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notes:javascript_cheat_sheet [2008/09/06 23:38]
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notes:javascript_cheat_sheet [2008/09/07 02:39] (current)
smthng
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 ==== JavaScript Objects ==== ==== JavaScript Objects ====
   * Objects have properties and methods.   * Objects have properties and methods.
 +  * Objects can be created directly <code javascript>
 +personObj=new Object();
 +personObj.firstname="John";
 +personObj.newfirstname =
 + function (new_firstname)
 +   { this.firstname=new_firstname; } </code>
 +  * Objects can be created using a template <code javascript>
 +function person(firstname) {
 +  this.firstname=firstname;
 +  this.newfirstname =
 +    function (new_firstname)
 +    { this.firstname=new_firstname; }
 +}
 +myFather=new person("John");</code>
 +  * Object methods can also be assigned by name e.g. <code javascript>
 +function person(firstname)
 +{
 +  this.firstname=firstname;
 +  this.newfirstname=newfirstname;
 +}
 +function newfirstname(new_firstname)
 +{ this.firstname=new_firstname; } </code>
 +
 +==== Predefined Objects ====
   * String objects have a length property and methods including: indexOf, match, replace   * String objects have a length property and methods including: indexOf, match, replace
   * new Date() creates a Date object (with today's date).   * new Date() creates a Date object (with today's date).
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