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# How to use the moveSome() function in D

NDUKWE CHIDERA K.

## Overview

The moveSome() function in the D language is part of the std.algorithm.mutation module.

This function moves some value from a tuple value into another tuple value. It does this by simply making a copy of the value in a tuple and storing it inside another tuple.

### Example

Let’s suppose we have two tuples, A and B, and wish to move some values of A into B. We can do this using the moveSome() function. The tuple A tuple retains its value, but B now contains a copy of all or some values of A in it.

If the length of B is less than that of A, the moveSome() function returns the leftover values of A after the copy.

### Syntax

moveSome(source,target)


### Parameters

• source: This is the tuple value from which we create a copy. Some or all of the values will be copied and moved into another tuple.

• target: This contains the values that will be moved.

### Return value

The moveSome() function returns the leftovers of source after the copy if the length of target is less than that of source.

### Code


import std.algorithm.mutation;
import std.stdio: write, writeln, writef, writefln;

void main()
{
// Declare integer arrays.
int[5]  alm = [ 1, 2, 3, 4, 5 ];
int[3] balm ;

// Declare string arrays.
string[5] calm = [ "week","young","scala","house","rippen" ];
string[3] palm;

//Move some of alm into balm. Move as much as the length of balm
moveSome(alm[], balm[]);

//Move some of calm into balm. Move as much as the length of palm
moveSome(calm[], palm[]);

writeln(alm[]); // [1, 2, 3, 4, 5] After the move, the value of alm is still the same.
writeln(balm); // [1, 2, 3, 4, 5]
writeln(palm); // ["week", "young", "scala"]

}
Implementing the moveSome() method

### Explanation

• Lines 2–3: We import the modules we need to use in the code.
• Lines 5–27: We start the main function block.
• Lines 8–9: We declare some integer variables.
• Lines 12–13: We declare string array variables.
• Line 16: We use the moveSome() function to move some of alm into balm. We move as much as the length of the balm array.
• Line 19: We use moveSome() function to move some of the calm values into palm. We move as much as the length of the palm array.

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NDUKWE CHIDERA K.
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