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In JavaScript, null is a primitive value that represents the intentional absence of any object value. It's often used to indicate that a variable or property intentionally holds no value or that an object reference points to nothing. null is a distinct value from undefined and has its own ...
NaN is a non-writable global variable. In normal code assigning to NaN does nothing; the developer receives no failure feedback. In strict mode assigning to NaN throws an exception. Any assignment that silently fails in normal code (assignment to a non-writable global or property, assignment ...
How to add a global variable to the TypeScript environment? Can interface be inherited? What does & mean in typescript? What is the difference between interface and type? What does enum mean as a type? What does the declare module '*.scss' of xxx.d.ts in the project mean?declare modu...
What does it mean for a variable in the Application Editor to be defined as a parameter?() A. The variable can be used to pass data to and from subflows. B. The value for that variable can be ...
Arrow functions, by default, do not define athiskeyword, meaning that they do not have their ownthisbinding. If you define athiskeyword within an arrow function, it’s no different from declaring a regular variable in JavaScript. It will lexically resolve to some enclosing scope that does def...
In the history of ECMAScript, we've seen multiple times where the assignment operator wascombinedwith other operators to create shorter expressions of commonly used combinations. In JavaScript, if you want to add5to a variablexyou can shortenx = x + 5tox += 5. ...
What does “Use of unassigned local variable” mean? The compiler isn't smart enough to know that at least one of yourifblocks will be executed. Therefore, it doesn't see that variables likeannualRatewill be assigned no matter what. Here's how you can make the compiler understand: ...
What is the difference between i++ and ++i when incrementing a variable? What is the difference between for-each loop and for loops in java? 1. JavaScript is called client-side programming because it runs not on the web server but on what? 2. Write the script tag that will execut...
What does Boolean mean? What are Boolean operators? In Java, what is the difference between a boolean and a Boolean? What is a conditional operator in C? What is the relationship between a Boolean equation and a truth table? What type of value is the outcome of the condition in a do ...