473,847 Members | 1,707 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ


I need help in hashmaps. Why doesn't this work:

#include <hash_map>

hash_map <int, string> hm1;
typedef pair <int, string> pr;
hm1.insert(str_ pair(1, "Hello"));

It compiles, but crashes at runtime, pointing to something in xhash.


Jon Cosby

Please do not reply to this email address.
Jul 22 '05
10 4770
> "Ideally, both sorted and hashed associated containers should be in the
Standard Library ..."

Oops, I meant "associativ e containers" ...

David F
Jul 22 '05 #11

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Florian Liefers | last post by:
"Hello World\n", i get error C2143 (Syntaxerror, missing ';' before '<') using the following code: #include <hash_map> struct eqstr { bool operator()(const char* s1, const char* s2) const
by: Mark | last post by:
Hi, I'm trying to use hash_map (gcc 3.2.2) with a std::string as the key. It will compile if I use <map> but I get a bunch of template compile errors when I change it to hash_map. Any suggestions? My program and the errors are below... #include <ext/hash_map> #include <string>
by: peter_k | last post by:
Hi I've defined hash_map in my code using this: ------------------------------------------- #include <string> #include <hash_map.h> & namespace __gnu_cxx {
by: kony | last post by:
Hi there, I would much appreciate your help with the following problem. Below is the code that uses a hash_map. I want to release all the memory occupied by the hash_map for other use. Apparently clear() function is not working and the trick with swap() is half working. Does anybody know how to deallocate the hash_map? Thanks in advance. Kon #include <functional>
by: jayesah | last post by:
Hi All, I am developing my code with Apache stdcxx. I am bound to use STL of Apache only. Now today I need hash_map in code but as I learned, it is not available in Apache since it is not standard c++. Though it is available with GNU STL. The code module where I use hash_map will generate separate object file during compilation. This code module is also using STL string.
by: Amit Bhatia | last post by:
Hi, I am trying to use hash maps from STL on gcc 3.3 as follows: #ifndef NODE_H #define NODE_H #include <ext/hash_map> #include "node_hasher.h" class Node; typedef hash_map<pair<int,int>, Node, Node_HasherLoc_Tree;
by: James Kanze | last post by:
On Jul 16, 10:53 pm, Mirco Wahab <wa...@chemie.uni-halle.dewrote: It depends. You might like to have a look at my "Hashing.hh" header (in the code at kanze.james.neuf.fr/code-en.html---the Hashing component is in the Basic section). Or for a discussion and some benchmarks, http://kanze.james.neuf.fr/code/Docs/html/Hashcode.html. (That article is a little out of date now, as I've tried quite a few more hashing algorithms. But the...
by: frankw | last post by:
Hi, I have a hash_map with string as key and an object pointer as value. the object is like class{ public: float a; float b; ...
by: marek.vondrak | last post by:
Hi, I am wondering if there are any functional differences between SGI's hash_map and tr1's unordered_map. Can these two containers be interchanged? What would it take to switch from hash_map to unordered_map? Thank you. -Marek
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.