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@elliotkim916
Created September 9, 2017 00:03
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Logic Drills
function main() {
try {
doAllTheThings();
}
catch(e) {
console.error(e);
reportError(e);
}
}
function doAllTheThings() {
throw {
message: "Everything's ruined",
name: "FatalException",
toString: function() {
return `${this.name}: ${this.message}`;
}
}
}
function reportError(e) {
$('.js-error-report').text(`Uh oh, something went wrong! Here's what we know: ${e.message}`);
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
$(main);
function doTrafficLights() {
const activeLight = getActiveLight();
if (activeLight === 'red') {
turnRed();
}
else if (activeLight === 'yellow') {
turnYellow();
}
else if (activeLight === 'green') {
turnGreen();
}
}
// this function randomly returns red, yellow, or green
// and is called by doTrafficLights.
// don't modify it!
function getActiveLight() {
return (['red', 'green', 'yellow'])[Math.floor(Math.random() * 3)];
}
/* From here down, you are not expected to
understand.... for now :)
Nothing to see here!
*/
function turnOffLights() {
$('.traffic-light').removeClass('yellow-on red-on green-on');
}
function turnGreen() {
turnOffLights();
$('.green-light').addClass('green-on');
}
function turnYellow() {
turnOffLights();
$('.yellow-light').addClass('yellow-on');
}
function turnRed() {
turnOffLights();
$('.red-light').addClass('red-on');
}
function handleClicks() {
$('.js-control-lights').click(function() {
doTrafficLights();
});
}
$(function() {
turnOffLights();
handleClicks();
});
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