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by: Damien Morton |
last post by:
Ive been doing some investigation of python hashtables and the hash
function used in Python.
It turns out, that when running pystone.py, as much time is spent in
string_hash() as is spent in lookdict_string(). If you look at
python's hash function, shown below, you can get an idea why - a
multiply is used for every character in the string.
static long
string_hash1(register char *p, int size)
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by: pembed2003 |
last post by:
Hi All,
Does C++/STL have hashtable where I can do stuff like:
Hashtable h<int>;
h.store("one",1);
h.store("two",2);
and then later retrieve them like:
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by: Bryan Olson |
last post by:
The current Python standard library provides two cryptographic
hash functions: MD5 and SHA-1 . The authors of MD5 originally
stated:
It is conjectured that it is computationally infeasible to
produce two messages having the same message digest.
That conjecture is false, as demonstrated by Wang, Feng, Lai and
Yu in 2004 . Just recently, Wang, Yu, and Lin showed a short-
cut solution for finding collisions in SHA-1 . Their result
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by: barcaroller |
last post by:
I'm looking for a hash function (in C) that will convert a string of
arbitrary length (but less than 1024 chars) to a reasonably-unique 16-bit
short integer. Can anyone point me to such a hash function?
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by: Johan Tibell |
last post by:
I would be grateful if someone had a minute or two to review my hash
table implementation. It's not yet commented but hopefully it's short
and idiomatic enough to be readable. Some of the code (i.e. the
get_hash function) is borrowed from various snippets I found on the
net. Thee free function could probably need some love. I have been
thinking about having a second linked list of all entries so that the
cost of freeing is in proportion to...
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by: Hallvard B Furuseth |
last post by:
Is the code below valid? Generally a value must be accessed
through the same type it was stored as, but there is an exception
for data stored through a character type. I'm not sure if that
applies in this case though:
#include <limits.h>
unsigned foo(void) {
static const union {
unsigned char str;
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by: merrittr |
last post by:
Hi
in the code below in the main the hash table from K&R example replaces
a node when a collision occurs
What I am trying to do is set it up to "chain" another structure
beside the node that it collides with
can you spot what I am doing wrong? zork and 122 are to 2 that collide
so the "zork" node gets overwritten by
121.
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by: TheCite |
last post by:
I am trying to make a function to hash passwords with. Here is the
code:
Option Compare Database
Option Explicit
'function declarations
Private Declare Function CryptAcquireContext Lib "advapi32.dll" Alias
"CryptAcquireContextA" (ByRef phProv As Long, ByVal pszContainer As
Any, ByVal pszProvider As Any, ByVal dwProvType As Long, ByVal dwFlags
As Long) As Long
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by: joe shoemaker |
last post by:
I would like to convert url into md5 hash. My question is that md5
hash will create collision at 2^64. If you do long(value,16), where
value is the md5 hash string, would value returned from long(value,
16) be unique as long as md5 hashed string is unique? when you move
md5 hashed string to long, where will the collision occur, at anything
hash = md5.new()
hash.update("some_url_")
value = hash.digest()
value_in_int = long(value, 16)...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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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...
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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...
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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...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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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
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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