mingo
Version:
MongoDB query language for in-memory objects
34 lines (33 loc) • 872 B
JavaScript
import { computeValue } from "../../../core";
import { assert, isArray, isEqual, isNil } from "../../../util";
const $indexOfArray = (obj, expr, options) => {
const args = computeValue(obj, expr, null, options);
if (isNil(args))
return null;
let arr = args[0];
const searchValue = args[1];
if (isNil(arr))
return null;
assert(isArray(arr), "$indexOfArray expression must resolve to an array.");
const start = args[2] || 0;
let end = args[3];
if (isNil(end))
end = arr.length;
if (start > end)
return -1;
assert(start >= 0 && end >= 0, "$indexOfArray expression is invalid");
if (start > 0 || end < arr.length) {
arr = arr.slice(start, end);
}
let index = -1;
arr.some((v, i) => {
const b = isEqual(v, searchValue);
if (b)
index = i;
return b;
});
return index + start;
};
export {
$indexOfArray
};