I need to create a code that takes in a function f and a variable x and gives me f(f(x)). For example, if f(x)=2*x and x=3, then f(f(x))=12.
I've tried to look at this from two angles: creating an extra variable to define the function within the function and reusing f on itself. But I can't use either properly.
How can I get my main function to accept a function as its first parameter [function(2*x, 3)]? Is that even possible? I could specify the function f within the twoTimes function, but the point is for f to be a changeable parameter.
I had come up with, but it definitely doesn't work. How should I approach it?
var twoTimes = function(f,x) {
f = function(x) {};
var r = f(x);
return f(r);
};
twoTimes(2*x, 3)
I am having a strange problem with a javascript function that does not return the value but returns the code inside the function. My best guess is that I am incorrectly calling the function hasLandedOn()and jquery is interpeting it. Why is this happening? I highlighted the parts in red.-Tom ReeseThe following is returned NOT the variable imageName.
function hasLandedOn(){ var selectorLoc = $("#selector").offset(); var imageName = "";
I have what I think is a strange issue but others may see something I am missing.I am using AJAX functionality to process a php script on a server and then place the output of the script into a div element.Here is the code snippet
Code: function doWork13(typeCode,colorBlockName,objectCategory,imgID){ httpObject = getHTTPObject(); if (httpObject != null) {[code]....
This code shown here works perfectly BUT....I do not want the alert message to be there. When I remove that line of code the script fails to function. There is no error just nothing happens.The function is to replace one image with another and the variable in question is simply the ID tag of the particular image being modified.As I said it works with the alert but does not with out, could it be a timing issue in that the alert gives enough time for the if statement in the setOutput13 function become TRUE
In one variable i have some data ex: var data = document.getElementById("imageId").value; I want to pass this data to another function inside another function ex: var button1 = '<img src="images/Remove-button.gif" width="70" height="15" onclick="removeVerifyImageRow(this),saveLibData('+data+')"/>';
while running the application i am getting an error incase if the data is string ex:if data is 'image1' i am getting an error, but with number there is no problem ex: if data is '1122'.
for (var i = 0; i < BS_crm['activityTypes'].length; i++) { var clickFunc = function(){ activityList.showForm( -1, {blockType:[""+BS_crm['activityTypes'][i]['id'], "0"]} ); }; var type = {
[Code]....
Now, basically what I am doing here is running through one array to create an array of objects, that will be used to create links that will use whatever onClick function I pass it. The problem is that on the second line I need the BS_crm['activityTypes'][i]['id'] to be a value, not a reference. If that line was simply changed to:
var clickFunc = function(){ activityList.showForm( -1, {blockType:["3", "0"]} ); };
In one variable i have some data ex: var data = document.getElementById("imageId").value; I want to pass this data to another function inside another function ex:
var button1 = '<img src="images/Remove-button.gif" width="70" height="15" onclick="removeVerifyImageRow(this),saveLibData('+data+')"/>';
while running the application i am getting an error incase if the data is string ex:if data is 'image1' i am getting an error, but with number there is no problem ex: if data is '1122'.
Can someone tell me where the problem here is? I can't get the "squared()" function to work properly...it supposed to put the squared value into the iframe area....
I have my events and syntax in the immediate script and they were working fine. But Im trying to move it all into the Script tags and call on them by using the function ID but cant seem to figure it out. here's what I got:
<html> <body> <script type="text/javascript"> function txtAmenity()
I am having a problem where the sorting function I have designed is supposed to sort an array of records into descending order in terms of each record's "score" value, I would expect the below code to alert 2,1,0 in that order but it's as if the code didn't even sort it.
var g=[{score:0,index:0},{score:2,index:1},{score:1,index:2}] function sortScores(scoreRecs){ var swapped;
function displayTimes() { document.write("8:30-9:50<br>9:55-11:15<br>11:15-12:00<br>12:00-1:20<br>1:25-2:43"); }
It's not displaying. How do I call the function properly? I tried reading about onload but it only applies to <body> and <img> and I want it in a specific area of the page. I can put the script on the same page and then call the function later, but I want to know if it's not possible doing the above properly.
