Lastly, a pretty common use case for escape sequences that you might encounter in Python is ANSI escape codes, which control the formatting and display of text in your terminal. For example, the following string
What does "object destructuring" mean and what is the result of a destructuring operation?Say you have an object with some properties:const person = { firstName: 'Tom', lastName: 'Cruise', actor: true, age: 57 }You can extract just some of the object properties and put them into ...
In the other cases, we’ll have errors.A general rule of thumb is to always define functions, variables, objects and classes before using them, to avoid surprises.Suppose we have a function:function bark() { alert('wof!') }Due to hoisting, we can technically invoke bark() before it ...
Same for undefined: age === undefinedIn both cases, you can check for:if (!age) { }and this will be matching both null and undefined.You can also use the typeof operator:let age typeof age //'undefined'although null is evaluated as an object, even though it is a primitive type:...
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