Let’s take a deeper look at it. Below are a few points that simplify the concept of JavaScript Closures for you. A closure is an essential concept that allows functions to retain access to variables from the outer scope even after the outer function has finished executing. In simpler terms...
referenced,// but 'unused' never gets invokedif(priorThing) {console.log("hi"); } }; theThing = {longStr:newArray(1000000).join('*'),// Create a 1MB objectsomeMethod:function() {console.log(someMessage); } }; };setInterval(replaceThing,1000);// Invoke 'replaceThing' once every ...
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set("basemap.title", "World Topographic Map"); // is equivalent to if (map.basemap != null) { map.basemap.title = "World Topographic Map"; } An object with key-value pairs may be passed into set() to update multiple properties at once. // setting a viewpoint on the view view....
The first one (“=”) would set the variable to the value you wanted to compare it with, and the other one would compare it to the value and return true or false. So if you wrote the following code by mistake, the if clause would always be true and all of the code within if ...
Basically, the inference algorithm approximates the possible concrete runtime values of variables and expressions as sets of abstract values (represented by the class AbstractValue), each of which stands for a set of concrete values. For example, there is an abstract value representing all non-...
If you use callback-based async tests, Mocha will throw an error if done() is called multiple times. This is handy for catching accidental double callbacks. it('double done', function(done) { // Calling `done()` twice is an error setImmediate(done); setImmediate(done); }); ...
Manually execute the JavaScript setPersistent method on all global variables to ensure they are correctly migrated to the new format. For example, run the following JavaScript in the console: for (var name in global) global.setPersistent("global."+name, true); User JavaScript issues (Windows ...
setName(''); return false; } return name; }13.5 Don’t chain variable assignments. eslint: no-multi-assign Why? Chaining variable assignments creates implicit global variables. // bad (function example() { // JavaScript interprets this as // let a = ( b = ( c = 1 ) ); // The...
Any properties can be set, retrieved or listened to. See the Watch for changes topic. Hide inherited properties NameTypeSummaryClass declaredClass String The name of the class. Accessor length Number The number of items in the Collection. Collection Property Details declaredClass Inherited Property...