Looking at the sample code below, if you click the same link over and over, I get the desired result / animation of the revealed div. If however you click 'link 2' then any link except 'link 2' the animation is different. What do I need to change in my logic to always get the desired result despite which link was clicked?
I'm having an issue with Firefox and the innerHTML code. My index file has the following html body code in it: Code: <div id="testBox" style="text-align: center; color:white;"> test text </div>
Then, in a separate html document loaded through an iframe, I have the following code that works great in IE but not in Firefox: Code: <SCRIPT type="text/javascript"> function ChangeML(){ parent.testBox.innerHTML ='text has been changed'; }; </script>
The function ChangeML is called on a click event using MooTools, but I figured that part isn't what's causing the problems because everything else works fine. No error seems to be reported ... it just skips right over this piece of code.
I have this code and when you click on the first set of them (a specific one) it copies it and then when you click on one of the other ones it pastes it but its not working properly. (If you need to you can put an other image in there)
<button onClick="return popup('<span onClick='selectShape(1, 1, 1)'>test<span>');" tabindex=Ɖ' onFocus="setFocusColor(0,3)">....</button> This will work perfectly, but as soon as I need to pass Strings inside the selectShape function, I get stuck.
So the question is, how can I create the following and have it working
i am using popupwindow.document.write(html_text);all the html of the pop-up goes into html_text.how can i build a function inside the html_text that can be called within the popup window?
In my code a JavaScript function received value from html hyperlink. Value passing successfully, inside product function document.write(a) printing value 5. But how can i print value of "a" inside product function by php. My code is here....
LiveSearch.prototype.initialize = function() { $("#thebutton").mousedown(function() { //when we click the button alert(this.theglobal); }); }
$(document).ready(function() { var objSearch = new LiveSearch("globalvalue"); }); </script>
On page load I create a new LiveSearch instance and it assigns theGlobal = "globalvalue" and proceeds to initialize(); At this point Im using JQuery to setup an onmousedown event on a button on my page with id="thebutton". When I click the button the alert comes back with 'undefined'. How can I get direct access to my theglobal variable? Code:
I think I've had JavaScript variable scope figured out, can you please see if I've got it correctly?
* Variables can be local or global * When a variable is declared outside any function, it is global regardless of whether it's declared with or without "var" * When it is declared inside a function, if declared with "var", it's local, if not, it's global * A local variable that is declared inside a function is local to the whole function, regardless of where it is declared, e.g.:
function blah() { for(var i ... ) { var j ... }}
i and j will both be visible within blah() after their declaration. * the notion of "function" in this context also applies for this kind of construct:
var myHandler = { onClickDo: function() {
in the sense that whatever one declares inside onClickDo with "var" will only be visible inside onClickDo. What else, am I missing anything?
i cant find a way to return a value to a function inside a class...seem that when try to output it(the code with red markup)..its output is undefined..
function AjaxProcess(ElementId,amethod,url,element,callback_function,acontrol,ProcessImage){ this.ElementId=ElementId; this.amethod = amethod;[code].....
I'm making a project which creates tabs with a class. I don't really know how to explain it better but this is how it works:
<a href="#" id="tbs_tabs">Create</a> <script type="text/javascript"> var tbs = new Tabs('tbs_tabs'); tbs.theme = 'classic' tbs.create_option('abc','#'); tbs.create_option('abz','#'); tbs.create_option('abf','#'); tbs.create(); </script>
It first creates the new class and tells it the id, then it creates as many options as you want and creates it.
My problem is with this line: for(i=0;i<this.option_values.length;i++) { li = document.createElement("LI"); li.appendChild(document.createTextNode(this.option_values[i])); addEvent(li,"click",function(){oThis.select_option(i); return false;};
ul.appendChild(li); }
What I was trying to do here is add an event to the LI element that refers to the current tab class but doesn't use the CURRENT i value but the value that was when the event was first created.
For example.. If my i value is currently 2 and I add the function, then I want that when I call the function, the value will still be 2 and not the current i value. What happens now is when I call the function the value is something like 5 or 6.
