Web Quiz 6 - Tutorial 10

​Identify a method that extracts array items that match a specified condition.

• reverse()

• sort()

• splice()

• filter()

​The _____ method performs an action similar to the forEach() method except that the function it calls returns a value that can be used to match the contents of an existing array into a new array.

• map()

• splice()

• find()

• sort()

​Identify a true statement of array .find(callback [, thisArg]) method.

• ​It tests whether the condition returned by the callback function holds for at least one item in array.

• It returns the index of the first element in the array that passes a test in the callback function.

• It tests whether the condition returned by the callback function holds for all items in array.

• It returns the value of the first element in the array that passes a test in the callback function.

True or False: ​When each entry in an array matches the entry in another array, it is called a linear array.

• True

• False

​Identify the general syntax of the forEach method.

• array.forEach (value){

  commands

  }

• array.forEach(callback [, thisArg])

• array.forEach [, thisArg]() {

  commands

  }

• array.forEach(callback [value])

True or False: ​Statement labels are used to identify statements in JavaScript code so that the statements can be referenced elsewhere in a program.

• True

• False

​Which of the following methods is used to determine the day of the week on which a month starts?

• find.Day;

• getDay()

• day.calDay()

• calDay;

The _____ method diminishes array from the last element by keeping only those items that return a value of true from the callback function.

• array.map(callback [, thisArg])

• array.every(callback [, thisArg])

• array.findIndex(callback [, thisArg])

• array.reduceRight(callback [, thisArg])

True or False: Index values start with 1 so that the initial item in an array has an index value of 1, the second item has an index value of 2, and so on.

• True

• False

True or False: ​JavaScript supports logical operators that connect several expressions.

• True

• False