javascript. remove items in a nested array -


i practicing - getting fluent arrays. created 2 arrays: 

var arr   var arr2

i pushed them.
spliced them.
merged them.
removed them.

my objective remove first 2 indexes (carl , erich) arr
put them array in first 2 index positions.
can see, somehow inserted them 'nested' array.

i have tried searching documentation have not found best practice this.
know simple.

while practicing code in console using following commands:

var arr =['carl','erich','rob','nate']; arr ["carl", "erich", "rob", "nate"] arr.push('joe','tim','steve'); 7 arr ["carl", "erich", "rob", "nate", "joe", "tim", "steve"] var arr2 = ['dan','fred','paul']; arr2 ["dan", "fred", "paul"] array.prototype.push.apply(arr, arr2);  // intermediate testing commands using splice    arr ["joe", "tim", "rob", "dan", "fred", "paul", 0, 4, "carl, erich"]    // splice 2 numbers array   var removed = arr.splice(6, 4); arr ["joe", "tim", "rob", "dan", "fred", "paul"]  // trying insert carl, erich, nate, rob starting @ index 0   var removed = arr.splice(0, 4, ['carl','erich','nate','rob']); arr [array[4]        ,"fred", "paul" 0: "carl" 1: "erich" 2: "nate" 3: "rob" length: 4__proto__

also, why mdn documentation use 'remove' insert ?

mdn using remove insert??


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