I can't seem to find a solution to this.
I'm trying to nest a if statement inside a for loop in Jade engine (using express js).
The base code is shown below:
form
select
for obj, i in phoneModel
option(value='#{i}') #{obj.phone_model}
What I would like to do is to have a IF statement inside the for loop to check to see if a varaible "deviceIndex" is a certain value. Eg. If deviceIndex == i, then do something, else do some other thing.
I have tried the code below:
form
select
for obj, i in phoneModel
- if(phoneIndex == #{i})
option(value='#{i}') #{obj.phone_model}
- else
option(value='#{i}' selected='selected') #{obj.phone_model}
It gives the "expect indent, but got newline" error. I expect it is my placement of the if statement inside the for loop; however, I have tried just about every combination of tabs and spaces as well as putting the "option(val..." line inside a bracket on the same line as the if statement.
What's with the typeof around a boolean? And shouldn't the phone with phoneIndex == i be the one selected? Also, the point of Jade is to have much cleaner code. Tell me if this works:
form
select
for obj, i in phoneModel
option(value=i, selected=phoneIndex==i)= obj.phone_model
Related
So I have a string from a rendered template that looks like
"Dear {{user_name}},\r\n\r\nThank you for your purchase. If you have any questions, we are happy to help.\r\n\r\n\r\n{{company_name}}\r\n{{company_phone_number}}\r\n"
All those variables like {{user_name}} are optional and do not need to be included but I want to check that if they are, they have {{ in front of the variable name. I am using liquid to parse and render the template and couldn't get it to catch if the user only uses 1 (or no) opening brackets. I was only able to catch the proper number of closing brackets. So I wrote a method to check that if these variables exist, they have the correct opening brackets. It only works, however, if all those variables are found.
here is my method:
def validate_opening_brackets?(template)
text = %w(user_name company_name company_phone_number)
text.all? do |variable|
next unless template.include? variable
template.include? "{{#{variable}"
end
end
It works, but only if all variables are present. If, for example, the template created by the user does not include user_name, then it will return false. I've also done this loop using each, and creating a variable outside of the block that I assign false if the conditions are not met. I would really, however, like to get this to work using the all? method, as I can just return a boolean and it's cleaner.
If the question is about how to rewrite the all? block to make it return true if all present variable names have two brackets before them and false otherwise then you could use something like this:
def validate_opening_brackets?(template)
variables = %w(user_name company_name company_phone_number)
variables.all? do |variable|
!template.include?(variable) || template.include?("{{#{variable}")
end
end
TL;DR
There are multiple ways to do this, but the easiest way I can think of is to simply prefix/postfix a regular expression with the escaped characters used by Mustache/Liquid, and using alternation to check for each of your variable names within the template variable characters (e.g. double curly braces). You can then use String#scan and then return a Boolean from Enumerable#any? based on the contents of the Array returned by from #scan.
This works with your posted example, but there may certainly be other use cases where you need a more complex solution. YMMV.
Example Code
This solution escapes the leading and trailing { and } characters to avoid having them treated as special characters, and then interpolates the variable names with | for alternation. It returns a Boolean depending on whether templated variables are found.
def template_string_has_interpolations? str
var_names = %w[user_name company_name company_phone_number]
regexp = /\{\{#{var_names.join ?|}\}\}/
str.scan(regexp).any?
end
Tested Examples
template_string_has_interpolations? "Dear {{user_name}},\r\n\r\nThank you for your purchase. If you have any questions, we are happy to help.\r\n\r\n\r\n{{company_name}}\r\n{{company_phone_number}}\r\n"
#=> true
template_string_has_interpolations? "Dear Customer,\r\n\r\nThank you for your purchase. If you have any questions, we are happy to help.\r\n\r\n\r\nCompany, Inc.\r\n(555) 555-5555\r\n"
#=> false
I'm using JSRender 1.0.5, and the docs on this page: https://www.jsviews.com/#contextualparams
suggest I can do this:
"A contextual parameter is defined by simply writing ~myValue=... (for any expression) on any block tag, such as {{if}} or {{for}}."
But when I use it on a for loop, I cannot get it to work. I've spent hours on this - very frustrating.
{{for data.collection ~collectionIdx=#getIndex()}}
<div id="someDiv">Index = {{:~collectionIdx}}</div>
{{/for}}
What I really want to do is pass the index of the outer loop into an inner loop, but I can't even get the basic functionality to work. If I spit out {{:#getIndex()}} inside the loop, it works fine - I just can't assign it to a contextual parameter.
What's the fix?
#index, or #getIndex() return the index of an 'item view' - when your context is within a {{for someArray}} which loops over an array.
But if you are not within a loop (over an array) the #index is undefined so renders as an empty string...
In your example your contextual parameter, ~collectionIdx=#getIndex() is in the outer context, so it stores the value undefined.
