Statement Faster Than The Ternary Operator?
May 20, 2009I'd like to know which is faster or have a better performance between :
Code JavaScript:
if (flag) {
var v = "something";
} else {
var v = "else";
[Code]...
ADVERTISEMENT
Mac IE Ternary Operator?
Jul 23, 2005I don't actually have a mac with which to test this, but I'm informed
by a colleague that one of my scripts has failed in IE on the Mac;
endless twiddling seems to point to the ternary operator as culprit.
I asked him to check that javascript:alert(true?"Yes":"No"); gave an
alert when pasted into the address bar and he's reported that it does
not.
javascript:alert("someString"); works quite happily.
Can anyone confirm this bug or help narrow it to a single version? It
seems a fairly large bug to have gone so under-reported, gooooogling
for "mac ie ternary operator" doesn't return anything helpful.
Ternary Operator Syntax And Case Condition
Aug 22, 2010It's well know that the ternary operator syntax is something like so:
Code:
(test) ? true doThis : false doThat
Suppose that in case condition is false we want do nothing. How to code "do nothing"? May I let it blank or there are an appropriate syntax?
NOT IN / IN Operator
Aug 6, 2007Just wonder whether jaavscript can perform the NOT IN / IN as below:
if form.mytext.value NOT IN ("MYTEXT") {
alert("Mytext");
}
I did try, but not alert is displayed ad not error shown as well.
New Operator As A Method
Aug 13, 2005Is there any way to call the new operator as a method (function)? The
reason is that I've got IE as a COM object (Imagine I've brought up IE
using VB) and it's easy to call every method of any DOM element
(including window). But if I want to create a new object, then it's
more complicated. Of course I could always execute js code (using
window.execScript) which will create the object and save it as a
variable on the window object and then pick it up from the COM creator,
but really...
Consider the following page snippet which nicely adds an option to the
empty select element. Of course, I could use the W3C createElement,
addChild, muckWithDOM approach to avoid the execScript, but both of
these are going to add huge amounts of time and substantial complexity
to an otherwise one liner:
<form method=pos action=''>
<select name=sel id=sel></select>
<script type='text/javascript'>
var sel=document.getElementById('sel');
sel.options[0] = new window.Option("foo", "bar");
</script>
</form>
Can't I do something like
window.Option.newInstance("foo", "bar")
in place of the
new window.Option("foo", "bar") ?
How To Increment Without A ++ Operator?
Jul 30, 2002I have a for loop and would like to increment a variable for (let's say) 2 instead of one (++). How can I do that?
I have tried for instance x + 2 instead of x++ but when I try it in IE an error saying that a script is making IE to run slowly and then nothing happens. So how to do this?
Special Operator About Function
Dec 14, 2006<script>
var sd=function(){
return{
f1:function(){
alert('f1');
},
f2:function(){
alert('f2');
}
}
}();
sd.f2();
</script>
when execute sd.f2();it will alert f1,who can tell me why?
If Statement Returning False On A True Statement?
Apr 4, 2011my webstie allows users to change the color of the background, so to keep the text readable I have it changing as well.the color picker I am using has text boxes with rgb values 0-255 for each.I am trying to get one bit of text to alternate between red and blue with the conditions
Code:
if(blue>green && blue>red)
{
[code]....
Eval And Mutireplace, Which Is Faster?
Dec 26, 2006I want to implement the template for a object output. I have two methods as follow:
View 1 Replies View RelatedJQuery :: Website Faster On Ie7 Than On Ie8?
May 4, 2010I have a problem on my current project. Animations are very slow on IE8 but when I turn the compatibility mode on, it become very fast.
FF, Safari and Chrome run it fast too. I don't understand how my site can be slower on IE8 than on IE7 O_o
Which Is Faster Javascript Or Actionscript
Dec 7, 2007I'm trying to select client side language to learn. For some time i wanted to learn Javascript, but when i tried writing first script which was so simple, i saw that it has so much problems. I thought of flash, and read few tutorials online. It's pretty simple but powerful language.
I know that probably worst feature of flash is that it's not included by default in your browser, but since youtube and other video sharing services i think that flash players on browsers are drastically more installed then before, and that almost everybody has it.
Now, i'm planning to create chat for my personal website, and i saw Ajax chats, and Flash chats. Since i don't have experience with any of the scripts i'm wondering which code is faster Properly written Javascript, or Actionscript.
Also, which of these languages are better for me to learn. I'm learning web programming as hobby so don't use money as argument. But which of those two can be used for creating fun, dynamic, fast and safe programs easily
'in' Operator And Feature Detection Technique...
