Deno.truncateSync | /lib.deno.d.ts | ayonli_jsext@v0.9.72

x/ayonli_jsext/lib.deno.d.ts>Deno.truncateSync

A JavaScript extension package for building strong and modern applications.

Latest

archive array augment bundle bytes class cli collections dialog error esm examples external fastly filetype fs hash http json math module number object parallel path promise reader string uint8array workerd ws

index.ts (default module)

parallel

run

AbstractConstructor

AsyncFunction

AsyncFunctionConstructor

AsyncGeneratorFunction

tar

run

EOL

md5

avg

FunctionPropertyNames

sep

cwd

addUnhandledRejectionListener

env

AsyncFunctionConstructor

AsyncGeneratorFunction

function Deno.truncateSync

allow-write

import { Deno } from "https://deno.land/x/ayonli_jsext@v0.9.72/lib.deno.d.ts";
const { truncateSync } = Deno;

truncateSync(name: string, len?: number): void

Synchronously truncates (or extends) the specified file, to reach the specified len. If len is not specified then the entire file contents are truncated.

Truncate the entire file

Deno.truncateSync("my_file.txt");

Truncate part of the file

const file = Deno.makeTempFileSync();
Deno.writeFileSync(file, new TextEncoder().encode("Hello World"));
Deno.truncateSync(file, 7);
const data = Deno.readFileSync(file);
console.log(new TextDecoder().decode(data));

Requires allow-write permission.

Parameters

name: string

optional

len: number

Returns

void