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const array1 = ['a', 'b', 'c'];
const array2 = ['d', 'e', 'f'];
const array3 = [array1, array2];
console.log(array3);
// expected output: Array ["a", "b", "c", "d", "e", "f"]
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let arr1 = [0, 1, 2];
let arr2 = [3, 5, 7];
let primes = arr1.concat(arr2);
// > [0, 1, 2, 3, 5, 7]
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//ES6 using the spread operator
const itemsA = [ 'Lightsaber', 'Mockingjay pin', 'Box of chocolates' ];
const itemsB = [ 'Ghost trap', 'The One Ring', 'DeLorean' ]
const allItems = [ itemsA, itemsB ];
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const concatArrays = (arrays) => {
let concatenatedArray = [];
for(let i=0; i<arrays.length; i++){
if(Array.isArray(arrays[i])){
concatenatedArray.push(arrays[i]);
}
else
return false;
}
return concatenatedArray;
}
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<!DOCTYPE html>
<html>
<body>
<p>We will see after clicking the button how two array will join</p>
<button onclick="concateTwoArray()" id="btnClick">Click</button>
<p id="pId"></p>
<script>
function concateTwoArray() {
var twoDay= ["Sunday", "Monday"];
var fiveDay= ["Tuesday", "Wednsday","Thursday", "Friday","Saturday"];
var totalDay = twoDay.concat(fiveDay);
document.getElementById("pId").innerHTML = totalDay ;
}
</script>
</body>
</html>