// === means equal value and equal type var x = 5 // true x === 5 // false x === "5"
Here is what the above code is Doing:
1. We create a variable called x and set it equal to 5.
2. We check if x is equal to 5. Since it is, we get true.
3. We check if x is equal to “5”. Since it’s not, we get false.
// Concat let first = Observable.timer(10,500).map(r => { return {source:1,value:r}; }).take(4); let second = Observable.timer(10,500).map(r => { return {source:2,value:r}; }).take(4); first.concat(second).subscribe(res => this.concatStream.push(res)); // This will merge the two but you will receive the first observable result before the second: // 0 1 2 3 0 1 2 3 // Merge let first = Observable.timer(10,500).map(r…
const mainWindow = new BrowserWindow({ webPreferences: { webSecurity: false } }) Here is what the above code is Doing: 1. We’re importing the BrowserWindow class from the electron module. 2. We’re creating a new BrowserWindow object. 3. We’re setting the webPreferences property of the BrowserWindow object to an object with a webSecurity property set to…
const now = new Date() // UTC Date String now.toUTCString() // “Sun, 30 May 2021 14:59:15 GMT” // ISO String now.toISOString() // “2021-05-30T14:59:15.449Z” // Unix timestamp Math.floor(now / 1000) // 1622386878 Here is what the above code is Doing: 1. We create a new Date object. 2. We call the toUTCString() method on the Date…
Checkbox. function handleChange(checkbox) { if(checkbox. checked == true){ document. getElementById(“submit”). removeAttribute(“disabled”); }else{ document. getElementById(“submit”). setAttribute(“disabled”, “disabled”); } Here is what the above code is Doing: 1. When the checkbox is checked, the “submit” button is enabled. 2. When the checkbox is unchecked, the “submit” button is disabled.
Modelomodel .findOne({ Id: Id }) .update(body) .exec() Here is what the above code is Doing: 1. Find a document with the Id of Id 2. Update the document with the body 3. Execute the query
process.stdin.resume(); process.stdin.on(“data”, function(data) { console.log(“recieved ” + data) }) process.stdin.write(“foo\n”) process.stdin.write(“bar\n”) Here is what the above code is Doing: 1. We’re creating a new Readable stream called process.stdin. 2. We’re telling the stream to resume, which means that it will start emitting data events. 3. We’re listening for data events on process.stdin. 4. We’re writing…