JavaScriptPractice/string.html at main · EduKeyPath/JavaScriptPractice · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<p>
    "ABCDEFGHIJ\"K\"LMNOPQRSTUVWXYZ" <br/>
    <b>String Lenght :</b> <span id="sL"></span>
</p>
<script>
    var a = "ABCDEFGHIJ\"K\"LMNOPQRS\\TUVWXYZ"
    var b = a.length;
    document.getElementById('sL').innerHTML = b;
</script>

<p>
    "The difference is that is substring() cannot accept negative indexes." <br/>
    <b>Postion of difference (search):</b> <span id="p1"></span> <br/>
    <b>Postion of is (index of):</b> <span id="p2"></span> <br/>
    <b>Postion of negative (last index of):</b> <span id="p3"></span> <br/>
</p>

<script>
    var c = "The difference is that is substring() cannot accept negative indexes.";
    var d = c.search('difference');
    document.getElementById('p1').innerHTML = d;

    var e = c.indexOf('is', 17);
    document.querySelector('#p2').innerHTML = e;

    var f = c.lastIndexOf('negative');
    document.querySelector('#p3').innerHTML = f;
</script>

<p>
    "The method takes 2 parameters: the starting index (position), and the ending index (position)." <br/>
    <b>Slice of (method):</b> <span id="s1"></span> <br/>
    <b>Substring of (takes):</b> <span id="s2"></span> <br/>
    <b>Substr (parameters):</b> <span id="s3"></span> <br/>
</p>

<script>
    var g = "The method takes 2 parameters: the starting index (position), and the ending index (position)."
    var h = g.slice(4, -50);
    document.getElementById('s1').innerHTML = h;

    var i = g.substring(11, 16);
    document.getElementById('s2').innerHTML = i;

    var j = g.substr(19, 10);
    document.getElementById('s3').innerHTML = j;
</script>


<p>
    "The ‘with’ keyword is used as a 'kInd' of shorthand for 'kind' an object's 'Kind' or methods." <br/>
    <b>Replace ‘with’ of SingleReplae:</b> <span id="r1"></span> <br/>
    <b>Replace 'kind' of Global Replae:</b> <span id="r2"></span> <br/>
</p>
<script>
    var k = "The ‘with’ keyword is used as a 'kInd' of shorthand for 'kind' an object's 'Kind' or methods.";
    var l = k.replace('with','SingleReplae');
    document.getElementById('r1').innerHTML = l;

    var m = k.replace(/kind/gi, 'Global Replae');
    document.getElementById('r2').innerHTML = m;
</script>

<p>
    "JavaScript has several built-in or native objects." <br/>
    <b>Upercase:</b> <span id="u1"></span> <br/>
    <b>Lowercase:</b> <span id="l2"></span> <br/>
</p>
<script>
    var n = "JavaScript has several built-in or native objects.";
    var o = n.toUpperCase();
    var p = n.toLowerCase();
    document.getElementById('u1').innerHTML = o;
    document.getElementById('l2').innerHTML = p;
</script>

<p>
    "JavaScript Number Object" <br/>
    "JavaScript Boolean Object" <br/>
    "JavaScript Number Object" <br/>
    "JavaScript Boolean Object" <br/>
    <b>Concat:</b> <span id="c1"></span>
</p>
<script>
    var q = "JavaScript Number Object";
    var r = "JavaScript Boolean Object";
    var s = "JavaScript Number Object";
    var t = "JavaScript Boolean Object";
    var u = q.concat(r + s + t);
    document.querySelector('#c1').innerHTML = u;
</script>

<p>
    " &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  regular expression instead:" <br/>
    <b>trim:</b> <span id="t1"></span>
</p>
<script>
    var v = "             regular expression instead:";
    var w = v.trim();
    document.getElementById('t1').innerHTML = w;
</script>

<p>
    "Extracting String Characters" <br/>
    <b>Extracting(S) char at:</b> <span id="e1"></span> <br/>
    <b>Extracting(S) propery access:</b> <span id="e2"></span>
</p>
<script>
    var x = "Extracting String Characters";
    document.querySelector('#e1').innerHTML = x.charAt(1);
    document.querySelector('#e2').innerHTML = x[0];
</script>

<p>
    "Converting a String to an Array  -  "a,b,c,d,e" <br/>
    <b>Array:</b> <span id="st1"></span>
</p>
<script>
    var z = "a,b,c,d,e";
    var zz = z.split(',')
    document.querySelector('#st1').innerHTML = zz[1];
</script>


<p id="demo"></p>
<script>
    var str = "Hello";
    var arr = str.split("");
    var text = "";
    var i;
    for (i = 0; i < arr.length; i++) {
        text += arr[i] + "<br>"
    }
    document.getElementById("demo").innerHTML = text;
</script>

<p>You access an array element by referring to the index number.</p>
<p id="demo5"></p>
<script>
    var p = "You access an array, element by referring, to the index number.";
    var q = p.split(',');
    /*var q = p.split('');
    var txt = '';
    for (i = 0; i < p.length; i++){
        txt += q[i] + '</br>';
    }
    document.getElementById('demo5').innerHTML = txt;*/
    document.getElementById('demo5').innerHTML = q[0];
</script>

<p id="demo1"></p>
<script>
    var x = 555;
    var y = x.toString();
    document.getElementById('demo1').innerHTML = y;
</script>

<p>toFixed - a = 9.5768589</p>
<p id="demo3"></p>
<script>
    var a = 9.5768589;
    var b = a.toFixed();
    var c = a.toFixed(3);
    document.getElementById('demo3').innerHTML = b;
</script>

<p>toFixed - a = 9.5768589</p>
<p id="demo4"></p>
<script>
    var a = 9.8768589;
    var b = a.toPrecision();
    var c = a.toPrecision(3);
    var d = parseInt(a.toFixed(2));
    var e = parseFloat(a.toFixed(2));
    var f = Number(a.toPrecision(4));
    document.getElementById('demo4').innerHTML = f;
</script>


<br/> <br/> <br/> <br/> <br/> <br/> <br/>
</body>
</html>