calcium-lang/dist/builtin/list.js

Calcium language interpreter

import { retrieveValue } from "../util";
import { createList, createStr } from "../factory";
import { NotIterable } from "../error";
/**
 * built-in `list()` function
 * @param args accept an argument that is iterable
 * @param env
 * @returns a list object
 */
const list = (args, env) => {
    const src = retrieveValue(args[0], env);
    if (typeof src === "string") {
        return createList(Array.from(src).map((v) => createStr(v)));
    }
    else if (Array.isArray(src)) {
        return createList(Array.from(src));
    }
    else if (src && typeof src === "object") {
        // src is a "dict" object.
        return createList(Object.keys(src).map((v) => createStr(v)));
    }
    throw new NotIterable();
};
export default list;
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