But if you have nested loops then it will correctly render the index values at the appropriate level:
{{for outerArray}}
{{for innerArray ~collectionIdx=#getIndex()}}
<div>Outer Index = {{:~collectionIdx}}</div>
<div>Inner Index = {{:#getIndex()}}</div>
{{/for}}
{{/for}}
I need the "elabora prenotazione" button to be shown only when the column "stato prenotazione" is "IN SOSPESO"
I tried to set a condition but I don't know how to pick the column value
If I understand your question, this could help:
For the source of your report:
SELECT
CASE
WHEN stato_prenotazione = 'in sospeso' THEN 'elabora prenotazione'
ELSE ''
END name_of_column,
prenotazione,
username,
nome,
cognome,
viaggio,
stato_viaggio,
data_prenota,
stato_prenotazione,
numero_ospiti
FROM your_table
Then set the column "name_of_column" to type: link, and fill the target.
Wrap a condition around a call to apex_page.get_url within your SQL, so it will only produce a link when relevant
Example of function in use, sans condition:
https://azureoutput.wordpress.com/2017/10/18/custom-hyperlink-in-interactive-report/
Use this to make the button look prettier, and maybe get some other ideas
https://www.grassroots-oracle.com/2015/12/tutorial-include-action-button-in-report.html
See this in regard to escaping special characters, otherwise you'll just see HTML in your report
https://www.grassroots-oracle.com/2017/01/escape-special-characters-apex-demo.html
This could be resolved by a simple case statement as #sara mentioned.
something like:
select (case stato_prenotazione when 'in sospeso' then 'elabora prenotazione' end) as your_column
I would not keep else condition so that the column will simply contain null value if the condition is not met.
I've been trying to write a query to get distinct attribute values after using if/then to determine whether I'll use the element in the first place. Here's my example xml and the query i've written so far:
<donors>
<donor donor_id="x21" cn_id="x12">
<homeless>$1201</homeless>
<conservation>$300</conservation>
<cancerResearch>$250</cancerResearch>
</donor>
<donor donor_id="x23" cn_id="x13">
<homeless>$121</homeless>
<conservation>$30</conservation>
<cancerResearch>$50</cancerResearch>
</donor>
<donor donor_id="x24" cn_id="x14">
<homeless>$1201</homeless>
<cancerResearch>$250</cancerResearch>
</donor>
<donor donor_id="x25" cn_id="x12">
<homeless>$1201</homeless>
<conservation>$300</conservation>
<cancerResearch>$250</cancerResearch>
</donor>
</donors>
I want to first get all donors who have a child "conservation". I've done the following for that:
<conservationists>
{
for $x in //donor
return
if(exists($x/conservation))
then <conservationist cn_id="{$x/#cn_id}/>
else ()
}
</conservationists>
I tried wrapping the whole thing in distinct-values but that just gave nothing, and every where else I tried doing something to that effect I just ended up with an end tag.
This is one possible way :
<conservationists>
{
for $x in distinct-values(//donor[conservation]/#cn_id)
return
<conservationist cn_id="{$x}"/>
}
</conservationists>
xpathtester demo
The expression distinct-values(//donor[conservation]/#cn_id) returns distinct values of cn_id attribute from donor elements that have at least one conservation child element.
comics = load_comics( '/comics.txt' )
Popup.make do
h1 "Comics on the Web"
list do
comics.each do |name, url|
link name, url
end
end
end
I am new to ruby. This is a piece of code from a ruby website.
I cant find what 'link' and 'list' keyword in the menu.
can someone explain it a little bit those two keywords, and where is the definition of those two keyword .
I am also confused on how they read the variables name and url, they are reading it by the space at the same line or what?
so if I have
Comics1 link_of_comics_site_1
Comics2 link_of_comics_site_2
Comics3 link_of_comics_site_3
so for the first iteration, name=Comics1, and url =link_of_comics_site_1
Thanks.
That's not just Ruby. That's a template for a webpage using ruby add-on methods for HTML generation.
But presumably, the result of the call to load_comics is a Hash, where the keys are names and the values are URLs. You could make one of those yourself:
my_comics_hash = { "name1" => "url1", "name2" => "url2" }
which you can then iterate over the same way:
my_comics_hash.each do |name, url|
puts "Name #{name} goes with URL #{url}"
end
In your code, it's building up an HTML list inside a popup window, but it's the same idea. The each method iterates over a collection - in this case a Hash - and runs some code on every item in that collection - in this case, each key/value pair. When you call each, you pass it a block of code inside do ... end; that's the code that gets run on each item. The current item is passed to the code block, which declares a variable to hold it inside the pipes right after the word do. Since we're iterating over key/value pairs, we can declare two variables, and the key goes in the first and the value in the second.
In ruby function, parenthesis is optional and the ";" end of statement is also optional. ej
link "click here" , "http://myweb.com"
is equivalent to :
link("click here", "http://myweb.com");
But If you have more than one statement in a line the ";" is a must, ej
link("click here1", "http://myweb.com"); link("click here2", "http://myweb.com");
In your code it could be written in
link(name, url)
or just
link(name, url);
or
link name, url
But it is highly recommended to put parenthesis around function parameters for readability unless you have other reason . The ";" is not common in ruby world .