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Variable declared with variable keyword in sql plus(oracle 9i)?


Variable declared with variable keyword in sql plus(oracle 9i)?

By : blackhawk4560
Date : November 20 2020, 07:00 PM
around this issue The answer is already in your error message: NUMBER does not allow a precision in SQL*Plus.
code :


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Accesing variable declared without a name (just new keyword)

Accesing variable declared without a name (just new keyword)


By : user3016808
Date : March 29 2020, 07:55 AM
wish of those help You'll need to use a variable, otherwise you can't access it.
And while you are at it, use the using statement:
code :
string path = Path.Combine(Application.StartupPath, "MyDataSource.xml"));
using (var reader = new XmlTextTreader(path))
{
  ds.ReadXml(reader);
}
why variable declared to function without new keyword is undefined?

why variable declared to function without new keyword is undefined?


By : saraswati
Date : March 29 2020, 07:55 AM
With these it helps noNewObj is assigned the return value of calling myFunc(), which is undefined as no explicit return value is given.
If you were trying to use myFunc() as a constructor, you need to use the new keyword, like so:
code :
var noNewObj = new myFunc();
Is the extern keyword necessary when referring a volatile variable declared in another C source file?

Is the extern keyword necessary when referring a volatile variable declared in another C source file?


By : DSN
Date : March 29 2020, 07:55 AM
like below fixes the issue No, it's not correct.
All declarations of the same variable need to use the exact same type, and volatile is part of the type (extern is not)
code :
prog.c:2:22: error: conflicting type qualifiers for ‘flag’
 extern unsigned char flag; 
                      ^
prog.c:1:24: note: previous definition of ‘flag’ was here
 volatile unsigned char flag=0;
C# Discover Implicit Type of variable declared with the var keyword

C# Discover Implicit Type of variable declared with the var keyword


By : Nasir Ahmed
Date : March 29 2020, 07:55 AM
around this issue Simply hover over the 'var' keyword, it will tell you what type is inferred
Why isn't Java variable declared as `final` more often? Compare to let keyword in swift

Why isn't Java variable declared as `final` more often? Compare to let keyword in swift


By : Adam Messenger
Date : March 29 2020, 07:55 AM
around this issue see In Java, should I use “final” for parameters and locals even when I don't have to?
Basically, for fields, it is useful and also changes their concurrency properties. see Java concurrency: is final field (initialized in constructor) thread-safe?
code :
public void foo (final int x, final int y){
    try{
        final int z = x+y;
    }
    catch (final Exception z){
        final String message = "";
        throw new RuntimeException(message);
    }
}
public void foo (int x, int y){
    try{
        int z = x+y;
    }
    catch ( Exception z){
        String message = "";
        throw new RuntimeException(message);
    }
}
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