# Snippets: AssemblyScript

> Oktul Code Studio snippets for AssemblyScript modules compiled to WebAssembly, as the console's Snippets dialog offers them.
>
> Documentation for Oktul Code Studio, for Jira Cloud and Confluence Cloud, by Oktul: https://oktul.com/docs/plugins/code-studio/snippets/assemblyscript/

These are the AssemblyScript snippets the console offers in a `.as` module. A module computes and reaches nothing: a script imports it and hands it copies of its arguments.

## Sum a list of numbers

An exported function a script imports. A module is handed copies of its arguments and reaches nothing else, so it only computes.

```ts
export function sum(values: Float64Array): f64 {
    let total: f64 = 0;
    for (let i = 0; i < values.length; i++) total += unchecked(values[i]);
    return total;
}
```

## Hash a text

FNV-1a over a string, a fast way to compare large texts. Import it in a script with import &#123; fnv1a &#125; from "./hash.as".

```ts
export function fnv1a(text: string): u32 {
    let hash: u32 = 0x811c9dc5;
    for (let i = 0; i < text.length; i++) {
        hash ^= <u32>text.charCodeAt(i);
        hash *= 0x01000193;
    }
    return hash;
}
```

## Score how alike two texts are

The edit distance between two strings, for finding near-duplicate summaries. Linear memory, no allocations in the loop.

```ts
export function distance(a: string, b: string): i32 {
    const row = new Int32Array(b.length + 1);
    for (let j = 0; j <= b.length; j++) row[j] = j;
    for (let i = 1; i <= a.length; i++) {
        let previous = row[0];
        row[0] = i;
        for (let j = 1; j <= b.length; j++) {
            const current = row[j];
            const cost = a.charCodeAt(i - 1) == b.charCodeAt(j - 1) ? 0 : 1;
            row[j] = min(min(row[j] + 1, row[j - 1] + 1), previous + cost);
            previous = current;
        }
    }
    return row[b.length];
}
```

## Related

- [Writing scripts](../../writing-scripts/)
- [Requests to other systems](../../requests-to-other-systems/)
- [Script examples](../../script-examples/)

---

A problem or a question? Write to [support@oktul.com](mailto:support@oktul.com) or open a request in the [Help Center](https://oktul.atlassian.net/servicedesk/customer/portals). Both reach the same service desk, so either way the request gets a reference and an SLA measuring the response.