## digitalmars.D.learn - How to easy set size of multi dimentional dynamic array?

• Zarathustra (12/12) Sep 03 2008 How to easy set size of multi dimentional dynamic array?
```How to easy set size of multi dimentional dynamic array?

for example:
class Foo{
private double[][] m_array;

this(uint o_length, uint o_width){
// hard way:
this.m_data.length = o_length;
for(uint i = 0; i < this.m_array.length; i++){
this.m_array[i] = new double[o_width];
}
}
}
```
Sep 03 2008
"Denis Koroskin" <2korden gmail.com> writes:
```On Wed, 03 Sep 2008 13:45:12 +0400, Zarathustra

How to easy set size of multi dimentional dynamic array?

for example:
class Foo{
private double[][] m_array;

this(uint o_length, uint o_width){
// hard way:
this.m_data.length = o_length;
for(uint i = 0; i < this.m_array.length; i++){
this.m_array[i] = new double[o_width];
}
}
}

Try this:

this(uint o_length, uint o_width){
m_array = new double[][](o_length, o_width);
}
```
Sep 03 2008
```Denis Koroskin Wrote:

On Wed, 03 Sep 2008 13:45:12 +0400, Zarathustra

How to easy set size of multi dimentional dynamic array?

for example:
class Foo{
private double[][] m_array;

this(uint o_length, uint o_width){
// hard way:
this.m_data.length = o_length;
for(uint i = 0; i < this.m_array.length; i++){
this.m_array[i] = new double[o_width];
}
}
}

Try this:

this(uint o_length, uint o_width){
m_array = new double[][](o_length, o_width);
}

Great, ;)
Thanks Denis
```
Sep 03 2008
Fawzi Mohamed <fmohamed mac.com> writes:
```On 2008-09-03 13:28:47 +0200, Zarathustra <adam.chrapkowski gmail.com> said:

Denis Koroskin Wrote:

On Wed, 03 Sep 2008 13:45:12 +0400, Zarathustra

How to easy set size of multi dimentional dynamic array?

for example:
class Foo{
private double[][] m_array;

this(uint o_length, uint o_width){
// hard way:
this.m_data.length = o_length;
for(uint i = 0; i < this.m_array.length; i++){
this.m_array[i] = new double[o_width];
}
}
}

Try this:

this(uint o_length, uint o_width){
m_array = new double[][](o_length, o_width);
}

Great, ;)
Thanks Denis

please not that a multidimensional array does not need to be square, so
it uses a lot of emory more.
You might be interested at my multidimensional array library (tango
only for the moment).
See http://github.com/fawzi/narray/tree/master/INSTALL.txt

ciao
Fawzi
```
Sep 06 2008