Trying to compare two template variables is resulting in an error. This seems consistent with jade syntax. What's wrong here?
Code:
if name == current_project.name
| Current
else
a.nav-project-selection Set as Current
Error:
While building the application:
client/templates/account.jade: Jade syntax error: Expected identifier, number, string, boolean, or null
{{#if name == current_project.na...
^
SOLVED
Since Jade compiles down to Spacebars which doesn't support comparison, you have to do it via a helper function. The following worked for me:
client.js
UI.registerHelper('equals', function(a, b) {
return (a === b);
});
template
if equals name current_project.name
| Current
else
a.nav-project-selection Set as Current
An easier way is to use the Meteor-handlebar-helpers package.
meteor add raix:handlebar-helpers
Check the readme file to get an overview of the helpers. In your case:
if $eq name current_project.name
| Current
Related
I'm trying to pass a cursor to a function like this:
.create-or-alter function GetLatestValues(cursor:string) {
Logs | where cursor_after(cursor)
}
But I get a Error cursor_after(): argument #1 is invalid response. Is there something I'm missing? Is string the wrong data type to use?
This approach works properly for lambda functions:
let GetLatestValues = (cursor:string) {
Logs | where cursor_after(cursor)
};
GetLatestValues('') | take 1
By default, defining a function in Kusto validates stored function, and in case you're using cursor the system will attempt to do it with empty parameter, leading to failure.
You can override this behavior using skipvalidation=true parameter (see docs at:
https://learn.microsoft.com/en-us/azure/kusto/management/functions#create-function)
.create-or-alter function with (skipvalidation = "true")
GetLatestValues(cursor:string)
{
Logs | where cursor_after(cursor)
}
I’ve a handlebar expression which is giving me a dynamic string. I want to remove the white space between letters and use it as a div id. I know I can do this using JS. But is there a way to do this within handlebar template?
{{name}} is giving me “abc xyz” and I want “abcxyz” string.
What you can do is register a helper yourself and use it in your template to replace the white-space in the string with nothing.
Handlebars.js has a function registerHelper(String, Function) which (as you see) takes a string (the name of your helper) and a function that will return the result of your helper.
For example, if we want a helper function that replaces "Facebook" with "Google" in a given string you could do something like this.
Handlebars.registerHelper('replace', function(string) {
return string.replace('Facebook', 'Google');
});
In the template we would invoke it like {{replace "Hello, Facebook!"}} and it would return Hello, Google!.
In case of a multipurpose function (what it obviously should be in this case instead of the example I gave) you would pass the string to invoke the replacement on, the string to replace and what it should be replaced with.
Handlebars.registerHelper('replace', function(string, search, replace) {
return string.replace(search, replace);
});
In the same way as we did before we would invoke it in the template using {{replace "Hello, Facebook!" "Facebook" "Google"}}.
If you want to avoid writing your own helpers. You can use the following module : https://github.com/helpers/handlebars-helpers
simply install it
npm install --save handlebars-helpers
And you're good to go, you can use the following helper for your issue :
{{replace name " " ""}}
Here's another usage example :
{{replace "a b a b a b" "a" "z"}}
<!-- results in: 'z b z b z b' -->
I need to use a counter to remember how many node I have dealed with. So I defined a global var $classCounter. For some unknown reasons, I get an error from zorba:
test.xqy>:15,9: error [zerr:XSST0004]: "local:owlClassNameBuilerHelper": function declared nonsequential but has sequential body
I really don't understand what this error means. How to implement a global counter in XQuery?
The whole xqy file is:
declare namespace rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
declare namespace owl="http://www.w3.org/2002/07/owl#";
declare namespace xsd="http://www.w3.org/2001/XMLSchema#";
declare namespace rdfs="http://www.w3.org/2000/01/rdf-schema#";
import module namespace functx="http://www.functx.com";
declare variable $srcDoc:="test_xsd.xml"; (:need to adjust the input XSD file here:)
declare variable $defaultXMLNS:="http://www.test.com#";
declare variable $defaultXMLBase:=$defaultXMLNS;
declare variable $classCounter:=0;
declare function local:owlClassNameBuilerHelper($pnode as node()*)
as xs:string?
