Java Script

String

1 a.

b.

c.

d

Write a function named isPerfectPangram that accepts a string and returns true if the string is a perfect pangram. As covered in the previous problem, isPangram, a pangram is any phrase that contains at least one of each of the 26 letters in the English alphabet (ignoring letter-casing) A pangram is considered "perfect" if and only if it contains a single occurrence of each letter in the alphabet (non-alphabetic characters are ignored). For example, a call to isPangram("Mr. Jock, TV quiz PhD, bags few 1ynx.") should return true since it contains exactly one occurance of each 26 letters in the alphabet. However, a call of isPangram("The quick brown fox jumps over a lazy dog.") should return false since some letters occur more than once (e-g.. "a" and "o"). Write a function named isPangram that accepts a string and returns true if the string is a pangram. A pangram is any phrase that contains at least one of each of the 26 letters in the English alphabet (ignoring letter-casing). For example, a call to isPangram "The quick brown fox jumps over a lazy dog." should return true since it includes all 26 letters of the English alphabet (duplicate letters can be ignored) Write a function named repeat that accepts a string and a number of repetitions as parameters and returns the String concatenated that many times. For example, the call of repeat ("echo...".3) 3) f the number of repetitions is 0 or less, retu returns "echo...echo.echo...". I rn an empty string. Write a function named anagrams that accepts two string paramters and returns true if the second string is an anagram of the first. A string is an anagram of another string if both strings contain the same characters (ignoring case and non-alphabetic characters). For example, the call of anagrams("A decimal point", "I'm a dot in place!") should return true since both strings contain the same letters. However, the call anagrams ("Decimal point", "I'm a dot in place!") should return false because even though both strings contain the same letters, the second string has one more "a" than the first string