# Basic algorithm scripting: Slasher Flick

Basic algorithm scripting: Slasher Flick
0

#1

Hello folk,
I don’t understand how .slice and .splice works…
Please share with me how you did yours…
Mine works;;;but i did it this ways:

``````function slasher(arr, howMany) {
// it doesn't always pay to be first
for (i=0;i<howMany;i++){
arr.shift();
}
return arr;
}

slasher([1, 2, 3], 2);``````

#2

W3school.com is always a good place to get some more info. Here’s the link to the Javascript array reference: http://www.w3schools.com/jsref/jsref_obj_array.asp

#3

`function slasher(arr, howMany) {`

`var output;`

`output = arr.slice(howMany, arr.length);`
`return output;`
`}`

`slasher([1, 2, 3], 2);`

The way slice works is you give it a start point and an end point `slice.(a, b)` and it returns you that portion, and gets rid of the rest so to speak.

so for `[1, 2, 3]`, to get just the 3, I know it starts 2 (because 0, 1, 2), that point is also going to be the same as the `howMany` input. So I used that. I also want to slice after that point, so it’d be 3, or the length of arr, `arr.length` which is 3. SO in short, you want the point the element starts and the point after.

Sorry, this is probably poorly explained.

Another eg. if you had an array, `array = [1, 2, 3, 4, 5]` and you wanted to slice out 3 and 4, you’d go `array.slice(2, 4)`
because `[1, 2, (point 2) 3, 4,(point 4) 5]`

if I just did `arr.slice(2, 3)`, I’d only get 3 because`[1, 2, (point 2) 3, (point 3) 4, 5]`

#4

You could just write “output = arr.slice(howMany);” since slice will continue till the end

#5

Sometimes even the simplest things tend to get very difficult if we don’t know the basics. I suggest that you go through `Basic Javascript` in `FCC` module completely before you attempt Algorithms questions. All these topics are well covered in this module.

Please don’t misinterpret as me being rude to you. I have faced these issues many times (I still do). It helps to go over the basics especially if you have time.

Good luck

Here is my solution.

``````
function slasher(arr, howMany) {
// Slice the array from the given position till the end of an array
return arr.slice(howMany, arr.length);
}

slasher([1, 2, 3], 2);

``````

#6
``````function slasher(arr, howMany){
return arr.slice(howMany,arr.length);}``````