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digitalmars.D.learn - How to convert this function into a template ?

reply Vinod K Chandran <kcvinu82 gmail.com> writes:
Hi all,
I have a function and i want to convert this into a template so 
that i can use this function for more than one data type.
This is my function.
```D
void ArrayAdd( ref int[] x, int value) {
     int index = x.length ;
     x.length += 1 ;
     x[index] = value ;
}
```
Oct 02 2018
parent reply Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:
On Tuesday, October 2, 2018 5:40:18 AM MDT Vinod K Chandran via Digitalmars-
d-learn wrote:

 Hi all,
 I have a function and i want to convert this into a template so
 that i can use this function for more than one data type.
 This is my function.
 ```D
 void ArrayAdd( ref int[] x, int value) {
      int index = x.length ;
      x.length += 1 ;
      x[index] = value ;
 }
 ```


Why do you have a function for that? All you need to do is use the append
operator. e.g.

x ~= value;

- Jonathan M Davis
Oct 02 2018
parent reply Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 2 October 2018 at 11:49:06 UTC, Jonathan M Davis 
wrote:

 Why do you have a function for that? All you need to do is use 
 the append operator. e.g.

 x ~= value;

 - Jonathan M Davis


Thanks for the reply. I did not find that it in documentation.  
Ofcourse i lost a chance to learn about templates. By translating 
a well known function into a template, i can easiy learn the 
concept, since the template documentation is little bit hard to 
understand.
Oct 02 2018
parent reply Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:
On Tuesday, October 2, 2018 6:09:53 AM MDT Vinod K Chandran via Digitalmars-
d-learn wrote:

 On Tuesday, 2 October 2018 at 11:49:06 UTC, Jonathan M Davis

 wrote:

 Why do you have a function for that? All you need to do is use
 the append operator. e.g.

 x ~= value;

 - Jonathan M Davis


 Thanks for the reply. I did not find that it in documentation.
 Ofcourse i lost a chance to learn about templates. By translating
 a well known function into a template, i can easiy learn the
 concept, since the template documentation is little bit hard to
 understand.


The template equivalent would have been something like

void arrayAdd(T)(ref T[] x, T value)
{
    auto index = x.length;
    x.length += 1;
    x[index] = value;
}

But if you're new to the language, I'd suggest that you read this site /
book:

http://ddili.org/ders/d.en/index.html

- Jonathan M Davis
Oct 02 2018
parent reply Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 2 October 2018 at 12:23:47 UTC, Jonathan M Davis 
wrote:

 The template equivalent would have been something like

 void arrayAdd(T)(ref T[] x, T value)
 {
     auto index = x.length;
     x.length += 1;
     x[index] = value;
 }

 But if you're new to the language, I'd suggest that you read 
 this site / book:

 http://ddili.org/ders/d.en/index.html

 - Jonathan M Davis


Thanks a lot. Great help !. I will sure the check the link. :)
The doumentation did not tell me about the (T) in template. I can 
understand the "(T)" s inside the parentheses but i can't 
understand the one after template name.
Oct 02 2018
parent reply =?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:
On 10/02/2018 07:39 AM, Vinod K Chandran wrote:


 Thanks a lot. Great help !. I will sure the check the link. :)


I find the Index section useful (yes, can be improved). For example, 
just seach for "append" on this page:

   http://ddili.org/ders/d.en/ix.html


 The doumentation did not tell me about the (T) in template. I can
 understand the "(T)" s inside the parentheses but i can't understand the
 one after template name.


The Templates chapter says:

   Although T is an arbitrary name, it is an acronym for "type" and
   is very common in templates.

 
http://ddili.org/ders/d.en/templates.html#ix_templates.function%20template

Ali
Oct 02 2018
parent Vinod K Chandran <kcvinu82 gmail.com> writes:
On Tuesday, 2 October 2018 at 17:37:58 UTC, Ali Çehreli wrote:

 On 10/02/2018 07:39 AM, Vinod K Chandran wrote:


 Thanks a lot. Great help !. I will sure the check the link. :)


 I find the Index section useful (yes, can be improved). For 
 example, just seach for "append" on this page:

   http://ddili.org/ders/d.en/ix.html


 The doumentation did not tell me about the (T) in template. I


 can

 understand the "(T)" s inside the parentheses but i can't


 understand the

 one after template name.


 The Templates chapter says:

   Although T is an arbitrary name, it is an acronym for "type" 
 and
   is very common in templates.


 http://ddili.org/ders/d.en/templates.html#ix_templates.function%20template

 Ali


Thanks for the reply. Yes, the tutorial in that link contains 
append array. I think its  good for me to learn with this 
tutorial, everything is structured and easy to find.
Oct 02 2018