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JavaScript PlanetArray

PlanetArray is a multiple choice game where you apply JavaScript Methods to Arrays and Variables.

JavaScript is the language of the web.
Methods are ways to manipulate an Array
Arrays are rows of things
Variables are single things



New methods are unlocked as you progress, you start with just one.

2 starting arrays :

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the goal :

Mission : Make a combined array.

One starting Array:

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The goal, one Variable and one Array:

Mission: Separate Mercury from the array.

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Mission: Separate Neptune from the array.

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Mission: Insert Mercury and Venus at the beginning of the array, and figure out the new length (8)

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Mission: Append Uranus and Neptune to the end of the array and figure out the new length (8)

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Mission: Unknown

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Mission: Unknown

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Mission: Unknown

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Mission: Unkown

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Mission: Unkown

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Mission: Unknown

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Mission: Insert Mercury at the beginning of the array.

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Mission: Replace Earth and Venus with Mars.

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Mission: Remove Uranus from Array.

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Mission: Remove Neptune from Array.

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Mission: Remove Mercury and Venus from Array.

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Mission: Remove all except Mercury, Venus and Earth.

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Mission: Unkown

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Mission: Unknown

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Mission: Unknown

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Mission: Unknown

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Mission: Unknown

congratulations, you've completed the early alpha !

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shift removes and returns the far most left item (first item)
pop removes and returns the far most right item (last item)
unshift add new items to the left (beginning) and returns the length of the array
push adds new items to the right (end) and returns the length of the array
concat adds strings and arrays to the right (end)
Array.of makes an array out of strings or arrays
splice insert and/or remove items from point in array
slice returns a part of the array

 a = arr.shift()        

  a = arr.pop()        

   size = arr.unshift( a , b , c ) 

    size = arr.push( a , b , c ) 

         a = arr.concat( arr2 , arr3 ) 

 arr2 = arr.sort()         

 arr2 = arr.reverse()         

         arr2 = Array.of( arr , a , b ) 

           arr2 = arr.splice( x , y , a , b , c ) 

 arr2 = arr.slice( x , y )   

   arr.length = x  

 help