I tried using auto instructor = instructors[_address] it gives me the error:
DeclarationError: Identifier not found or not unique.
You can define the variable first with their type and then assign them to their respective value. In your case it is:
Instructor storage instructor = instructors[_address]
Related
I am trying to run a select by attribute where I select all points where "Id" field matches the numeric variable point_id. point_id = 375.
I've tried a few quotation styles and using curly brackets to call my variable. I'm not the most familiar with SQL queries and get an error saying the positional argument follows the keyword string. I have also tried storing my SQL as a variable on it's own called a whereClause and get the same error.
First attempt code
arcpy.management.SelectLayerByAttribute(in_layer_or_view = deer,
selection_type = "NEW_SELECTION",
f'"Id"={point_id}')
Second attempt code
The is a Python issue, not related to ArcGIS or SQL.
You are trying to pass three arguments. For the first two arguments you're using keyword argument (explicitly specifying the argument name: in_layer_or_view = deer), but for the third one you're using positional argument (letting python assign the value to the appropriate argument based on the order of the arguments).
The execption you're getting is telling you that you can't mix the two types this way. Once you started using keyword arguments in the function call, all of the next argument must be passed with their explicit name too.
To fix this, you can use positional argument for all of the arguments (i.e. not specifing argument names at all), or alternatively keep specifing the names for all of the rest of the arguments.
In your case, this should work:
arcpy.management.SelectLayerByAttribute(in_layer_or_view=deer,
selection_type="NEW_SELECTION",
where_clause=f'"Id"={point_id}')
or alternatively:
arcpy.management.SelectLayerByAttribute(deer,
"NEW_SELECTION",
f'"Id"={point_id}')
I am trying to update TYPE with query:
ALTER TYPE public.enum_subscription_sub_frequency RENAME ATTRIBUTE "BI-WEEKLY" TO "BI_WEEKLY";
But it give me error ERROR: relation "public.enum_subscription_sub_frequency" does not exist but type is exist.
Kind Help me to complete this.
Screen:
Got Answer:
ALTER TYPE public.enum_subscription_sub_frequency RENAME VALUE 'BI-MONTHLY' TO 'BI_MONTHLY';
but i also need to alter multiple value of a TYPE?
Renaming a value of an enum is only supported starting with Postgres 10.
As documented in the manual you have to use rename VALUE, not rename attribute to rename the value of an enum.
Enums values are also string constants, not identifiers. Therefore you need to enclose them in single quotes, not double quotes:
ALTER TYPE public.enum_subscription_sub_frequency RENAME VALUE 'BI-WEEKLY' TO 'BI_WEEKLY';
If you wonder why you get a "type ... does not exist" error with the wrong syntax:
When you use the option RENAME ATTRIBUTE this indicates that a "regular" object type should be changed, so Postgres looks for an "real" object type.
But an "enum type" is not an "object type" and therefor Postgres complains about "type xyz does not exist", rather than a syntax error.
Why is this error
NAME must a flat structure you can not use internal table,string referenceses or structure as component
raised when I am using type in place of like in line no 2) dosen't show any error, when I am using like shows error.
What is the difference between LIKE and TYPE?
Code:
TYPES name(20) type c.
data student_name like name. "<=============== like or type
student_name = 'satya'.
write student_name.
You have created name as a type. Therefore, if you declare a variable of type name, you need to write the statement as data student_name type name..
Now if you want to create another variable like the variable student_name, you would use the like keyword in the declaration as data student_name2 like student_name.
For a more detailed explanation, refer to the documentation
I am creating a custom component and I need to create a property called "ReadOnly", and I get error message: "Not valid use keyword as an identifier"
Code is as follows:
'ReadOnly
Public Property ReadOnly As Boolean
Get
Return Me.Properties.ReadOnly
End Get
Set(ByVal value As Boolean)
Me.Properties.ReadOnly = value
End Set
End Property
What is wrong?
Thanks.
The problem is pretty obvious...You are using a reserved keyword as a name of a property, and you can't do that. It's almost like writing this code: Dim Integer As Integer. It can't be done.
You might wanna take a look here. As it says :
The following keywords are reserved, which means you cannot use them as names for your programming elements such as variables or procedures. You can bypass this restriction by enclosing the name in brackets ([ ]).
I am getting the an error while executing the code below
jmsMsg.setStringProperty("MessageHeader.ServiceName","MyService");
The error is
java.lang.IllegalArgumentException: The property name 'MessageHeader.ServiceName' is not a valid java identifier.
But as per this post! my property name is a valid one.
What is going wrong here?
I don't think it likes the . (dot) character in the name. Can you can that to something like underscore and see if that works? I get a false when running Character.isJavaIdentifierPart('c').