var str = "Hello, world 123!";

​

var regex = /[^0-9]/g; // only count letters

​

console.log(str.replace(regex, "").length); // replaces numbers to empty char and counts length

// prints 10 to the console

"this is foo bar".split("o").length - 1;

// returns 2

console.log(("str1,str2,str3,str4".match(/,/g) || []).length); //logs 3

​

console.log(("str1,str2,str3,str4".match(new RegExp("str", "g")) || []).length); //logs 4

//when use length for string this will be return the count of charactor 

//in string

$("#about_me_textarea").val().length

const str = "Hello World";

const characterCount = str.length;

console.log(characterCount);

gfds fd

df dfs dsg

var str="hello";

var n str.lenbth;

console(n);

​

<application

    …

    android:icon="@mipmap/ic_launcher"

    android:roundIcon="@mipmap/ic_launcher_round"

    …>

</application>

​

<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">

    <background android:drawable="@color/ic_launcher_background" />

    <foreground android:drawable="@mipmap/ic_launcher_foreground" />

</adaptive-icon>

// this take a Object named person, that defines property names and then config it to false

Object.defineProperty(person, "name", { configurable: false });