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strings and objects in JavaScript
1.
Strings and Objects
2.
STRING
3.
“...”
4.
var str_var =
“...”
5.
str_var.length
6.
startsWith(str) & endsWith (str) & indexOf (str,
pos) & lastIndexOf (str, pos) split(separator) & contains(str) & substr(start, len) & substring(start, end)
7.
OBJECT
8.
{}
9.
var obj_var =
{}
10.
var obj_var =
{ prop_name : “prop”, method_name : function () { // method name } }
11.
obj_var. prop_name
12.
obj_var[‘prop_name’]
13.
obj_var. method_name()
14.
obj_var[‘method_name’]()
15.
this
16.
var obj_var =
{ prop_name : “prop”, method_name : function () { console.log( this.prop_name ) } }
17.
window
18.
var prop_name =
“data”; var obj_var = { prop_name : “prop”, method_name : function () { console.log(prop_name ); } }
19.
Primitive vs Reference
Type
20.
Data Wraper Utility Object Array Function Boolean Number String Math Date RegExp
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