Q481. What is an Unary operator?
The unary(+) operator is used to convert a variable to a number.If the variable cannot be converted, it will still become a number but with the value NaN. Let's see this ...
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Q482. How do you sort elements in an array?
The `sort()` method is used to sort the elements of an array in place and returns the sorted array. The default sort order is ascending, based on the string Unicode order...
Q483. What is the purpose of compareFunction while sorting arrays?
The compareFunction is used to define the sort order. If omitted, the array elements are converted to strings, then sorted according to each character's Unicode code poin...
Q484. What are the rules of JSX?
The below 3 rules needs to be followed while using JSX in a react application. 1. **Return a single root element**: If you are returning multiple elements from a componen...
Q485. How do you reverse an array?
You can use the `reverse()` method to reverse the elements in an array. This method is useful to sort an array in descending order. Let's see the usage of `reverse()` met...
Q486. What is the reason behind multiple JSX tags to be wrapped?
Behind the scenes, JSX is transformed into plain javascript objects. It is not possible to return two or more objects from a function without wrapping into an array. This...
Q487. How do you find the min and max values in an array?
You can use `Math.min` and `Math.max` methods on array variables to find the minimum and maximum elements within an array. Let's create two functions to find the min and ...
Q488. How do you find the min and max values without Math functions?
You can write functions which loop through an array comparing each value with the lowest value or highest value to find the min and max values. Let's create those functio...
Q489. What is an empty statement and purpose of it?
The empty statement is a semicolon (;) indicating that no statement will be executed, even if JavaScript syntax requires one. Since there is no action with an empty state...
Q490. How do you get the metadata of a module?
You can use the `import.meta` object which is a meta-property exposing context-specific meta data to a JavaScript module. It contains information about the current module...