Skip to content

Instantly share code, notes, and snippets.

View test_async_context.js
import async_hooks from 'async_hooks';
import fs from 'fs';
function createSyncOut() {
let indent = 2;
return [
function putln(msg) {
const indentStr = ' '.repeat(Math.max(0, indent));
fs.writeSync(1, `${indentStr}${msg}\n`);
},
@krisselden
krisselden / main.rs
Last active Feb 29, 2020
flatten json RawValue
View main.rs
use serde::de::{Deserialize, Deserializer, MapAccess, Visitor};
use serde_json::value::RawValue;
use std::collections::HashMap;
use std::fmt;
use std::marker::PhantomData;
#[derive(Debug)]
struct TestA<'a> {
a: i32,
rest: HashMap<&'a str, &'a RawValue>,
View hang_heartbeat.js
const http = require("http");
const vm = require("vm");
const fs = require("fs");
function scheduleLoop(schedule) {
function loop(sum = 0) {
schedule(() => loop(doSomeWork(sum)));
}
schedule(loop);
}
View debugPrint.js
/**
* Print object if running with --js-flag="--allow-natives-syntax"
*/
const __debugPrint = (() => {
try {
return new Function("x", "%DebugPrint(x)");
} catch (e) {
return () => void 0;
}
})();
View trace-code.sh
#!/usr/bin/env bash
# check for CHROME_PATH env or just default
cmd=${CHROME_PATH:-$HOME/chromium/src/out/Default/Chromium.app/Contents/MacOS/Chromium}
if [ -z "$1" ]
then
echo "Usage: `basename $0` [url]"
exit 1
fi
View InnerStackProto.diff
< DebugPrint: 0x4738baeff9: [JS_OBJECT_TYPE] in OldSpace
---
> DebugPrint: 0x47a334ac31: [JS_OBJECT_TYPE] in OldSpace
7,15c7,15
< #slice: 0x00479ca7bfc1 <JSFunction n.slice (sfi = 0x47a98760d9)> (const data field 1)
< #sliceInner: 0x00479ca7c001 <JSFunction n.sliceInner (sfi = 0x47a9876131)> (const data field 2)
< #copy: 0x00479ca7c041 <JSFunction n.copy (sfi = 0x47a9876189)> (const data field 3)
< #write: 0x00479ca7c081 <JSFunction n.write (sfi = 0x47a98761e1)> (const data field 4) properties[0]
< #writeJs: 0x00479ca7c0f1 <JSFunction n.writeJs (sfi = 0x47a9876241)> (const data field 5) properties[1]
< #writeRaw: 0x00479ca7c131 <JSFunction n.writeRaw (sfi = 0x47a9876299)> (const data field 6) properties[2]
View canary_mac_crash.js
const { spawnChrome } = require("chrome-debugging-client");
const { sleep } = require("race-cancellation");
const fs = require("fs");
const DEVTOOLS_CATEGORIES = [
"-*",
"devtools.timeline",
"viz",
"benchmark",
"blink",
View util.rs
use serde::de::DeserializeSeed;
use serde::de::Error;
use serde::de::SeqAccess;
use serde::de::Visitor;
use serde::Deserialize;
use serde::Deserializer;
use std::convert::From;
use std::fmt;
use std::fmt::Display;
use std::marker::PhantomData;
View copy.rs
#[derive(Debug, Clone, Copy)]
enum MyRef<'a> {
String(&'a str),
Bytes(&'a [u8]),
}
impl<'a> Into<&'a str> for MyRef<'a> {
fn into(self) -> &'a str {
if let MyRef::String(s) = self {
s
View lifetime.rs
struct Path<'a> {
path: &'a str,
}
impl<'a> Path<'a> {
fn new(path: &str) -> Path {
Path { path }
}
fn query(&self) -> &'a str {
You can’t perform that action at this time.