JS String Functions

• Write a function that returns a subset of a string between one index and another. function(str, indexStart, indexEnd) Example (abcd',1,10) return 'bcd') Example 2 (abcd',0,1) return 'ab') (similar built-in function substring or substr).
• Write a function that returns a new string containing all matches. Each match is then replaced by replacement characters, function(str. charToChange, charToReplace) Example (abc', 'a','X') return Xbc
• Write a function that returns an index of the receiving string for the first occurrence of the specified character. Start the search with the fromIndex parameter. Returns - 1 if the value is not found. function(str,searchChar,fromIndex) (similar built-in function indexof)
• Write a function which removes whitespace from both ends of the receiving string. Whitespace in this context is all whitespace characters (spaces, tabs, and newlines.) function(" valuelt ") //return "value"
• Write a function which splits the receiving string parameter into an array of strings by separating the string into substrings and return the array, function (stringToSplit, separator) Example ('albic', T. return ['a','b','c'), (bcAbd, 'A', return [bc', 'bd'), (bacd, 'X' return ['b', 'a','c','d']) (similar built-in function split)
• The trimRight() method removes whitespace from the right end of a string. Whitespace in this context is all the whitespace characters (spaces, tabs, and newlines.) function(" value\t") //return "value"
• Write a function to return a unique concatenated array from 2 arrays //function([1,2],[2,4]) //return [1,2,4]', (Note: similar functionality as Array.concat)

Do not use function

You are not allowed to use any of the built-in functions listed in the Do not use function section of this document. Using any of the following functions will result in zero marks for your assignment.