Hello,
I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
Though this seems like a programming question, i have posted here
because i need to write the solution in c++.
Thanks,
Balaji.
6  1571  ka************* ******@gmail.co m wrote:
Hello,
I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
Though this seems like a programming question, i have posted here
because i need to write the solution in c++.
Well, then your answer can be found in the FAQ: http://www.parashift.com/c++-faq-lit...t.html#faq-5.2
and http://www.parashift.com/c++-faq-lit...t.html#faq-5.9
Because the solution is independent of the language. ka************* ******@gmail.co m wrote:
[snip]
I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
[snip]
You might consider storing your data as a std::multimap. The first column
would be the key_type and the second and third need to be combined into the
mapped_type. Then, you could use lower_bound() and upper_bound().
Best
Kai-Uwe Bux
On Aug 23, 12:02*am, Kai-Uwe Bux <jkherci...@gmx .netwrote:
kasthurirangan. bal...@gmail.co m wrote:
[snip]I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
[snip]
You might consider storing your data as a std::multimap. The first column
would be the key_type and the second and third need to be combined into the
mapped_type. Then, you could use lower_bound() and upper_bound().
Best
Kai-Uwe Bux
Hello Kai,
Thanks. Your answer seems to be an apt fit. Actually, i was planning
to use multimap, but the key being a pair of the ranges and was
looking for already available algorithms where i can pass a predicate,
rather than reinvent. Once again, thanks to you.
Thanks,
Balaji.
On Aug 22, 11:08*pm, red floyd <no.spam.h...@e xample.comwrote :
kasthurirangan. bal...@gmail.co m wrote:
Hello,
I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
Though this seems like a programming question, i have posted here
because i need to write the solution in c++.
Well, then your answer can be found in the FAQ:
http://www.parashift.com/c++-faq-lit...t.html#faq-5.2
and
http://www.parashift.com/c++-faq-lit...t.html#faq-5.9
Because the solution is independent of the language.- Hide quoted text -
- Show quoted text -
Hello Red,
Special thanks to you for pointing me that.:-) Re-read again.
Actually i was looking for solution in c++(something already
available, rather than reinvent). I was also planning to post in
comp.programmin g but didn't want to cross/double post in the beginning
itself.
Thanks,
Balaji. ka************* ******@gmail.co m wrote in news:9dc89336-659c-4aed-89f8- 34**********@56 g2000hsm.google groups.com:
Hello,
I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
Though this seems like a programming question, i have posted here
because i need to write the solution in c++.
Thanks,
Balaji.
If you are sorted by all three fields, then you should be able to use
std::lower_boun d() which has a predicate version. This will do a binary
search on the data.
Hope that helps,
joe ka************* ******@gmail.co m wrote:
On Aug 23, 12:02*am, Kai-Uwe Bux <jkherci...@gmx .netwrote:
>kasthurirangan .bal...@gmail.c om wrote:
[snip]I have a string list of the format
rangeA rangeB 001
rangeA rangeB1002
rangeA rangeC 003
rangeB rangeC 004
This list is sorted according to the ranges in column 1. Now i have a
value rangeA1B. What is the efficient way to search this value? I need
to select all the three rangeA in the search. Using std::search or
std::find is a best choice here? Or if i need to write any algorithm,
what is that?
[snip]
You might consider storing your data as a std::multimap. The first column
would be the key_type and the second and third need to be combined into the
mapped_type. Then, you could use lower_bound() and upper_bound().
Best
Kai-Uwe Bux
Hello Kai,
Thanks. Your answer seems to be an apt fit. Actually, i was planning
to use multimap, but the key being a pair of the ranges and was
looking for already available algorithms where i can pass a predicate,
rather than reinvent. Once again, thanks to you.
It's really starting to look like the prof found a problem with no
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