I have two dropdowns. When selecting a value from the first (bron) I want to select an entry from the second.
This is fired from the onChange of the first dropdown.
function DepId() {
var bron = document.getElementById("IDUserDepartment");
var doel = document.getElementById("IDDepartment");
var bronwaarde = bron.options[bron.selectedIndex].value;
for ( var i = 0; i < doel.options.length; i++ ) {
var doelwaarde = doel.options[i].value;
if ( doelwaarde == bronwaarde ) {
doel.options[i].selected = true;
return;
}
}
}
But this does not work.
EDIT: for whatever reason, I never get a match. When I hardcode any of the values, and then do: doel.options[hardcodedvalue].selected=true, the option is selected. When I test for window.alert(doelwaarde) inside the loop, this always returns zero.
Any suggestions?
Your code should work, I see nothing wrong with it. If I may make three suggestions:
You might want to use jQuery: simpler code, better multi-browser support.
Use console.log instead of a window alert for debugging purposes: less intrusive, won't interrupt your testing (have a look at the developer console of your browser).
You might want to use English names for your variables, controls, etc. More developers will be able to read it, besides English is often shorter than Dutch ;)
Related
I have written a very simple code on my Google Sheets file. This is the purpose:
Save some cells values from StaticSheet (all the Copyxxx) that need to be copied in DynamicSheet.
Get the value of one specific cell inserted by the user manually.
Enter a While loop useful only to increase an indicator and get the number of the row where I want to copy those values previously saved.
Copy those values on this row but different columns.
The problem is that it seems that most of the time it does not even run the script after I told it to do so.
What is funny is that sometimes it works, super slowly, but it works for like a couple of minutes. And after it stops working again.
Could you please tell me what am I missing here please?
function Copy_Static_on_Dynamic() {
var app = SpreadsheetApp;
var ss = app.openById("xxxxyy--------yyzzzz")
var StaticSheet = ss.getSheetByName("DEAT Price");
var DynamicSheet = ss.getSheetByName("DEAT Price + TEST");
var CopySKU = StaticSheet.getRange(5,1,40);
var CopyPrices = StaticSheet.getRange(5,3,40,4);
var CopyUsage = StaticSheet.getRange(5,8,40);
var Week_1 = StaticSheet.getRange(2,4).getValues();
var i = 1;
Logger.clear();
while(DynamicSheet.getRange(i,3).getValues() != Week_1)
{
Logger.log(i);
i+=1;
}
CopySKU.copyTo(DynamicSheet.getRange(i,4,40));
CopyPrices.copyTo(DynamicSheet.getRange(i,6,40,4));
CopyUsage.copyTo(DynamicSheet.getRange(i,11,40));
}
If you see the "Preparing for Execution" message in the Apps Script editor, you can reload the browser window and run the function again. The program will likely go away.
So I think I have solved it.
As Serge insas was saying I had my script running on the background, I found it out on the "Execution" section, where you can also interrupt them.
After I discover it I kept testing, and I saw that the while loop needed almost 2 seconds to check the condition every time, making the script incredibly long.
So instead of:
while(DynamicSheet.getRange(i,3).getValues() != Week_1)
... I have created a variable declared previously such as:
var WeekLOOP = DynamicSheet.getRange(i,3).getValues();
while(WeekLOOP != Week_1) { --- }
... and now the script needs few milliseconds to run the condition. I don't have enough technical knowledge to say if this was the only issue, but is what apparently solved my problem.
Thanks to all for the support! Will come back if I need any further help :)
As was mentioned by Amit Agarwal, to solve the error message mentioned on the question, refresh the web browser tab.
Regarding the code,
On
var Week_1 = StaticSheet.getRange(2,4).getValues();
and
DynamicSheet.getRange(i,3).getValues()
instead of getValues you should use getValue because your code are referring to single cell cells otherwise you will be getting 2D arrays instead of scalar values.
The use of while should be made very carefully to avoid functions running endlessly. You could add some "safeguard" like the following
var max_iterations = 100 // Edit this
while(DynamicSheet.getRange(i,3).getValue() != Week_1 && i <= max_iterations) {
I was trying to crawl a very old website for a specific tag, I need to get it by it's for= attribute. So I used this piece of code.
var character = document.querySelectorAll("label[for=char_1]");
For some reason it returns an undefined, but I was using this script for a few days now and it worked like a charm. Here's the fun part. Typing that command in browsers console will result in undefined. But typing this alone:
document.querySelectorAll("label[for=char_1]");
Will return a proper NodeList. Why it won't assign to a variable...?
edit: It seems that deleting var and typing character without it will make it work. It's resolved but I would still love to get an answer to "why is this happening"?
edit2:
for (var i = 0; i < 15; i++) {
var character = document.querySelectorAll("label[for=char_" + i +"]");
console.log(character); // this will return [] from the script.
var color = character[0].children[0].style.color;
}
A simple for loop. All I get is Cannot read property 'children' of undefined. But I can type in the very same command document.querySelectorAll... and it will work in the browser and will return NodeList.
