indirection Questions
4
Solved
I am trying to create a constant name dynamically and then get at the value.
define( CONSTANT_1 , "Some value" ) ;
// try to use it dynamically ...
$constant_number = 1 ;
$constant_name = ("CONST...
Tammy asked 22/10, 2010 at 8:44
4
Solved
Is there a way to use placeholders in YAML like this:
foo: &FOO
<<propname>>:
type: number
default: <<default>>
bar:
- *FOO
propname: "some_prop"
def...
Lianaliane asked 12/1, 2017 at 18:44
7
Solved
How can I make this code work?
#!/bin/bash
ARRAYNAME='FRUITS'
FRUITS=( APPLE BANANA ORANGE )
for FRUIT in ${!ARRAYNAME[@]}
do
echo ${FRUIT}
done
This code:
echo ${!ARRAYNAME[0]}
Prints APPL...
Bihar asked 24/6, 2012 at 19:49
6
Solved
I'm reading "Bash Guide for Beginners". It says:
If the first character of PARAMETER is an exclamation point, Bash uses the value of the variable formed from the rest of PARAMETER as the...
Jean asked 15/12, 2011 at 5:11
3
Solved
I've read this quote in a book:
There is no problem in computer science that can't be solved using another level of indirection.
Can someone explain that? What does "level of indirection" me...
Zonnya asked 1/8, 2013 at 20:7
7
What does the quote "Level of Indirection solves every Problem" mean in Computer Science?
Goldeneye asked 13/11, 2008 at 22:47
2
I have difficulty understanding when and why the value held by a pushed Scalar container is affected after the push. I'll try to illustrate the issue that I ran into in a more complicated context i...
Rand asked 5/10, 2019 at 15:17
1
Solved
EDIT: This has been confirmed to be a bug and will be fixed: https://lists.gnu.org/archive/html/bug-bash/2018-03/msg00055.html
So I'm messing around with bash's indirection feature, namerefs. I ...
Reading asked 8/3, 2018 at 17:59
1
Solved
Is there a way to reference a particular element in a yaml array?
For example if I have this bit of yaml:
node_list:
- one
- two
- three
Can I do something like this:
first_node: node_list[0...
Betthel asked 15/5, 2017 at 19:12
1
Solved
I'm looking for a unary functor which will dereference it's argument and return the result. Of course I can write one, it just seemed like something should already exist.
So given the code:
const...
Anagrammatize asked 5/1, 2017 at 14:15
2
Solved
So in the interest of creating a Minimal. Complete, Verifiable Example I have created a toy iterator here (I know it's not perfect, it's just for the purposes of asking a question):
class foo : pu...
Quadrilateral asked 12/5, 2016 at 15:24
1
Solved
I have trouble understanding how UNPACK works in Haskell.
Consider, for example, the following data declarations:
data P a b = P !a !b
data T = T {-# UNPACK #-} !(P Int Int)
How will datatype T ...
Epochal asked 26/11, 2015 at 6:34
1
Bash script to create multiple arrays from csv with unknown columns.
I am trying to write a script to compare two csv files with similar columns. I need it to locate the matching column from the o...
Danyel asked 23/5, 2014 at 1:57
2
Solved
I was playing around with gcc and tried the following bit of code:
int A = 42;
int *B = &A;
int *C = &*B;
And C == &A, as expected. But when I try:
int *B = NULL;
int *C = &*B;
...
Varner asked 21/1, 2014 at 1:17
2
Solved
TL;DR
Given the following code:
int* ptr;
*ptr = 0;
does *ptr require an lvalue-to-rvalue conversion of ptr before applying indirection?
The standard covers the topic of lvalue-to-rvalue in ma...
Abroms asked 10/1, 2014 at 19:53
3
Solved
Is it possible to set a variable by concatenating two strings together to form the name?
If at all possible I'd like to determine what variable to set based on the class names of the object...
Inheritable asked 31/10, 2013 at 3:3
4
Solved
I am reading up on c# arrays so my question is initially on arrays.
What does declaring an array actually mean? I know you declare a variable of type array. When I have the following, what is actu...
Insubordinate asked 11/7, 2013 at 11:39
2
Solved
This is basically a continuation of this question. So far it looks like that if I have a function like this:
void SecureZeroMemory( void* ptr, size_t cnt )
{
volatile char *vptr = (volatile char ...
Publish asked 6/12, 2012 at 13:35
8
Solved
When declaring pointers in C, there are 3 variants:
Variant A:
int* ptr;
Variant B:
int *ptr;
Variant C:
int * ptr;
In A, the indirection operator has been appended to the type....
Ahead asked 20/1, 2012 at 20:9
3
Solved
my problem is a simple one. I have a class template that holds a pointer to a dynamically allocated type. I want to overload the indirection operator so that referring to the class template i...
Lardner asked 12/1, 2012 at 19:18
2
Solved
I'm trying to create an iterator class as a member-class for a list class, and am trying to overload the indirection operator (*) to access the list it's pointing to:
template<class T>
T lis...
Waddington asked 20/5, 2009 at 23:1
1
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