camelcaseblog

class MyError extends Error {}
try {
    doStuff();
} catch(err) {
    if (err.name == 'MyError') {
        console.log("This is my error");
    } else if (err.name == 'ReferenceError') {
        console.log("Not my error. Ask the ReferenceError guys");
    } else {
        console.log("I have no idea");

camelcaseblog

try {
    throw new Date();
} catch(err) {
    console.log(err);
}

Tue Jun 25 2019 19:12:20 GMT+0300 (Israel Daylight Time)

camelcaseblog

try {
    throw “this is an error”;
} catch(err) {
    console.log(err.name + ': ' + err.message);
}

> undefined: undefined

camelcaseblog

try {
    const y = x
} catch(err) {
    console.log(err.name + ': ' + err.message);
}

> ReferenceError: x is not defined

camelcaseblog

try:
    ratio = a / b
except ZeroDivisionError:
    ratio = float(‘inf’)
except TypeError as e:
    logger.critical(‘Got TypeError: %s’, e)

camelcaseblog

try {
    System.out.println(obj.charAt(0));
} catch(NullPointerException e) {
    System.out.println("NullPointerException..");
} catch(MyAwesomeCustomException e) {
    System.out.println("Caught an exception: " + e.myCustomInformation);
}

camelcaseblog

function createPrintFunction(i) {
  return function() { console.log(i); }
}
var functions = []
for (var i = 0; i < 10; i++){
  functions.push(createPrintFunction(i))
}
functions.forEach(f => f())

camelcaseblog

var functions = []
for (var i = 0; i < 10; i++){
  functions.push(() => console.log(i))
}
functions.forEach(f => f())

camelcaseblog

class A {
  f = () => { console.log(1); }
  g = () =>  setTimeout(() => this.f(), 1000)
}
function f() { console.log(2); }
var a = new A()
a.g()
> 1

camelcaseblog

class A {
  f() { console.log(1); }
  g(){ setTimeout(function() { this.f(); }, 1000)}
}
function f() { console.log(2); }
var a = new A()
a.g()
> 2