Return An Object From A String
May 19, 2006
reSplit is used to return an object from a string of name/value pairs.
pass reSplit()your own delimeters or use the defaults.
String.prototype.reSplit= function(d1,d2){
if(!d1) d1= /s*;s*/
if(!d2) d2= /s*=/;
var Obj= new Object, tem;
var A= this.split(d1);
var L= A.length;
for(var i= 0; i< L; i++){
if(!A[i]) continue;
tem= A[i].splat(d2);
Obj[tem[0]]=tem[1];
}
return Obj;
};
String.prototype.splat= function(delim){
var ax,L;
var d= this.match(delim);
if(!d) return this;
else{
ax= d.index;
L= d[0].length;
return [this.substring(0,ax), this.substring(ax+L), d[0]];
}
};
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Dec 5, 2005
<disclaimer>js newbie</disclaimer>
My page has a form comprised of several radio buttons. I want to poll the
buttons to determine which button was selected and convert its value to a
string. I then want to use the string on the same page. Code:
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Oct 21, 2009
I am building a string inside a variable prior to printing it on screen as follows :
myclock += hours+':'+minutes; where "hours" and "minutes" are variables initialised elsewhere. How can I add a carriage return or new line character to the end of this line, so that anything else cocatenated to this variable is displayed on the next line.
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Sep 18, 2011
I'm working on a function that checks the css href in an included html file and if it is incorrect it adjusts it. my problem is in this piece of code
Code:
hrefrege = /href="[^ ]+"/i;
originalHref = m[0].match(hrefrege);
originalHrefArray = originalHref.split("/");
[Code]....
Why doesn't it recognise it and how do i fix my problem?
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Oct 29, 2009
I'm trying to return all the permutations of a given string, so I wrote the following recursive function:
The problem is, I'm not getting all the permutations, and I don't know why.
For example, if string="bindle", the output I get is:
And then the function stops.
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Dec 8, 2009
I need to return a string of JS from my php file. In my ajax.php file these are the last lines ($js is a string of js generated dynamically, it works as its calling a function I'm using at the load of the page): $js = getData($day,$the_vote);
[Code]...
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Apr 1, 2010
trying to write a function where i can pass an array and string and replace the value in return. i.e
var inputStr = "010203040506070809111213141516171819";
i want to pass this value in function and replace each number (number ranges are 01-09 and 11-19 only) i.e if i pass 01 want to replace that with A,02 with B etc.. so problem is i would pass input string and pass back as string after replacing those values by running through the below function. wrote the following,cant seem to split my inputStr into 01 02 etc tried splice and split no luck :
[Code]....
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Mar 4, 2010
alert($(
"ul li").get(0));
Thisalert show this, literally: [object] This [object] will not accept any DOM methods like addClass, etc
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May 7, 2009
I have three buttons set up using onClick. These buttons are used to display the differing results from an object. They work except the results are displayed on a new page. Ive been trying to get them to display the results in the same page using a div. The problem is I cant get them to work properly i.e the result wont display at all in the div area.
Here is my code
Code:
<body>
<input type="button" value="emp1" onClick="document.write(ger.getFullName())">
<input type="submit" value="emp2" onClick="document.write(tom.getFullName())">
<input type="submit" value="emp3" onClick="document.write(mar.getFullName())">
[code]....
How do i get the results to display in the div?
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Aug 20, 2010
i've seen this code at work which i do not get.
var Key = {
'Number1': 49, 'Number2': 50, 'Number3': 51, 'Number4': 52, 'Number5': 53, 'Number6': 54, 'Number7': 55,
'Number8': 56, 'Number9': 57, 'Number0': 48,
};
I need to return a var element from Key based what a var containing a string contains e.g
var string = "1"; an example
return Key.Number1
How would I do this using a for loop and not having multiple if statements
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Jan 10, 2011
I'm writing a function that substantially load a given image making a fadeout/faidin waiting 'till the complete load. The function is named "loadImage" and I would like use it in the following way:
$('#image img').fadeOut().loadImage(src).attr("src",src).fadeIn();
In order to make the image disappear, load... change the attribute "src" of the image and then re-appear. The code for the function is:
(function($) {
$.fn.loadImage = function(src) {
var img = new Image();
$(img).attr('src', src).load(function() {
return this;
});
}})(jQuery);
But when I run it I get the following error:
$("#image img").fadeOut().loadImage(src) is undefined
I think that the function don't return a "valid" object to make it chainable, isn't it?
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Aug 24, 2010
I am confused about what the return keyword is actually returning when returning an object, a primitive, or a function. My confusion is compounded by the fact that I'm not sure if a function is an object or not. According to the book JavaScript Programmer Reference it is: "All functions in JavaScript are first class objects , meaning they can be passed around like any other object reference. In fact, regardless of how they are created, functions are instances of a global object named (aptly) Function."
However, someone else states that a function is not an object. An object is a set of primitives and references. A function is executable code. Functions become objects through the use of the new operator. Yet, in the book I mentioned, it says you don't need the new keyword to execute the function as an object, as it already inherits from the object Function when the function keyword is used:
function functionName([argname1 [, ...[, argnameN]]])
{
statements;
}
So there's one source of contradiction. Now the bigger issue is what is going on when the return keyword is used. Notice the Validation() function returns an object as its last expression. This technique is common, where you return an object which contains functions in form of object notation. I believe this is done so that we create a closure so that when the intepreter exits the Validation() method, since we created a closure by returning an object, which contains the inner functions addRule and getRule, the local variables of Validation() are not destroyed, given that we can reference them through the two inner functions that make use of the local variables of the outer function. So when we use the return keyword on an object literal, and then exit the function, when we call one of the inner functions as we do later:
[Code]....
