Java Script

String Length

var txt;

varsln = txt.length;

 

str.indexOf

str.lastIndexOf

str.search

 

str.slice

str.substring negative index를 가질 수 없다

 

var fruits = ["Banana", "Orange", "Apple", "Mango"];

fruits.sort():

fruits.reverse();

 

new Date()

new Date(year, month, day, hours, minutes, seconds, milliseconds)

new Date(miliseconds)

new Date(date string)

 

 

Throw and Try to Catch

<p id="demo"></p>
<script>
try {
  adddlert("Welcome guest!");
}
catch(err) {
  document.getElementById("demo").innerHTML = err.message;
}
</script>

 

var x = 16 + 4 + "Volvo";

20Volvo

 

var x = "Volvo" + 16 + 4;

Volvo164