If I define two arrays identically and test for their equality I get a "false".
That is,
Code:
So I thought perhaps == could not be used to compare arrays.
But the following:
Code:
Why the first comparison fails?
I've been looking around on the internet search for the right way to check for object equality, but I couldn't really find an answer that I could be sure of to be correct.
I made a vector "class", where mixed types of data can easily be stored in an array. I want to add an equals method to the vector. What is the correct way to check if two objects are equal? Where equal means that both objects hold the same data?
All I need is a script to check whether a field contains an exact code. For example,
A user goes through a game, collects pieces of the code - In this case random numbers or letters to form a 9 digit code.
The user can then enter this code into the field, hit submit and told whether they've cracked the code or not.
So basically something like, if this field contains "123456789" then go to WellDone.html but if it contains anything else other than this code then go to BadLuck.html ,
any ideas? Code:
Is it possible to test whether two objects are equal using the data they contain inside and not comparing their pointers with ==?
Well actually of course there is but...
Is there a way to do it without actually looping through the object, instead maybe something that came with JS? (something like a .equals() method from other programming languages.)
Onchange of the dropdown list, the textfield should display either "testing 3" or "testing 4" but nothing is happening.
<form action='submit.php' method='POST' name='form'>
<select name='preset' onchange='preset(this);'>
<option value='test1'>testing 1</option>
[code]....
Is there any way to test for the presence of the Adobe Acrobat plug-in
in Internet Explorer? It's doable in Netscape but so far I cannot get
it to work in MSIE.
I'm trying to get JSUnit to work - I've tried everything I can think
of, but I can't get the simplest of tests working - example 1 of the
jsunit homepage - Both on my server and locally, nothing happens after
clicking run - or if I'm lucky, a window pops up, blank, other than the
heading "Tracing - JSUnit".
i wrote a rough script to try and test which method of incrementation was faster: i+=1; i++; ++i;
[Code]...
I had a rethink about my problem discussed in this [URL] thread, where the function won't run properly a second time if the page hasn't been reloaded. That one appears not to have a solution, and I was thinking that a reasonable plan B is the following:
a) test if the function has already been run since the page was loaded
b) if not, run the function
c) if it has, reload the page with the onClick, then run the function automatically on reloading.
the problem I envisage is will the page "remember" to run the function once it has been reloaded?Of course, it would be simpler to do it running the function automatically once the page loads, then just reloading if the test comes back that the function has been run already, but that wouldn't work for the first time you visit the page - it would start running straight away, whereas I want it to wait for that first click. Here's the page [URL] I'm working on, if you want to have a look.
I was putting some javascript in a form and doing my usual testing and swearing when the javascript did not run without an error message of any type and reverting the code back until it did run and adding code til it didn't.
Then it hit me - isn't there a better way - doesn't someone have a program or utility that will help debug Javascript ???
As I'm doing Javascript it is much harder to decode than the 30 year-old Fortran programs - they typically gave a line number and variable name that was missing.
When I did Basic before Visual Basic, the editor identified errors in real time as we typed. What is available for Javascript?
If I have to test my code on different Netscape versions, can I download and run those versions on the same computer or will it create conflicts? And if I had to test only one version which one should it be - which one has the most common elements to all the versions?
View 3 Replies View RelatedI am trying to check if my new window is open and if it is change the url.
This works until I use the x in the corner to close the window. At that
point i get an error when i try to open the window again. I believe that it
is because newWindow is still active. How do I close newWindow when it is
unloaded or closed by the x. If this is truely the problem.
function openWindow()
{
if (typeof (newWindow) == "undefined" || newWindow.open == false)
{
newWindow = window.open("http://www.yahoo.com","","width=400,height=400");
newWindow.focus();
return false;
}
else
{
newWindow.location.href = "http://www.msn.com"
}}
Here's my solution, seems a little redundant though.
function openWindow()
{
if (typeof (newWindow) == "undefined" || newWindow.open == false)
{
newWindow = window.open("http://www.yahoo.com","","width=400,height=400");
newWindow.focus();
return false;
}
else
{
newWindow.close()
newWindow = window.open("http://www.msn.com/","","width=400,height=400");
newWindow.focus();
return false;
}}
In this piece of code (common to a number of pages) I want to set focus to a second input field if there is one.
