Is there any way to call a function or a variable within a realm query such as this? The _getDate() function can't seem to be called within the filtered
realm.objects('Round').filtered('id !== {_getDate()}')
Can you try the following code? Use string template syntax (Backtick instead quote and ${_getDate()}.) Also, Realm's query syntax is not same as JavaScript. It doesn't have !== operator. Use !=.
realm.objects('Round').filtered(`id != ${_getDate()}`)
Related
Here I have a scala UDF that checks if a url is one of my domains. To check if 'to_site' is one of my domains, I'm using indexOf in javascript.
CREATE TEMPORARY FUNCTION our_domain(to_site STRING)
RETURNS BOOLEAN
LANGUAGE js AS """
domains = ['abc.com', 'xyz.com'];
if (to_site == null || to_site == undefined) return false;
for (var i = 0; i < domains.length; i++){
var q= DOMAIN('XYZ');
if (String.prototype.toLowerCase.call(to_site).indexOf(domains[i]) !== -1)
return true;
}
return false;
""";
SELECT our_domain('www.foobar.com'), our_domain('www.xyz.com');
This returns false, then true.
It would be much nicer if I could use the DOMAIN(url) function from javascript. indexOf is not very good because it will match www.example.com?from=www.abc.com, when actually example.com is not one of my domains. Javascript also has a (new URL('www.example.com/q/z')).hostname to parse the domain component, but it includes the subdomain like 'www.' which complicates the comparison. Bigquery's DOMAIN(url) function only gives the domain and knowing google it's fast C++.
I know I can do this
our_domain(DOMAIN('www.xyz.com'))
But in general it would be nice to use some of the bigquery API functions in javascript. Is this possible?
I also tried this
CREATE TEMPORARY FUNCTION our_domain1(to_site String)
AS (our_domain(DOMAIN(to_site));
but it fails saying DOMAIN does not exist.
DOMAIN() function is supported in BigQuery Legacy SQL whereas Scalar UDFs are part of BigQuery Standard SQL.
So, unfortunatelly, no, you cannot use DOMAIN() function with code that uses Scalar UDF as of now at least.
And, no, you cannot use SQL Functions within JS [Scalar] UDFs, but you can use them in SQL UDFs
Finally, as I suggested in my answer on your previous question - in somple scenario like this your particular one - you better use SQL Scalar SQL vs. JS Scalar UDFs - they do not have LIMITs that JS UDFs have
The DOMAIN function in legacy SQL is more or less just a regular expression. Have you seen this previous question about DOMAIN? As Mikhail points out, you should be able to define a SQL UDF that uses a regex to extract the domain and then checks if it's in your list.
I'm trying to make a lookup to a hash table m.notes using concatenated value of position.qid and literal ".qid" like this:
$tag(name="itemId", content=m.notes.(position.qid".qid").itemId)$
I tried different options, but I get runtime error. Can someone correct my syntax?
Put the 2 items in an array. StringTemplate concatenates all items in an array (or as they call it, a multi-valued-attribute) when it executes a ToString() on it.
[position.qid, ".qid"]
So, if position.qid evaluates to "hello", this expression would become
hello.qid.
Not sure whether such concatenation is possible in string template. Why don't you use a different method that could do the concatenation and return the value.
e.g:
position.fullQid instead of position.qid
where,
public String getFullQid(){
return getQid() + ".qid";
}
in template group, I can do like this, first, define a concantenate template:
concantenate(substr)::=""
then use as following
(concantenate([position.qid,".qid"]))
I'm using VB.Net and I would like to know how to get the selected checkboxes in a checkboxlist using linq and lambda syntax (not query syntax, repeat NO query syntax).
I tried this but it's definitely not right.
cblRequired.Items.OfType(Of ListItem).Where(Function (i As ListItem ) i.Selected End Function)
I believe that the only thing wrong with your code is that you should not have the End Function, since it's a single-line lambda expression. This should work:
cblRequired.Items.OfType(Of ListItem).Where(Function(i As ListItem) i.Selected)
Technically, you don't need to specify the type of i, since it will automatically infer the type:
cblRequired.Items.OfType(Of ListItem).Where(Function(i) i.Selected)
If you want it to be a multi-line lamba expression, that would look like this:
cblRequired.Items.OfType(Of ListItem).Where(Function(i)
Return i.Selected
End Function)
i have a populated list:
def someList=... (string values)
and I want to pass this into a SQL statement to restrict which columns the query selects.
db.rows("select ${someList} from arch_application")
However, I get this error when I try to do so:
There is a ? parameter in the select list. This is not allowed.
Anyone have an ideas? Thanks!
When you pass a GString to Sql.rows, it gets parsed differently than normal in groovy. In particular, it creates a PreparedStatement with replaceable parameters for ${} substitutions. In your case this is probably not what you want. Try forcing the GString to a Java string:
db.rows("select ${someList.join(',')} from arch_application" as String)
I have a method that takes an System.Action, this is what I'm trying to feed it:
Function() Me._existingImports = Me.GetImportedAds()
The thing is that it complains about the = sign since it thinks I'm trying to do a comparison, which I'm not. I want to assign the Me._existingImports the value of Me.GetImportedAds(), but VB.NET complains about DataTable not having a = operator.
How can I force it to use the assignment operator instead of the equality operator?
In C# this works perfectly fine:
() => this.existingImports = this.GetImportedAds()
For now the solution will be to use a standalone method, but that's way more code than needed.
When using Function(), you really define an anonymous function which means you map values to values.
Therefore Function() strictly needs an expression (like x or 42 ...) as the body, which an assignment is not! (Assignments don't evaluate to values like in C-style languages in VB)
Thus what you need is not a Function() but a Sub(), which contains statements (actions) rather than values.
Sub() Me._existingImports = Me.GetImportedAds()
C# doesn't distinguish here, the (much nicer) ... => ... syntax covers it all.