jQuery pass data from click event to doubleclick - javascript

Since I've tried and not succeeded many times I figure it's time to ask. I would like have several elements on the screen on which the user can click. Once the user decides to double click somewhere on the body I would like to console.log the text elements of the array.
This isn't nearly as intuitive as I thought it was going to be. The following example isn't all that practical, just curious why I can't get it to work.
EDIT: I would like to NOT use a global variable.
Fiddle can be found here

You just need to alter the scope of the array textArray so that your function ferryArray() can access it and loop over.
Here is the working fiddle.

Related

Update HTML text content in a while loop

I'm having a problem that seems very simple, but still I don't know how to solve it.
So, I have this tag in my HTML file:
<p id="best-individual-text" style="display: inline-block"></p>
For context, I'm building a simple genetic algorithm to evolve a population of individuals (strings) in order to reach a target phrase. In my .js file, I have a loop that creates the new population and finds the best individual of that population, and the loop only stops when one of the individuals is identical to the target phrase.
What I want to do is to update the best-individual-text text content with the string of the best individual in each generation. Since the while loop creates a new population in each iteration, there's going to be a new best individual at every iteration.
Inside this while loop, I have the following line of code:
document.getElementById("best-individual-text").textContent = getBestIndividual();
Note: getBestIndividual() returns a string
And here lies my problem: the HTML doesn't get updated. The tag remains blank until the loop stops, and only after that the tag is filled with the last best individual.
It works fine if I try this manually, that is, outside of the while loop. My only guess is that the while loop runs too fast for the HTML to be updated. Still, I think I've seen people update the HTML in a while loop, so I really don't understand the reason it is now working.
Also, I've tried making a setInterval instead of a while loop, but it still doesn't work. Even if it did work, it is not of my interest to have any sort of interval for each loop.
What could the problem be, and how can it be fixed?
Thank you in advance!
Here's the github in case anyone needs to see more of the code: https://github.com/pedroheck/genetic-algorithms/tree/main/Word%20Race
I tried out your code, and in the cases I hit where you enter some text, click "Submit", and nothing happens, what is actually happening is that your algorithm is in some sort of infinite, or long-running loop, and it never hits the point where you try to modify the HTML.
You can tell this by simply setting a breakpoint at the line that tries to modify the HTML, and notice that it simply doesn't get hit. Another clue is that the window becomes unresponsive.
My recommendation would be to look closer at your algorithm and try to set some limits. console.log statements will be your friend, because they'll help you see what parts of the code are running the most.

How would I click a link that changes dynamically, with no id, but is always in the first cell of tbody?

The link I want is always here first link of <tbody>. But maybe called something different.
If you could maybe explain what the code is doing that would be cool too. The simpler the code the better because I have to wrap it into an Applescript.
You could accomplish this with the following code based on your comments in your question and my answer.
document.querySelector('.odd').querySelector('a').click();
To provide a more permanent solution, more of the pages layout will need to be exposed.
What this does
document.querySelector and document.querySelectorAll queries the element nodes on the DOM. The first option will pull the first instance it finds for the search value, while the second will return all in a nodelist.
Running the click() function will simulate a click on that element you have queried for.
Knowing this, you can now take this example and potentially make a working script for yourself.
Let me know if this helps you out. Since you state the layout always stays the same, this should get you started.
This seems like an excellent situation to use find() since you'll always know the parent. Alternately adding a class to the anchor element would let you address it without crawling around the DOM.
$('.odd').find('a');

jQuery create a callback thats not a callback?