[Code]...
determine what the first letter of a selector is? For example, if the very first letter of a paragraph is a quote (or a ‘ , or a “ , etc) I would like to apply a negative text- indent to the found paragraph so as to replicate "hanging quotes" that are commonplace in the print world. The code I've come up with is: $("p:contains(“), h1:contains(“), h2:contains(“)").css({'text- indent':'-0.3em'}); but this grabs any p or h1 or h2 that *contains* an opening curly quote; not what I'm looking for. I need it to select paragraphs that *start* with the opening curly quote. Incidentally, I could not get this to work when I was searching for $ ("p:contains(“)... but it worked when I entered an actual opening curly quote in the search (as above top). I tried both single and double escapes too.
View 3 Replies View RelatedjQuery - slideToggle, testing if up or down
I have a simple slideToggle that slides a sub menu up and down
Code:
$('a#btn-portfolio').click(function(){
$('#sub_menu').slideToggle('slow');
});
[Code]....
does anyone know how I can test, in javascript, which of several buttons was pressed when submitting a form? Currently, I use the onSubmit event handler to call a form validator function, and it is in that function which I would like to test which submit button was pressed. Anyone know?
View 3 Replies View RelatedIs there any way to test if there is overflow in a text area (i.e. a scrollbar is displayed)? This is a read only field so I could change the textarea to a div if necessary.
View 1 Replies View RelatedIs there any way to detect through Javascript whether a browser supports a particular property of CSS? I am experimenting around with CSS3 and I would like to be able to detect whether the browser understands what to do with a particular setting, as in "elementRef.style.newCSS3_property = '3px' " I have heard, although I do not know if its true, that there is some way to access whether the browser knows what such a declaration means.
Does anyone out there know how to do this?
I have the following code:
Code:
<script language="javascript">
<!--
// Max number of items to show/hide
[Code].....
Which is designed to hide all but one of a group of DIVs with consecutive IDs in the form "listings_stations_<number>". The problem is, I won't know how many of these DIVS there will be. I know a maximum possible number though.
The script as-is works, but obviously throws up errors trying to get handles to non-existent elements/objects. How can I check an element exists before getting and setting style properties for it? I'd like a solution that works for all three browser-types the script currently works with.
I'm trying to check for this bug with the following script and it
*seems* to work. In IE it reports "bubbling" and in Firefox "not
bubbling" but I really have no direct way to confirm the Firefox
results until the bubbling bug is fixed.
Basically the test script assigns an onscroll event handler to a
textarea and then scrolls the textarea down then back up, checking to
see if a the event handler works (assigns the "bubbling" variable a
"true").
I had to code things with a few settimeouts otherwise Firefox, unlike
IE, wouldn't display the down then back up scrolling of the textarea.
Which may have been a problem.
Lacking a "debugged" Firefox browser, is there some further (indirect?)
tests and/or rational that would support or discredit this script as a
valid onscroll event check? ....
Is there any way to use an if statement to see an element is currently hidden or displayed?like:
var child1 = $('#divImgH1');
if (child1.IsVisible())
{ do something;}
So firstly this is likely not in the right place at all, as it's a bit OT but I figured it's the best place to ask. I have to document 4 different tests to my code; what structure should I take when doing this?
I was thinking:
* State the aim of the test
* State the inputs, and what I believe the output should be.
* State the actual output, and whether this positively or negatively affect my code.
I'm working on a script that calls my php file, checks the db and returns text. If the returned text="bad" then i want the var "bad" to be set to 1. at the bottom of my script, if anything has tripped bad=1 then it returns false and the form doesn't submit...everything works great except for this one piece so i was wondering if you guys might offer me some insight
[Code]...
Does anyone know how you can test if an applet's method exists before you try and call it?
for example, if you don't have a JRE installed on your computer and try and access an applet method it shoots out a javascript error at you. I want to be able to test if the applet is operational basically before I try and use any of its methods.
I am trying to check for an element(theLink), in a page, but in my code below, testing for null is raising an error. I have tried both codes below and both give the same error, that this.iFrame.contentDocument.getElementById('theLink').childNodes[0].href is null.
If the link does exisit this works fine.
Code:
Code:
I have a form with several types of checkboxes, and I'm trying to check all but one of them to determine if any of those have been checked. I do not want to check 'all', but I want to see if any of the 'check_' or 'check2_' checkboxes have been checked. There are a variable number of checkboxes, so this is just an example with two of each. Set 1 and Set 2 will always have the same number of checkboxes as each other, though.
[Code]...