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How to get array length without length property


How to get array length without length property

By : KGilis
Date : November 19 2020, 03:59 PM
I hope this helps . Even though we can use array.length to get array length it may go wrong in a case like below.. , Calling
code :
a.length = 0;
console.log(a[2]) // undefined


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Find the length of an array without using the Length property

Find the length of an array without using the Length property


By : user1675391
Date : March 29 2020, 07:55 AM
To fix the issue you can do Use the foreach construct to iterate through each item in the array, incrementing a counter for each iteration.
Something like this:
code :
object[] o_arr = new object[5];

// code to initialise array

int i = 0;
foreach(object o in o_arr)
{
    i++;
}

Console.WriteLine(i);
What does the .NET String.Length property return? Surrogate neutral length or complete character length

What does the .NET String.Length property return? Surrogate neutral length or complete character length


By : Charles DeLone
Date : March 29 2020, 07:55 AM
it helps some times String.Length does not account for surrogate pairs, it only counts UTF-16 chars (i.e. chars are always 2 bytes) - surrogate pairs are counted as 2 chars.
Calculate the length of an array without using the length property

Calculate the length of an array without using the length property


By : Blind Sniper
Date : March 29 2020, 07:55 AM
Does that help I want that as soon as my exception is raised it breaks my loop(using break function) & print i(length of array) , You can change your code as follows
code :
static int length(String p) {
    int i = 0;
    try {
        while (i <= i) {
            char ch = p.charAt(i);
            i++;
        }
    } catch (StringIndexOutOfBoundsException e) { // catch specific exception
      // exception caught here
    }
    return i; // now i is the length 
}


public static void main(String s[]) {
    String a = "jack";
    System.out.println(length(a));
}
4
Why Java's String has the method length() rather than property length (like an array?)

Why Java's String has the method length() rather than property length (like an array?)


By : user2706740
Date : March 29 2020, 07:55 AM
Any of those help Because length() is defined in CharSequence interface, which is implemented by String. Interfaces can't define properties in Java. Also, this makes it more interchangeable with other types.
In many methods, you may rely only on CharSequence interface instead of a real String, then you can use an instance of CharBuffer, Segment, String, StringBuffer or StringBuilder in the call site.
how does JVM able to calculate array length using ArrayName.length property?

how does JVM able to calculate array length using ArrayName.length property?


By : Dennis van Ee
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Java arrays are Objects, that embed (at least) the length field and the array elements. So a reference to an array is really a reference to that object, from which the length can be extracted.
C arrays, on the other hand, are essentially unadorned arrays and so there is no included length field. The use of sizeof to determine the length works only on arrays (and not decayed pointers) where the compiler can see the declaration including the length (with the exception of VLAs, which have special handling).
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