏳️‍🌈

@georgeoffley_twitter

Never mind, just discovered get for grabbing values for specific keys. I'm dumb, just read the docs lol

Still I gotta say, I've never even looked at lispy type languages and this is kinda nuts lol

Jacob Rothstein

@jbr

:wave: hi @georgeoffley_twitter you can also build a hash using json syntax, like (var tasks {“task 1”: “task dependent 1”, “task 2”: “task dependant2”})

and you can use any of the functions for interacting with objects that are in js, like Object.keys and Object.values

and to go from a key to a value, as you found, there's (get tasks “task 1”) or similar

which compiles to tasks[“task 1”]. if the keys are like ”task1" instead of ”task 1”, you can access them with dot notation (tasks.task1), just like in javascript

George Offley 🏳️‍🌈

@georgeoffley_twitter

Thanks!

That's actually good to know, I'm trying to figure out why I'm getting errors for what I built and I think rewriting some of it would help!

George Offley 🏳️‍🌈

@georgeoffley_twitter

Actually, if anyone could take a look and point me in the direction of where I'm going wrong I'd be grateful

(def ordered-tasks (task-list current-task)
    (var tasks-in-order [])

    (while (> (length tasks-in-order) 3)
        (var dependent-task (get task-list current-task))
        (if
            (= "" (get task-list dependent-task)) 
                (append dependent-task tasks-in-order)
            (append current-task tasks-in-order)
        )
    )

        (console.log tasks-in-order)
)


(ordered-tasks(tasks "make a sandwich"))

When I try to run that I get TypeError: orderedTasks(...) is not a function

The logic isn't exactly where I need it to be but I can't get this to run

The tasks argument is a hash type object as pointed out above

George Offley 🏳️‍🌈

@georgeoffley_twitter

Actually. I think I got it to run. Only issue now is the confusing way while loops and the if conditionals are set up

Ricardo Figueroa Riestra

@rfigueror1

Hi there, how can I concatenate arrays together? I am trying [1 2 4].concat( [3 5 8]).

Jacob Rothstein

@jbr

Scroll up for a discussion of that. [...[1 2 4] ...[3 5 8]] would work

(Or more commonly, with variables instead of sub array literals)

Ricardo Figueroa Riestra

@rfigueror1

thanks!

Jacob Rothstein

@jbr

Or (.concat [1 2 4] [3 5 8])

Ricardo Figueroa Riestra

@rfigueror1

Hi, are multi-line comments supported?

Jacob Rothstein

@jbr

Nope, just one line with ;;

Ricardo Figueroa Riestra

@rfigueror1

thanks

Francisco Felipe Suero

@thecog19

Just getting started with sibilant, i'm trying to do something relatively simple, where i iterate over an array of objects and perform some transformations. My issue is I can't quite figure out how to do two things in one pass. Example to follow:

(each item item-list (
        (
            set item "listed" false
        )
        (item)
        )
    )

works like a charm

 (each item item-list (
        (
            set item "listed" false
            set dict (get item "name") item
        )
        (item)
        )
    )

(and various variations) all seem to not work

I'll keep poking at the documentation, I'm sure its just my unfamiliarity with lisp, but I'd appreciate any help :)

Jacob Rothstein

@jbr

The parens are an important part of the syntax

Each function call needs its own parens

Francisco Felipe Suero

@thecog19

Yeah, I tried something like

 (each item item-list (
        (
            (set item "listed" false)
            (set dict (get item "name") item)
        )
        (item)
        )
    )

but trying to execute more than one instruction has it blow up with

SyntaxError: Unexpected token ;
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at runInSandbox$ (/home/felipe/.nvm/versions/node/v6.10.2/lib/node_modules/sibilant/maps/src/cli.sibilant:16:7)
    at /home/felipe/.nvm/versions/node/v6.10.2/lib/node_modules/sibilant/maps/src/cli.sibilant:116:9
    at /home/felipe/.nvm/versions/node/v6.10.2/lib/node_modules/sibilant/maps/src/cli.sibilant:105:7
    at Array.forEach (native)
    at Object.<anonymous> (/home/felipe/.nvm/versions/node/v6.10.2/lib/node_modules/sibilant/maps/src/macros/lists.sibilant:101:15)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)

Jacob Rothstein

@jbr

You have extra parens

And you don’t need parens around item on the third from last line

Check the parens in the each example

https://docs.sibilant.org/each

Francisco Felipe Suero

@thecog19

That helped, the extra parens were the ones after item-list i appreciate the help :)

Jacob Rothstein

@jbr

Happy to help, thanks for learning sibilant!

swazonic

@sclaybon

Finally found people interested in sibilant. Is this the only forum/chat room for sibilant?

Jacob Rothstein

@jbr

Yep! As far as I know, would be elated to learn that there was another one though

swazonic

@sclaybon

Ok cool. Good to know

Jordan Rickman

@JordanRickman

Can anyone help me with this error? Happens whether I run globally (npm install -g sibilant, then sibilant) or locally from the project directory (npm install sibilant, then npx sibilant).

npx sibilant
Setting up environment with C:\Users\jrickman\env.bat
Error: ENOENT: no such file or directory, open 'undefined/.sibilant.history'
    at Object.openSync (fs.js:462:3)
    at Object.<anonymous> (C:\Main\Tresor\Dev\stitch-sibilant-challenge\node_modules\sibilant\maps\src\repl.sibilant:26:12)
    at Module._compile (internal/modules/cjs/loader.js:1137:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)
    at Module.load (internal/modules/cjs/loader.js:985:32)
    at Function.Module._load (internal/modules/cjs/loader.js:878:14)
    at Module.require (internal/modules/cjs/loader.js:1025:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.cli$repl$ [as repl] (C:\Main\Tresor\Dev\stitch-sibilant-challenge\node_modules\sibilant\maps\src\cli.sibilant:37:7)
    at Object.<anonymous> (C:\Main\Tresor\Dev\stitch-sibilant-challenge\node_modules\sibilant\maps\src\cli.sibilant:78:8)

Jordan Rickman

@JordanRickman

Okay, found the fix and opened a Github issue. Problem is that Node's process.env.HOME is not set by default on Windows.

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