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SpinButton: public property 'value' is undefined and public method 'focus()' is not a function


SpinButton: public property 'value' is undefined and public method 'focus()' is not a function

By : user2185113
Date : November 20 2020, 04:01 AM
To fix this issue Inspired on Boy With Silver Wings his answer I have found a workaround. Instead of using a specific type for the RefObject I just declared it as any and then I was able to use the componentRef. So basically I had to override the required type (component?: ISpinButton | null) => void of the componentRef to make it work. I don't know if this should be reported as a bug.
code :
import * as React from 'react';

import { DefaultButton } from 'office-ui-fabric-react/lib/Button';
import { SpinButton } from 'office-ui-fabric-react/lib/SpinButton';

class Product extends React.Component<{}, {}> {

    private spbStockRef: any = React.createRef();

    public render(): JSX.Element {
        return (
            <React.Fragment>
                <SpinButton
                    componentRef={this.spbStockRef}
                    defaultValue="0"
                    label={'Stock '}
                    min={0}
                    max={99999}
                    step={1}
                    onFocus={() => console.log('onFocus called')}
                    onBlur={() => console.log('onBlur called')} />
                <DefaultButton onClick={this.onButtonClick} />
            </React.Fragment>)
    }

    private onButtonClick = (e: React.MouseEvent<HTMLButtonElement>) => {
        const node = this.spbStockRef.current!;

        if (node) {
            console.log(node.value);
            node.focus();
        }
    }
}
export default Product;


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Public property inaccessible in public method

Public property inaccessible in public method


By : Prof. Dolles
Date : March 29 2020, 07:55 AM
will help you I'm very new to Php OOP and am getting stuck on one particular problem. I have trawled stackoverflow to try and find an answer, but can't. I've spent over an hour on this one problem and am about ready to give up. I know a Php guru will see my issue straight away, so please tell me why this class won't work.
code :
$this->testproperty; //without $
Can't call public method of non-public class: public (Google gcloud library)

Can't call public method of non-public class: public (Google gcloud library)


By : Prakash Iyer
Date : March 29 2020, 07:55 AM
it helps some times Yeah.... that problem. You wouldnt believe it, but its actually an open bug in the jdk from ... wait for it ... 1999!
You can read about it more in clojure jira and on google groups.
public Object from public method not visible in another public method in same class

public Object from public method not visible in another public method in same class


By : Gustavo Carreira
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I am a struggling newbie trying to learn and figure out this new C# language and OO style and my brain is not as sharp as 20 years ago. Here we have a simple database connection to Access (.accdb) I am instantiating a helper class which contains two methods i.e. makeconn and the readfrondb methods as follows , The line
code :
OleDbConnection con1 = // ...
public void  makeconn() {
   // Don't declare a new variable here:
   con1 = new OleDbConnection("Provider = Microsoft.ACE.OLEDB.12.0; Data Source = D:\\DATA.accdb");
}
class MyClass {
    private int myVar = 1;

    private void myFunc(){
        int myVar = 2; // function-scoped myVar overrides class-scoped myVar

        int myOtherVar;

        myOtherVar = myVar; // myOtherVar = 2 (function-scoped myVar)
        myOtherVar = this.myVar; // myOtherVar = 1 (class-scoped myVar)
    }
}
Should I use a private property/field with a public getter method or directly use a public property for proper encapsula

Should I use a private property/field with a public getter method or directly use a public property for proper encapsula


By : chandra
Date : March 29 2020, 07:55 AM
this will help A property is just a syntactic sugar for get_PropertyName and set_PropertyName methods in c#.
code :
public class Foo 
{
    public int Prop { get; private set; }
}
public class Foo 
{
    private int _prop;

    private void set_prop(int value) { _prop = value; }
    public int get_prop() { return _prop; }
}
Undefined function: 7 ERROR: operator does not exist: public.ltree public.< public.ltree[]

Undefined function: 7 ERROR: operator does not exist: public.ltree public.< public.ltree[]


By : user2186262
Date : November 24 2020, 04:01 AM
I hope this helps . I have a problem in PHP when I use ltree from PostgreSQL. I do this in SQL: , Well, thaks to IMSoP i found the answer.
Change the
code :
OPERATOR(public.<) 
OPERATOR(public.<@)
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