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arrays.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Javascript</title>
</head>
<body>
<h1>Hello bb</h1>
<div id="output"></div>
<script>
var empty = [];
empty[0] = 1;
empty[1] = 2;
// alert(empty);
var primes = [1, 2, 3, 5, 7, 11];
var thirdPrime = primes[2];
// alert(thirdPrime);
var myArray = [1, "Hello", false];
var truth = myArray[2];
// alert(truth);
var myArrayLength = myArray.length;
// alert(myArrayLength);
function range(max){
var retVal = [];
for ( var i = 0; i < max; i++ )
{
retVal[i] = i * 2;
}
return retVal;
}
// alert(range(7));
// each individual method
function range(max){
var retVal = [];
for (var i = 0; i < max; i++)
{
retVal.push(i * 2);
}
var last = retVal.pop();
alert(last);
return retVal;
}
// alert(range(7));
// function range(max){
// var retVal = [];
// for (var i = 0; i < max; i++ )
// {
// retVal.push(i * 2);
// }
// return retVal;
// }
// var myArray = range(5);
// for ( var i = 0; i < myArray.length; i++ )
// {
// alert(myArray[i]);
// }
// individual Method
var string1 = "The quick brown fox jumps over the \"lazy\" cat ";
var string2 = 'The quick brown fox jumps over the "lazy" cat ';
// without a space in cat '---produce a issue showed like this = ca'
var newString = string1 + string2;
// alert(newString);
var myArray = newString.split(" ");
// alert(myArray);
var indexOfBrown = newString.indexOf("brown");
var indexOfJumps = newString.indexOf("jumps");
var myFox = newString.slice(indexOfBrown, indexOfJumps);
alert(myFox);
// Use + operator for concatenation
// chartAt(index) methods for strings
// indexOf(string)
// split cuts a string into an array
// slice copies a piece of the string
/////////////////////////////////////////
// regular expresssions for strings
// as is = myString.search( / /); wherever you put into pharestesis apear in this slashs
var myString = "The quick brown joly jumps over the \"lazy\" dog";
var offset = myString.search(/\b[a-z]{5}\b/);
alert(offset);
</script>
</body>
</html>