?
Solved

string search, can it be done faster ?

Posted on 2012-04-03
7
Medium Priority
?
182 Views
Last Modified: 2012-06-27
i am looking for occurrances of the word 'checked' and adding it to an array
var strg;
strg += "Lorem ipsum dolor sit amet";
strg + = "checked";
strg += "Lorem ipsum dolor sit amet";
strg += "Lorem ipsum dolor sit amet";

   k = strg.indexOf("checked");
   
   var dupa = [];
   
  while (k !=  -1)
  {
	  dupa.push(k);
	 k = strg.indexOf("checked",k+10);
	 
   }
  

Open in new window

0
Comment
Question by:Rozamunda
  • 4
  • 3
7 Comments
 
LVL 40

Expert Comment

by:Gurvinder Pal Singh
ID: 37804552
if you simply want to check the number of occurrences of String "checked", then just try this

var strg;
strg += "Lorem ipsum dolor sit amet";
strg + = "checked";
strg += "Lorem ipsum dolor sit amet";
strg += "Lorem ipsum dolor sit amet";

var numberOfInstances =  strg.split("checked").length - 1;


var dupa = [];
for ( var counter = 0; counter < numberOfInstances ; counter++)
{
    dupa[counter] = "checked";
}
0
 

Author Comment

by:Rozamunda
ID: 37804563
not really, actually I want to add to an array the word which is after checked, and starts with '978..'. But I am going to using another index of after I find 'checked' (if this is the most optimal way)
0
 
LVL 40

Expert Comment

by:Gurvinder Pal Singh
ID: 37804582
<<not really, actually I want to add to an array the word which is after checked, and starts with '978..'. But I am going to using another index of after I find 'checked' (if this is the most optimal way)>>
I don't see this in your original question.

You already have an array which is splitted by "Checked", so you know that every item of the array is the word coming after "checked" only. So you can add accordingly
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:Rozamunda
ID: 37804595
ok, so you think is it faster than index of  ? My strings can be very long, max 10000 characters
0
 
LVL 40

Expert Comment

by:Gurvinder Pal Singh
ID: 37804609
everytime you do index of, whole string has to be searched again for the parameter you will be passing for indexOf()

Split() is likely to do the same in one iteration of the characters in the string
0
 

Author Comment

by:Rozamunda
ID: 37804617
But I am passing a second parameter to the indexof telling when to begin the next search (if match was found before)
0
 
LVL 40

Accepted Solution

by:
Gurvinder Pal Singh earned 2000 total points
ID: 37804641
<<But I am passing a second parameter to the indexof telling when to begin the next search (if match was found before)>>
So, how does it become faster than split()? It is just like writing more code to do the same thing
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In my daily work (mainly using ASP.net), I need to write a lot of JavaScript code. One of the most repetitive tasks I do are the jQuery Ajax calls. You know: (CODE) I don't know if for you it's the same, but for me is soooo tedious to write the …
This article will give core knowledge of JavaScript and will head in to your first JavaScript program. I am Durvesh Naik and I am here to deal with this series of JavaScript. I will teach you JavaScript in part wise , as its quite boring to read big…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…
Suggested Courses

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question