I had it working like this in a very hacky script. It worked.
var character1 = document.querySelectorAll("label[for=char_1]");
var characterColor1 = character1[0].children[0].style.color;
edit3:
var character1 = document.querySelectorAll("label[for=char_1]");
var characterColor1 = character1[0].children[0].style.color;
var character2 = document.querySelectorAll("label[for=char_2]");
var characterColor2 = character2[0].children[0].style.color;
// ...
The above code works without a single problem though. I don't think it's DOM not being ready as this code is also run from Greasemonkey script and it works. The only difference is the for loop.
var x = ""; // returns undefined, because it's a var assignment.
var elements = document.querySelectorAll('div');
That's expected behavior when pasted into the console.
edit: It seems that deleting var and typing character without it will make it work. It's resolved
I'm afraid you're creating a global scope variable now. or perhaps characters is an already defined variable in that scope.
Buhah, as I said in edit 3 "the only difference is the for loop". I was so busy trying to find an answer in the DOM-related things that I made the simplest mistake ever done in programming.
See?
char_1
With...
for(var i = 0...)
0! And I was testing char_1 in the browser instead of char_0. Which - truly - returns [] instead of something useful. Time to go on a holiday break I guess, my brain seems to be there already. :)
Well my short and easy to explain explanation can be this. I have 2 arrays, FilterList and GamesReset. Whenever this function I have works and filters out some games with check boxes and a drop down menu, the function starts off with something like FilterList=GamesReset;. This functions seems to work fine until I filter out ages for the game. The function never touches GamesReset unless it's something like while(i<GamesReset.length){} or FilterList=GamesReset;. And the only tool I use when I filter games is FilterList.splice(i,1);. Now with that, GamesReset definitely, should never change as far as I know. I have it to reset FilterList, then depending on what needs to be filtered out, it will start removing those games from the FilterList. The problem I have, is that, GamesReset also becomes filtered. Which, does not make any sense at all. So like my title, it's just like saying b=0;, a=b;, a++;, and now b equals 1.
Now, I think that's the best/shortest way I can reveal this problem, without overdoing it with my bad habit of explaining things to people. I have a webpage currently available if anyone would like to see whats going on in action, because I wouldn't get what's going on with GamesReset either if I were you, here (url removed, read edit). To get the error working, just change the age to 10 without checking any boxes. The bottom paragraph is the GamesReset array (using <br> to separate each array), and it's the one that changes when I'm only changing FilterList in the JavaScript. The actual codes if you view the page source may be a little off compared to when I mentioned above, but it's pretty much 100% the same thing. I also wanted to have the codes available without a url and on this page, but I can't figure out how to do that with the html tags included.
Actually, here's the JavaScript function. I just figured out the 4 spaces thing when my question was rejected.
function SearchFilter() {
Games = GamesReset;
plat = document.getElementById('platformcheck').checked;
rpg = document.getElementById('rpgcheck').checked;
puzz = document.getElementById('puzzlecheck').checked;
hybo = document.getElementById('hybocollectcheck').checked;
ages = document.getElementById('agescheck').value;
if ((!plat) && (!rpg) && (!puzz) && (!hybo)) {
FilterList = Games;
} else {
FilterList = [];
i = 0;
while (i < Games.length) {
Set = '';
Set = Games[i];
Set = Set.split('</>');
StrFind = Set[0];
if (
(plat && (StrFind.search(',platform,') > -1)) || (rpg && (StrFind.search(',rpg,') > -1)) || (puzz && (StrFind.search(',puzzle,') > -1)) || (hybo && (StrFind.search(',hybocollect,') > -1))) {
FilterList.push(Games[i]);
}
i++;
}
// so by now, we should have the filtered array
}
//seperate filter for ages
i = 0;
while (i < FilterList.length) { //The problem should definitely start here
Set = '';
Set = FilterList[i];
Set = Set.split('</>');
StrFind = Set[1];
if ((Math.abs(StrFind)) > ages) {
FilterList.splice(i, 1);
} else {
i++;
}
}
GL.innerHTML = GamesReset.join('<br>');
}
As a reminder, the problem starts when the age filter is working. And the only thing it does is FilterList.splice(i,1);. But it ends up changing GamesReset. I changed this function a bit when I added Games=GamesReset;, but that was another test to try and make sure GamesReset doesn't get filtered like FilterList, but it still does.
