Question

In: Computer Science

Javascript 1. Write a function which receives four arguments (array, start, end, delimiter). Copy the array...

Javascript

1. Write a function which receives four arguments (array, start, end, delimiter). Copy the array values from the start to end index separated by delimiter\'s value. function([1,2,3,4],1,3,'*') // returns 2*3*4 as string

2. Write a function to change the case of all the characters in string based on their position which matches the value of the pos parameter passed to function(str, pos [even|odd]). Example: function(‘abCd’, ‘odd’) // returns Abcd

3 Write a function which receives two arguments (array, oddOrEven) based on the value of oddOrEven (odd or even value) the function will return the sum of all the array elements that matches the type of oddOrEven value. function([1,1,2,3,4],11) // returns 5 (which is the sum of all odd numbers)

DO NOT USE THESE BUILT IN FUNCTIONS BELOW

endsWith() includes() indexOf() lastIndexOf() localeCompare() match() repeat() replace() search() slice() split() startsWith() substr() substring() toLocaleLowerCase() toLocaleUpperCase() toLowerCase() toString() toUpperCase() trim() valueOf() trimLeft and trimRight unshift() valueOf()

includes() indexOf() lastIndexOf() localeCompare() match() repeat() replace() search() slice() split() startsWith() substr() substring() toLocaleLowerCase() toLocaleUpperCase() toLowerCase() toString() toUpperCase() trim() valueOf() trimLeft and trimRight unshift() valueOf()   
concat() copyWithin() every() fill() filter() find() findIndex() forEach() indexOf() isArray() join() lastIndexOf() map() pop() push() reduce() reduceRight() reverse() shift() slice() some() sort() splice() toString()

Solutions

Expert Solution

function joinString(array, start, end, delim) {
  if(start <= end) {
    s = array[start]
    i = start + 1
    while(i <= end) {
      s = s + delim + array[i]
      i++;
    }
    return s
  }
}
console.log(joinString([1,2,3,4],1,3,'*'))

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