When using the dollar-dollar-function in prototype I alway get an array of elements back, instead of just one element with the dollar-function. How can I combine the power of CSS-selectors of $$ but still get only one element back?
Changing the structure of the source is not possible, so I can't just select it with the id. It needs to get selected with CSS, but should just return one element.
You can also do
$$('.foo').first()
It looks cleaner than $$('.foo')[0] for my taste :)
It does not make sense to return a single element when selecting by class name because potentially there could be many elements in the DOM that have this class. So you could always use the first element of the returned array if you are sure that it will be unique.
$$('.foo')[0]
Related
As mentioned above, I want to replace the 2nd part of a list returned from a function with the 2nd part squared.
n[s]:= {1*s,2*s};
ReplacePart[n[s],2->?^2]
I need the question mark to equal the current value returned. What is the most concise way of doing this with or without ReplacePart?
Perhaps
n[s]:= {1*s,2*s};
n[s]/.{y_,z_}->{y,z^2}
which returns {s,4s^2}
You can also write that as
ReplaceAll[n[s],{y_,z_}->{y,z^2}]
If the list may or may not have more than two elements then
ReplaceAll[n[s],{y_,z_,x___}->{y,z^2,x}]
will maintain any additional elements unchanged
I am trying to find XPath of an element which has no attribute. It can only be identified by its parent's attribute. However, the parent also does not have unique attribute.
Eg: //*[#id="btn"][1]/ul/li[2]/a/span
Here there are 2 elements with id=btn. How do i get the 2nd element. The above syntax gives me 1st element.. However if i use:
//*[#id="btn"][2]/ul/li[2]/a/span
I get an error message
"The xpath expression '//*[#id="btn"][2]/ul/li[2]/a/span' cannot be evaluated or does not result in a WebElement "
Try this, you select those two first, then use brackets around and index them.
(//*[#id="btn"]/ul/li[2]/a/span)[2]
By the way, it's not a good practice to have multiple elements sharing same ids, if you are the developer, may consider change them.
every time i want to get the Value of my DomAttr i get an TypeError:
My Code:
Wanted = page.getByXPath("//span[contains(.,'Some')]/parent::a/#href");
return this
[DomAttr[name=href value=URLSTRING]]
Now i want to geht the value (=URLSTRING) with Wanted.getNodeName();
but every Time i get the Error
Cannot find function getNodeValue in object [DomAttr[name=href value=
same when i use getValue
please help me
There are some things that make no sense in the code (particularly, because it is not complete). However, I think I can guess what the issue is.
getByXPath is actually returning a List (funny thing you missed the part of the code in which you specify it as a list and replaced it with a Wanted).
Note you should probably also have type warnings in the code too.
Now, you can see that the returned value is in square brackets. That means it is a List (confirming first assumption).
Finally, although you happened to miss that part of the code too, I guess you are directly applying the getValue to the list instead of the DomAttr elements in the list.
How to solve it: If you need more than 1 result iterate over the elements of the list (that Wanted word over there). If you need 1 result then user the getFirstByXPath method.
Were my guesses right?
I have a very poorly coded JSP that I am trying to run automation on. There are a series of checkboxes with names (no IDs) of "delete[x]" where X is the item number of the item populated. I am trying to select all the checkboxes so I can delete every entry. Here is what I have
check_boxes = []
check_boxes.push(#browser.checkbox(:xpath, "//input[contains(#name,'delete')]"))
puts check_boxes.size
check_boxes.each do |check_box|
check_box.set
The problem with this is it only selects the first instance (node) that matches the xpath to dump into the array. I know I can iterate through the xpath adding an index to the node, and then put a rescue in that drops me out when the index goes out of bounds, but that seems like the dirty way to do it.
I know there is an "as" tag that gets a set of anchors and i was wondering if there was a method like that for taking the whole selection of checkboxes
I don't think the problem is the xpath itself. It is the #browser.checkbox that is causing only the first checkbox to be returned.
If you want all matching checkboxes, you should use (notice the plural):
#browser.checkboxes
Note that checkboxes returns a collection of checkboxes. Unless you are doing something really fancy, you usually do not need to convert it to an array.
You can simply do:
#browser.checkboxes(:name => /delete/).each do |checkbox|
checkbox.set
end
What is the XPath to find only ONE node (whichever) having a certain attribute (actually I'm interested in the attribute, not the node). For example, in my XML, I have several tags having a lang attribute. I know all of them must have the same value. I just want to get any of them.
Right now, I do this : //*[1][#lang]/#lang, but it seems not to work properly, for an unknown reason.
My tries have led me to things ranging from concatenation of all the #lang values ('en en en en...') to nothing, with sometimes inbetween what I want but not on all XML.
EDIT :
Actually //#lang[1] can not work, because the function position() is called before the test on a lang attribute presence. So it always takes the very first element found in the XML. It worked best at the time because many many times, the lang attribute was on root element.
After some more tackling, here is a working solution :
(//#lang)[1]
Parentheses are needed to separate the [1] from the attribute name, otherwise the position() function is applied within the parent element of the attribute (which is useless since there can be only one attribute of a certain name within a tag : that's why //#lang[2] always selects nothing).
Did you tried this?
//#lang[1]
here you can see an example.
The following XPath seems to do what you want:
//*[#lang][1]/attribute::lang