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Jun 7, 2011
My coding returns the json array and the object has special characters which i am not able to retrieve the data in my coding.
Example:
{
"No.":"3",
"sign":"positive",
"nr_old":"",
[Code]....
In the above example, i am not able to retrieve "No." and "referring domain or url" and "avg. pv/ v"
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Feb 8, 2011
I am looping through an array of objects and creating an <li> element for each one and appending to a <ul> in the DOM. Works fine.During the looping I am also attached a 'details' object as data for the list element:$(thisListItem).data('details',{<obj>});Later, I am using the selector:$('ul#images_list li')to attach an on click function for each <li> element.In the click handler I am reading the data 'details' object for the <li> element:dataDetails = $.data(lotImage,'details');and, using the jAlerts plugin, I am opening a jPrompt which asks for the user to enter a price.
The jPrompt call includes a callback which receives the entered value as a parameter. The callback uses the value to 'post' the updated value, via $.ajax, to a server side unction.After OK is clicked in the jPrompt popup, in Firebug, I get an error that the dataDetails is undefined and it lists the line number in the click handler where I originally read the data object from the <li> element.I don't really understand why it should care after the click event has fired and the jPrompt callback has been invoked
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Jul 23, 2005
I want to use the same function for a number of fields.
<input name="taxi1" type="text" id="taxi1" size="8"
(this,1)">
function myFunction(val, itm) {
}
What can I do to get the name of the text field "taxi1"? If I try to use
[val], I'm told it is an object. I'm looking for the string "taxi1".
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Nov 24, 2006
how would I change this to an object that I can add onto a table?
And how would I add it to the table? Code:
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Jun 3, 2010
JavaScript Challenge Play--Random Color (The English Version of JavaScript)
Write a function to return a string that can represents a color.
Requirements:
1. The color is random. The color string can be similar to "cf9c63", also similar to "rgb (211,100, 180)".
2. Code should be concise, clear, easy to read, good performance, and better than my solution.
And go to [url] to see more!
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Oct 19, 2006
is there a way to get the name of the calling object of a method?
function MyFunction()
{
this.SayCallersName = _SayCallersName;
}
function _SayCallersName()
{
alert("how to get 'oTest' as output here?");
}
var oTest = new MyFunction();
oTest.SayCallersName();
What I want as an output is the name of the object I have created
without passing it to the constructor.
So I do not want oTest = new MyFunction("oTest") or something like
that. Is this possible in JScript?
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Feb 27, 2010
What I'm trying to do, I think, is to use elements of an array as a part of an object. Here's a lil' code snippet:
Code:
I'm trying to insert each of the elements of the katMusik-array into the checked-line, thus checking the checkboxes with those names. However, it doesn't seem to work.
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Jun 5, 2011
In a MySQL database I have the following entry: "Fruits & Vegetables". I retrieve this to display on a webpage using PHP, convert to JSON, pass to client, process using JavaScript.
The PHP code that is passed to the client is:
Code:
$z = rawurlencode(json_encode($reqVar));
echo $z;
where $reqVar is the array of results queried from database, including one that is "Fruits & Vegetables".
When it's passed to client using AJAX, the JavaScript to process the string (decode it and then convert from JSON string to object using Prototype framework) is.
Code:
var response = decodeURIComponent(transport.responseText)
var respObj = response.evalJSON(true);
I can then display it in page. But when I pass it back to the PHP script using AJAX using the exact same process in reverse, at some point & is converted to & and if I re-enter it into the database it looks like "Fruits & Vegetables". How can i prevent this conversion? Does the order in which I convert to and from JSON and encode/decode need to be changed?
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Jul 21, 2004
I have this string: tr= "<tr><td>test</td></tr>";
And I need to convert this string to DOM object. Like this:
var tr= document.createElement("tr");
But with the content of tr element.
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Jul 23, 2005
Hopefully this can be done and it is easy...
I have some object like
var a = new Object();
a.name = "Title";
a.vars = new Array(6);
a.vars[0] = "4";
a.vars[1] = "22";
etc...
for about 18 objects.
If I have a string like
var str = "a";
how can I reference object data, like str.vars[0]?
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Jun 26, 2011
I used below code to pass my xml sting.
Xml_string = <?xml version="1.0" encoding="UTF-8"?><layout>
<elements>
<i type="image" id="a18888201" [code].....
Now I wont to edit this xml_file and again convert this xml object to in string . It seems I can change the values. But I don’t know how to convert this (Xml_file) in to string.
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Mar 25, 2006
Is there a way to do the following?
<script language="javascript" type="text/javascript">
function newfunction(objectName) {
// how can I create a new obect called whatever is contained in the objectName string?
}
//create a new object called myObject
newFunction("myObject");
myObject.getAttribute("objectAttribute")
</script>
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Dec 10, 2009
I have a String formated in such as the javascript format
May I know is it posible to directly convert to var array?
Example:
But it look not work for me...
How can I do that? ( without using split function example var data = respond.split(","); )
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Dec 5, 2010
I have searched the web and this forum for the answer to this but am unable to find a reasonable choice. So, this is the problem I am facing.
Code:
var str = "document.frames[0].document.frames[0]";
var str 1 = "document.frames[6]";
//Loop Starts
{
var obj1 = str + str1;
[Code]...
I know the easiest way to do this is to use eval() and it most definitely does work. The problem is that I have to use eval() inside a loop to check whether the reference is null and from what I hear, that is one of the most inefficient ways to code. I have searched for alternatives like using, var myFunc = new Function(string) and then calling myFunc(). But this does not work in my case. I cannot find any other alternative in this case. I guess one can say eval() is the only choice here but I am not too sure.
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