digitalmars.D.learn - AA init
- lurker (17/17) Mar 17 2008 hi,
- bearophile (14/14) Mar 17 2008 lurker, this works:
- Frits van Bommel (12/37) Mar 17 2008 A variation on a common theme here: AA literals aren't constants and can...
- lurker (3/42) Mar 23 2008 ok all that worked. how do i find for ex. "(0002,0000)" and get HASHTAG...
- lurker (4/50) Mar 24 2008 when i do as in the docs
- lurker (34/91) Mar 24 2008 below is the program fragment. i am using dmd 2012.
- Frits van Bommel (6/26) Mar 24 2008 [snip]
- lurker (1/1) Mar 17 2008 thank you so very much you two
- lurker (1/1) Mar 17 2008 thank you so very much you two
hi,
i try to have a hash and initialize it. it doesn't work. can anybody please
tell me how to initialize the below with many values such as
key struct values
"(0002,0000)" "UL","N","Group Length",
"(0002,0001)" "OB","N","File Meta Information Version",
....
struct HASHTAG {
//string Tag;
string VR;
string RET;
string NAME;
}
HASHTAG[string] tags = [
"(0002,0000)": {"UL","N","Group Length"},
]
this does not work. many thanks in advance.
Mar 17 2008
bearophile <bearophileHUGS lycos.com>
lurker, this works:
import std.stdio: writefln;
struct Hashtag {
string vr;
string ret;
string name;
}
void main() {
Hashtag[string] tags = ["(0002,0000)": Hashtag("UL","N","Group Length")];
writefln(tags["(0002,0000)"].name);
}
You may want to define tags inside a static this {}.
Bye,
bearophile
Mar 17 2008
lurker wrote:
hi,
i try to have a hash and initialize it. it doesn't work. can anybody please
tell me how to initialize the below with many values such as
key struct values
"(0002,0000)" "UL","N","Group Length",
"(0002,0001)" "OB","N","File Meta Information Version",
....
struct HASHTAG {
//string Tag;
string VR;
string RET;
string NAME;
}
HASHTAG[string] tags = [
"(0002,0000)": {"UL","N","Group Length"},
]
this does not work. many thanks in advance.
A variation on a common theme here: AA literals aren't constants and can
therefore not be used as initializers for global variables.
Also, struct literals not directly used as initializers can't use the '{
<members> }' syntax.
Try this instead:
---
HASHTAG[string] tags;
static this() {
tags = ["(0002,0000)": HASHTAG("UL","N","Group Length")];
}
---
Mar 17 2008
ok all that worked. how do i find for ex. "(0002,0000)" and get HASHTAG back?? thanks for any help Frits van Bommel Wrote:lurker wrote:hi, i try to have a hash and initialize it. it doesn't work. can anybody please tell me how to initialize the below with many values such as key struct values "(0002,0000)" "UL","N","Group Length", "(0002,0001)" "OB","N","File Meta Information Version", .... struct HASHTAG { //string Tag; string VR; string RET; string NAME; } HASHTAG[string] tags = [ "(0002,0000)": {"UL","N","Group Length"}, ] this does not work. many thanks in advance.A variation on a common theme here: AA literals aren't constants and can therefore not be used as initializers for global variables. Also, struct literals not directly used as initializers can't use the '{ <members> }' syntax. Try this instead: --- HASHTAG[string] tags; static this() { tags = ["(0002,0000)": HASHTAG("UL","N","Group Length")]; } ---
Mar 23 2008
when i do as in the docs
HASHTAG *tt = ("(0002,0000)" in Tags);
it will always return null.
lurker Wrote:
ok all that worked. how do i find for ex. "(0002,0000)" and get HASHTAG back??
thanks for any help
Frits van Bommel Wrote:
lurker wrote:
hi,
i try to have a hash and initialize it. it doesn't work. can anybody please
tell me how to initialize the below with many values such as
key struct values
"(0002,0000)" "UL","N","Group Length",
"(0002,0001)" "OB","N","File Meta Information Version",
....
struct HASHTAG {
//string Tag;
string VR;
string RET;
string NAME;
}
HASHTAG[string] tags = [
"(0002,0000)": {"UL","N","Group Length"},
]
this does not work. many thanks in advance.
A variation on a common theme here: AA literals aren't constants and can
therefore not be used as initializers for global variables.
Also, struct literals not directly used as initializers can't use the '{
<members> }' syntax.
Try this instead:
---
HASHTAG[string] tags;
static this() {
tags = ["(0002,0000)": HASHTAG("UL","N","Group Length")];
}
---
Mar 24 2008
below is the program fragment. i am using dmd 2012.
does anybody have a clue on how to search for a key and return the HASHTAG
value?
struct HASHTAG {
string VR;
string RET;
string NAME;
}
class Tag {
private:
HASHTAG[string] Tags;
public:
this() {
Tags = [
"(0002,0000)": HASHTAG("UL","N","Group Length"),
"(0002,0001)": HASHTAG("OB","N","File Meta Information Version"),
"(0002,0002)": HASHTAG("UI","N","Media Storage SOP Class UID")
];
}
bool Search(string key, ref TData pData) {
string RET,VR;
int nVR; HASHTAG *tt;
// the below works, it displays values correctly
HASHTAG xx[] = Tags.values;
for(int i= 0; i <Tags.length; i++) {
writefln("%s %s", xx[i].VR, xx[i].NAME);
}
// ----> will always be null, not finding the HASHTAG
tt = ("(0002,0000)" in Tags);
if (tt == null)
return false;
}
}
displaying the keys of the hash shows, that "(0002,0000)" is contained in the
hash.
lurker Wrote:
when i do as in the docs
HASHTAG *tt = ("(0002,0000)" in Tags);
it will always return null.
lurker Wrote:
ok all that worked. how do i find for ex. "(0002,0000)" and get HASHTAG back??
thanks for any help
Frits van Bommel Wrote:
lurker wrote:
hi,
i try to have a hash and initialize it. it doesn't work. can anybody please
tell me how to initialize the below with many values such as
key struct values
"(0002,0000)" "UL","N","Group Length",
"(0002,0001)" "OB","N","File Meta Information Version",
....
struct HASHTAG {
//string Tag;
string VR;
string RET;
string NAME;
}
HASHTAG[string] tags = [
"(0002,0000)": {"UL","N","Group Length"},
]
this does not work. many thanks in advance.
A variation on a common theme here: AA literals aren't constants and can
therefore not be used as initializers for global variables.
Also, struct literals not directly used as initializers can't use the '{
<members> }' syntax.
Try this instead:
---
HASHTAG[string] tags;
static this() {
tags = ["(0002,0000)": HASHTAG("UL","N","Group Length")];
}
---
Mar 24 2008
lurker wrote:below is the program fragment. i am using dmd 2012. does anybody have a clue on how to search for a key and return the HASHTAG value?[snip]this() { Tags = [ "(0002,0000)": HASHTAG("UL","N","Group Length"), "(0002,0001)": HASHTAG("OB","N","File Meta Information Version"), "(0002,0002)": HASHTAG("UI","N","Media Storage SOP Class UID") ]; } bool Search(string key, ref TData pData) {[snip]// ----> will always be null, not finding the HASHTAG tt = ("(0002,0000)" in Tags); if (tt == null) return false; } } displaying the keys of the hash shows, that "(0002,0000)" is contained in the hash.Weird... That works fine on 1.028, but indeed seems to fail on 2.012. You may want to file a bug report at <http://d.puremagic.com/issues/> if there isn't one for this already.
Mar 24 2008