EDIT: I removed my url since the answers definitely explained everything, so there's no need for it now.
Arrays are not copied when assigned, both variables will refer to the same data. Here is a post that goes into detail on this: Copying array by value in JavaScript
It makes perfect sense since variables are just references to objects in memory. One object can have several references. Consider this:
var a = { foo: 'bar' };
var b = a;
// b is now a reference to a and they both point to the same object
b.foo = 'doe';
alert( a.foo ); // alerts doe
The same goes for arrays. So when you do FilterList = GamesReset you are not copying the array - you are just assigning the same array to another variable. Any mutations or changes made to either reference will be reflected in all references.
To create a copy of an array you can use slice:
FilterList = GamesReset.slice();
I have a select box that is being populated dynamically from a database. As of right now the population of this check box is working flawlessly.
I have added functionality that consists of a button which on click calls isSelextBoxEmpty. The job of this function is to know whether this particular check box has been populated or not; if it has not then it will simply do nothing.
My problem is in determining whether this select box is empty or not.
Here is a very simplified example of what I am dealing with:
<li>
<label for="fruit_name">Fruit</label>
<select name="some_fruit" id="fruit_name" onclick="populate_box('fruit', this);">
</select>
</li>
My function, which is called from a separate button, looks like this:
function isSelextBoxEmpty(selectBoxId) {
var selected_value = $('#fruit_name');
/* More options... still testing the proper way:
var selected_value = $('#fruit_name').text;
var selected_value = $('#fruit_name').value;
var selected_value = $('#fruit_name').length;
var selected_value = $('#fruit_name option:selected', this);
var selected_value = document.getElementById('fruit_name');
var selected_value = document.getElementById('fruit_name').length;
var selected_value = document.getElementById('fruit_name').value;
var selected_value = document.getElementById('fruit_name').innerHTML;
*/
if (selected_value) {
alert("NOT null, value: " + selected_value);
// do something
}
}
Don't worry about what this does and how it does it. Right now what matters to me is that I can't check whether or not the checkbox is empty, I am just not sure how to go about it. I have read a lot through forums and documentation but there are many implications in doing this since it depends on the implementation itself.
For instance using document.getElementById(...)... will not necessarily return false and it depends on how you use it. Also using $("#someID")... in jQuery may or may not produce the desired results. I have already tried many different times as you can see in the commented lines, all of which can be evaluated in the if(...) statement.
How can this be done?
To check whether select box has any values:
if( $('#fruit_name').has('option').length > 0 ) {
To check whether selected value is empty:
if( !$('#fruit_name').val() ) {
One correct way to get selected value would be
var selected_value = $('#fruit_name').val()
And then you should do
if(selected_value) { ... }
Another correct way to get selected value would be using this selector:
$("option[value="0"]:selected")
Best for you!
Check this answer its tested and working well
if( !$('#id').val() ) {
// stuff here
}
ok. I have a dropdown. well call it dropdownA. I have several arrays already fashioned, that i want to loop through, and put each individual value out onto the page into it's own input field, based on the selection in the dropdown. I know how to put together the loop to get the values out onto the page. anyway, here is the meta code.
meta1array=new Array('','','','','','');
meta2array=new Array('','','','','','');
meta3array=new Array('','','','','','');
function metacode(id){
{
var a=get.the.dd.selIndex;
var b=get.the.dd.options[a].value; //comes back as 'meta1'. other opts are meta2, meta3
var c=b+'array';
for(i=0;i<c.count;i++)
{
loop here to popout values
}
}
i have looked everywhere, and i haven't come up with anything. I also admit that my brain is starting to mushify from a few weeks straight of coding, and this is the first time i have come across this. so, please. i would be greatful for any help.
Global variables are members of the window object.
var c = window[b + 'array'];
It might be wise to make your arrays members of some other object though, for tighter scoping (avoid cluttering the global namespace).
metaobject = {
meta1array: ['','','','',''],
meta2array: ['','','','',''],
meta3array: ['','','','','']
};
// snip
var arr = metaobject[b + 'array'];
for(var i=0;i<arr.length;i++) {
//do work
}
Check out the fiddle using jquery here.