{
$classCounter:=classCounter+1;
let $tmp:=""
return
(
"haha"
(:if(functx:if-empty($pnode/#name, "-1")!="-1") (:if the name attr doesn't exist:)
then data($pnode/ancestor::element[1]/#name) (:get the name attr of first ancestor named element:)
else data($pnode/#name):)
)
};
element rdf:RDF
{
namespace {""} {$defaultXMLNS},
namespace {"owl"} {"http://www.w3.org/2002/07/owl#"},
namespace {"xsd"} {"http://www.w3.org/2001/XMLSchema#"},
namespace {"rdfs"} {"http://www.w3.org/2000/01/rdf-schema#"},
attribute xml:base {$defaultXMLBase}
}
command line:
zorba -i -f -q test.xqy
I need to use a counter to remember how many node I have dealed with.
Firstly, XQuery is a functional programming language. That's a completely different processing model: you can't "remember" what you have "dealt with", because there is no memory and no time dimension. Functions are mathematical functions, they can't have side-effects like updating global variables.
Now, the error message suggests to me that the particular XQuery processor you are using (Zorba) has extensions that allow you to depart from the pure functional programming model; but you are using the extensions incorrectly. In particular, if you want a function to have side-effects then you must declare the function as such. You'll have to look in the Zorba documentation for how to do that, because there is no standard.
Here is the problem (Ractive.js v0.7.3): http://jsfiddle.net/Inversion/hLym2xcy/
r = new Ractive
el: 'cont'
template: '''
{{#task.options}}
{{#if pros}}
inside if
{{#each filter(.pros)}}<li class='{{set_class(.)}}'>+{{.v}}</li>{{/each}}
{{/if}}
{{/task.options}}
'''
data:
task:
options: [{pros:[{v:1}]}]
set_class: (o)-> o.v
filter: (arr)-> console.log(arr);arr || []
setTimeout(
-> r.set('task.options.0.pros', undefined)
2000
)
On r.set operation "inside if" is not printed out as expected, but #each tries to work with an undefined array which is not expected.
I cannot guarantee presence of an pros array and that's why I used {{#if pros}} to do not use it, but seems like it doesn't work.
console.log(arr) is added to see if filter is actually called, and it is.
Also when I try to return [] from the filter it still calls set_class which is unexpected because there is nothing to iterate.
Is there a way to overcome these unexpected problems?
Thanks!
Seems like it is a known problem and will be fixed in v0.8
I have a content.xml modelled as below
<root>
<childnode>
Some text here
</childnode>
</root>
I am trying to remove the <childnode> and update the content.xml with only the value of it
so the output looks like
<root>
Some Text here
</root>
I wrote a function to perform this but anytime I run it it gives me error as "unexpected token: modify". I was thinking of a way to accomplish this without using functx functions.
xquery version "1.0";
declare namespace request="http://exist-db.org/xquery/request";
declare namespace file="http://exist-db.org/xquery/file";
declare namespace system="http://exist-db.org/xquery/system";
declare namespace util="http://exist-db.org/xquery/util";
declare namespace response="http://exist-db.org/xquery/response";
declare function local:contentUpdate() {
let $root := collection('/lib/repository/content')//root/childNode
let $rmChild := for $child in $root
modify
(
return rename node $child as ''
)
};
local:updateTitle()
Thanks in advance
There are multiple problems with your query:
Updating functions must be declared as updating.
You're calling another function than you defined (probably you didn't notice as there still have been syntax errors).
Rename node expects some element (or processing instruction, attribute) as target, the empty string is not allowed.
At least BaseX doesn't allow updating statements when defining code as XQuery 1.0. Maybe exist doesn't care about this, try adding it if you need to know.
You do not want to rename, but replace all <childnode />s with its contents, use replace node.
This code fixes all these problems:
declare updating function local:contentUpdate() {
let $root := collection('/lib/repository/content')
return
for $i in $root//childnode
return
replace node $i with $i/data()
};
local:contentUpdate()
eXist-db's XQuery Update syntax is documented at http://exist-db.org/exist/update_ext.xml. Note that this syntax predates the release of the XQuery Update Facility 1.0, so the syntax is different and remains unique to eXist-db.
The way to do what you want in eXist-db is as follows:
xquery version "1.0";
declare function local:contentUpdate() {
let $root := doc('/db/lib/repository/content/content.xml')/root
return
update value $root with $root/string()
};
local:contentUpdate()
The primary changes, compared to your original code, are:
Inserted the eXist-db syntax for your update
Prepended '/db' to your collection name, as /db is the root of the database in eXist-db; replaced the collection() call with a doc() call, since you stated you were operating on a single file, content.xml
Changed //root to /root, since "root" is the root element, so the // (descendant-or-self) axis is extraneous
Replaced updateTitle() with the actual name of the function, contentUpdate
Removed the extraneous namespace declarations
For more on why I used $root/string(), see http://community.marklogic.com/blog/text-is-a-code-smell.