Alright lets see if I can describe this.
I have a handful of functionality that was created sometime ago, and works swimmingly. However there is a new desired spec, so without having to rewrite the code base in a matter of speaking, and without having to double up on code to pull the same effect off I am trying to figure out how I can go about making something jump back higher in the code within the same function to repeat the run of the function rather then doing the same code again below.
What I have is a click based triggers ie:
$('.selector').click(function(){});
In this function is about 30 lines of functionality to create a new element and populate it accordingly. However unfortunately in that same bit of functionality there is conditions to wether it should or not.*The previous requirement was when the element it creates is open and populated just throw an alert() saying essentially wrap up what your doing, and then go on to the next. *Now the new requirement is just close that and open a new element. Which I've gotten to close out the existing, and do everything I want it to do, except the population of the new element which is above where the condition is currently. Knowing there is no "go to" type of logic in javascript (or last I knew). the only thing I can think of is taking the same code from above and putting it in the condition as well, doubling up on the code and having litterally 2 copies of the same bit. I want to avoid that, but cant think of a way to do it. So here I am looking for ideas
Knowing there is no "go to" type of logic in javascript (or last I
knew). the only thing I can think of is taking the same code from
above and putting it in the condition as well, doubling up on the code
and having litterally 2 copies of the same bit. I want to avoid that,
but cant think of a way to do it. So here I am looking for ideas
Why don't you just pull this piece of code out into a function? You can run the function if the conditional is true in the original instance, and run it all the time in your callback? This is fairly minimal refactoring, just move the code out of the logic into a separate function, keeping it as is and maybe making some of the referenced variables into parameters.
So something like this if you want to run all the actions regardless of the conditional statements:
...
if(condition){
actionA();
}
if(condition2){
actionB();
}
...
$('.selector').click(function(){
actionA();
actionB();
});
You're familiar with that pattern, right?
var aCallback = function(){........};
$('.selector').click(aCallback);

JavaScript Jquery dynamic OOP call

Ok, not sure if I am going to give myself any justice in trying to describe this. But..
I have an some code OOP style where you would call it like: objectName.functionName(properties, values, etc);
and as of the moment I seem to have reached a road block. I am multiple functions that do various things, but I have this one function that I want to act as a "Refresh" function for the many. Which would work if it was a single function I wanted to refresh from time to time. Overall i don't wish to reinvent the wheel either.
So my current click event looks like a call to the above. Where in the link I am using I have my hidden parameters per the needs of the functions which this works, fine But heres the catch 22 I recently ran into a need to have multiple refreshes on the same page for various functions. So I am wondering is there a way I can pass functionName as a variable to the object so it would work like
var funcNamVar = functionName;
objectName.[funcNamVar](properties, values, etc);
note the brackets [ and ] are just for representation of the concept I know they shouldnt be there
Sure. You can actually just do
objectName[funcNamVar](properties, values, etc);

jquery $.getJSON repeats X times

I'm having trouble recreating the issue in jsbin without giving away project-specific details (I'm using JSON from an API), but I'm running into an issue that I can't seem to get around, and would really appreciate any help or insight.
I start with the following markup:
I have a blank unordered list.
<ul id="results-list">
<!-- it is blank for now, and will be populated via jQuery -->
</ul>
And also an input.
When that input has been submitted, I run some code to populate #results-list with data, based on a JSON response. All's well. In that population of the data, I embed links that go nowhere, to make it like a sidebar navigation (user clicks on a link, and the main content area's content changes accordingly). This works fine the first time around.
Then, I've got an anonymous function running inside of .live() for clicking on those links in #results-list.
$("#results-list a").live('click', function(){
// populate the main content area with the correct information.
});
Okay, so that works just perfectly the first time around. Once the user changes what's in the input, and resubmits the form, all of the items in the main content area change accordingly, but there are two of them. If they resubmit the form again, there are three. And so on.
So, the main content stuff is duplicated X times, with X being the number of times the form has been submitted.
I realize this is a somewhat vague question, but I wanted to see if anyone had any pointers as to what may be going on? This is all happening within a normal $.getJSON method call.
Any ideas?
If you call the live function after each post, jQuery will just keep adding event handlers to the DOM, so the handler will get called multiple times. To get round this, either just call the live function once, or if you have to set up event handlers after each post use unbind and then a bind function (i.e. bind or something more specific like click).

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