Re: Insert a char in string

[Ali Çehreli via Digitalmars-d-learn]

On 07/10/2014 09:05 AM, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I try to use
the array.insertInPlace, but, not work...

I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


Here is another solution, which does not modify the original string:

import std.stdio;
import std.algorithm;
import std.range;
import std.string;

void main()
{
auto number = 12345678;

auto formatted =
zip(number.retro, sequence!n + 1)
.map!(z = format(!(z[1] % 3) ? %s, : %s, z[0]))
.join
.retro;

assert(formatted.equal(12,345,678));
}

I am not happy with the .join there because I think it makes an array 
but I could not get it to compile with the lazy .joiner because I think 
it dose not look like a bidirectional range to .retro.


Ali

Re: Insert a char in string

[JR via Digitalmars-d-learn]

On Thursday, 10 July 2014 at 19:33:15 UTC, simendsjo wrote:

On 07/10/2014 06:05 PM, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use

the array.insertInPlace, but, not work...

I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


Do you really want to insert a comma in the string, or do you 
want to

format a number as 100,000,000,000.00?


For that, one approach would be as in 
http://dpaste.dzfl.pl/bddb71eb75bb.

Insert a char in string

[Alexandre via Digitalmars-d-learn]

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I try 
to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');

Re: Insert a char in string

[John Colvin via Digitalmars-d-learn]

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


insertInPlace works like this:

auto X = 100;
auto X1 = X;
X.insertInPlace(3, ',');
assert(X == 100,);
assert(X1 == 100);


You can also do this:

auto X = 100;
auto N = X[0 .. 3] ~ ',' ~ X[3 .. $];
assert(X == 100);
assert(N == 100,);

Re: Insert a char in string

[Alexandre via Digitalmars-d-learn]

Sorry..
I mean:

auto X = 100;
auto N = X.insertInPlace(3,',');

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');

Re: Insert a char in string

[Alexandre via Digitalmars-d-learn]

I used that solution:

string InsertComma(string val)
{
return val[0 .. $-2] ~ , ~ val[$-2 .. $];
}

On Thursday, 10 July 2014 at 16:23:44 UTC, John Colvin wrote:

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


insertInPlace works like this:

auto X = 100;
auto X1 = X;
X.insertInPlace(3, ',');
assert(X == 100,);
assert(X1 == 100);


You can also do this:

auto X = 100;
auto N = X[0 .. 3] ~ ',' ~ X[3 .. $];
assert(X == 100);
assert(N == 100,);

Re: Insert a char in string

[via Digitalmars-d-learn]

On Thursday, 10 July 2014 at 16:20:29 UTC, Alexandre wrote:

Sorry..
I mean:

auto X = 100;
auto N = X.insertInPlace(3,',');

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


`std.array.insertInPlace` doesn't return anything. In place 
here means in situ, i.e. it will not create a new string, but 
insert the new elements into the existing one. This operation may 
still reallocate, in which case the array slice you're passing in 
will be updated to point to the new memory.


Either use this instead:

auto x = 100;
auto n = x.dup;
n.insertInPlace(3, ',');
// or: insertInPlace(n, 3, ',');

... or use slicing and concatenating to construct a new string:

auto g = x[0 .. 3] ~ ',' ~ x[3 .. $];

(Side note about style: It's common practice to use lower-case 
names for variables, upper-case first letters are used to denote 
types. But of course, that's a matter of taste.)

Re: Insert a char in string

[Alexandre via Digitalmars-d-learn]

Oh, I used that letters in upper case, just for a simple sample...

On Thursday, 10 July 2014 at 16:32:53 UTC, Marc Schütz wrote:

On Thursday, 10 July 2014 at 16:20:29 UTC, Alexandre wrote:

Sorry..
I mean:

auto X = 100;
auto N = X.insertInPlace(3,',');

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:
I have a string X and I need to insert a char in that 
string...


auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use the array.insertInPlace, but, not work...


I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


`std.array.insertInPlace` doesn't return anything. In place 
here means in situ, i.e. it will not create a new string, but 
insert the new elements into the existing one. This operation 
may still reallocate, in which case the array slice you're 
passing in will be updated to point to the new memory.


Either use this instead:

auto x = 100;
auto n = x.dup;
n.insertInPlace(3, ',');
// or: insertInPlace(n, 3, ',');

... or use slicing and concatenating to construct a new string:

auto g = x[0 .. 3] ~ ',' ~ x[3 .. $];

(Side note about style: It's common practice to use lower-case 
names for variables, upper-case first letters are used to 
denote types. But of course, that's a matter of taste.)

Re: Insert a char in string

[simendsjo via Digitalmars-d-learn]

On 07/10/2014 06:05 PM, Alexandre wrote:
 I have a string X and I need to insert a char in that string...
 
 auto X = 100;
 
 And I need to inser a ',' in position 3 of this string..., I try to use
 the array.insertInPlace, but, not work...
 
 I try this:
 auto X = 100;
 auto N = X.insertInPlace(1,'0');

Do you really want to insert a comma in the string, or do you want to
format a number as 100,000,000,000.00?

Re: Insert a char in string

[Alexandre via Digitalmars-d-learn]

basically format
I read a cobol struct file...

From pos X to Y I have a money value... but, this value don't 
have any format..


0041415

The 15 is the cents... bascally I need to put the ( comma ), we 
use comma to separate the cents, here in Brazil...


On Thursday, 10 July 2014 at 19:33:15 UTC, simendsjo wrote:

On 07/10/2014 06:05 PM, Alexandre wrote:

I have a string X and I need to insert a char in that string...

auto X = 100;

And I need to inser a ',' in position 3 of this string..., I 
try to use

the array.insertInPlace, but, not work...

I try this:
auto X = 100;
auto N = X.insertInPlace(1,'0');


Do you really want to insert a comma in the string, or do you 
want to

format a number as 100,000,000,000.00?

Re: Insert a char in string

[simendsjo via Digitalmars-d-learn]

On 07/10/2014 09:58 PM, Alexandre wrote:
 basically format
 I read a cobol struct file...
 
 From pos X to Y I have a money value... but, this value don't have any
 format..
 
 0041415
 
 The 15 is the cents... bascally I need to put the ( comma ), we use
 comma to separate the cents, here in Brazil...
 
 On Thursday, 10 July 2014 at 19:33:15 UTC, simendsjo wrote:
 On 07/10/2014 06:05 PM, Alexandre wrote:
 I have a string X and I need to insert a char in that string...

 auto X = 100;

 And I need to inser a ',' in position 3 of this string..., I try to use
 the array.insertInPlace, but, not work...

 I try this:
 auto X = 100;
 auto N = X.insertInPlace(1,'0');

 Do you really want to insert a comma in the string, or do you want to
 format a number as 100,000,000,000.00?
 

I'm not sure what you're trying to do though.
Do you need to fix the file by adding a comma at appropriate places? Or
read it into D and write it to the console with your currency format?
This is one way of reading in the values using slices and std.conv:

import std.stdio, std.conv;
void main() {
immutable input = 0041415;
double amount = input[0..$-2].to!double();
amount += input[$-2..$].to!double() / 100;
writeln(amount);
}