Which of the following is true about Map in JS?Answer choicesSelect an optionIt creates a new array populated with the results of calling a provided function on every element in the calling arrayIt executes a reducer function (that you provide) on each element of the array, resulting in single output valueIt creates a new array with all elements that pass the test implemented by the provided functionNone of the mentioned options
Question
Which of the following is true about Map in JS?Answer choicesSelect an optionIt creates a new array populated with the results of calling a provided function on every element in the calling arrayIt executes a reducer function (that you provide) on each element of the array, resulting in single output valueIt creates a new array with all elements that pass the test implemented by the provided functionNone of the mentioned options
Solution
None of the mentioned options
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What is the purpose of the JavaScript map() function?OptionsTo concatenate two arraysTo remove elements from an arrayTo create a new array by applying a function to each element of an existing arrayTo sort an array in ascending order
What is the purpose of the JavaScript reduce() method?OptionsTo filter elements in an arrayTo iterate over the elements of an array and reduce them to a single valueTo reverse the order of elements in an arrayTo remove duplicates from an array
What does the this keyword refer to in a JavaScript constructor function?OptionsIt refers to the first parameter passed to the constructorIt refers to the object being constructedIt refers to the global objectIt refers to the parent object
What does the Promise object in JavaScript represent?OptionsA synchronous operationA regular JavaScript objectAn array of valuesAn asynchronous operation that may produce a value in the future
What does the this keyword refer to in a JavaScript constructor function?OptionsIt refers to the global objectIt refers to the object being constructedIt refers to the parent objectIt refers to the first parameter passed to the constructor
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