Feb 9, 2006We all know that feature detection technique works from very beggining
of user-agents supporting JavaScript. We can alway check if eg.
document has a write property or smth else:
if(document.write) {
}
We could do that for all of objects, so i have been surprised when i
found 'in' operator, which for above example would be used like this:
if("write" in document) {
}
So i have questioned myself what for ? I can always do:
if(document["write"]) {
}
or even
var prop = [...];
if(document[prop]) {
}
which is supported better then 'in' operator ('in' is supported since
W. IE 5.5 and NN 6 - around 2000 year). I can only guess that 'in' was
provided in W. IE 5.5 only for convenience... but that is my guess and
someone more knowlegable could write here some more opinions on this
operator...
Pass Operator As Variable Without Eval?
Mar 10, 2010How you might achieve the following without using eval()? I've come up a bit short:
function addOrSubtract(operator) {
var a = 10;
var b = 5;
var answer = eval(a + operator + b);
alert(answer);
}
addOrSubtract('+') // alerts 15
addOrSubtract('-') // alerts 5
Missing Name After Operator Delete Keyword
Nov 13, 2010this.delete = function(obj){
..
Is that it ? I can't have delete ? Or can this be written in some other way, including delete ?
Mozilla Faster Than Internet Explorer
Jul 23, 2005I've developed a calendar program in javascript, and up until now I've
done most of my testing using Mozilla and Firefox. Everything works
fine, but when I try to use Internet Explorer my response time is
sometimes 50 times slower than using Mozilla.
I know I haven't given you much to go by, but I'm not looking for an
answer so much as an approach to debugging the problem. For example,
does anyone here know of a good web site which deals with
browser-specific javascript performance issues?
Way To Make My Script Load Faster
Jun 3, 2010How do I make my Script load faster?
Is there Code that will make my Script load faster,
(so that it won't take so long to view)
If so, can someone show me how to incorporate it into my Example Script
Pre-Loading Images So That They Appear On-screen Faster?
Jun 27, 2011I am currently doing a photography site.I would like to do a 'portfolio' page, but would like to pre-load the images so that they appear on-screen faster.Do I need to connect code to <body onload>?
View 22 Replies View RelatedJQuery :: Combine 2 Click Events With Operator ||?
Sep 23, 2011I want to combine two click events to one function.Is there a syntax way like when you click this or you click that do something [code]
View 1 Replies View RelatedAND Operator - Alert Not Shown When Values Selected
Feb 25, 2009I am trying to run some code that will check if the user enters two values from 'depart' and 'arrival' select lists that would make up an invalid journey:
var cdate, ctime, cdepart, carrive, cname;
with(window.document.example) {
cdate = date;
ctime = time;
cdepart = depart;
carrive = arrive;
cname = name;
}
if(trim(cdepart.value) == 'Uptown' && trim(carrive.value) == 'Downtown'){
alert('invalid journey');
cdepart.focus();
return false;
}function trim(str){
return str.replace(/^s+|s+$/g,'');
}
However when I select the values the alert is not shown? I think My syntax is okay, maybe not?
Logical Operator Not Working - How To Make It Work
Jul 14, 2010What kind of logical error am I making? I want the alert(); to execute if both of the variables (cjob and czip) are blank, but the only way I can get it to work is if I replace && with ||.
if(trim(cjob.value) && trim(czip.value) == '')
{
alert('Hello');
}
OnClick - Tracking Clicks - Faster Method?
Sep 12, 2010I built up 2 codes, which do the same cause. but which one would be most efficient? or maybe which one would be best compatible for browsers?
CODE 1 :
- this code allows for me to use an #id
CODE 2
- using the REL
Modulus Operator Is Not Working If Give Number More Than 24 Digits
Dec 7, 2009If number is more than 24 digits, modulus operator is not giving correct output [code]...
Default Operator ( || ) Doesn't Work With Empty Array?
Aug 13, 2010anotherVar should be -1 if there are no matches, but it doesn't seem to work var string = "abadafa"; var matches = string.match(/a/gi); //doesn't work with /z/ for example
var anotherVar = matches.length || -1; The default operator should return the second value if the first is null or false, and according to try { alert(matches.length);
}
catch (e){
alert(e); //alerts null
} it's null.
fyi: http://helephant.com/2008/12/javascript-null-or-default-operator/
JQuery :: Fade In To Appear Faster And Alert To Appear After One Hour Elapses?
Aug 11, 2010works ok, but my alert box comes in really slowly, then bounces. I want it to appear faster and to also appear after exactly one hour. I don't think that works right either. What do I need to change in order to do this?
[Code]...
JQuery :: Use SlideToggle To Set A Faster Speed For Hiding Than For Showing?
Jan 18, 2010Is it possible using slideToggle to set a faster speed for hiding than for showing?
View 4 Replies View RelatedLoad Embedded YouTube Videos Faster On Website?
Jan 10, 2011I'm writing a blog post that uses multiple videos from YouTube and Yahoo Video, but I'm not happy with how long it takes the page to render. Apart from using an ajax-y method to load the videos, are there any tricks that would make the page load quicker with multiple videos from different sources?
View 6 Replies View Related