|
Use code tags.
jmaida wrote: what works for you?
Two of your examples use strings as the key. However the first would appear to be a fixed set. You could attempt to optimize based on that set. I have done so in the past to achieve zero collisions.
However micro optimizations based on guessing is a waste of time. Optimize based on profiling the application using realistic data. (My example above for zero collisions was in fact a waste of time.)
If I was using C or C++ I would use an existing library.
Your code example is mixing the hash value with the hash table which works for very limited cases but in general the two should be distinct (thus the library.)
Recalculating the hash every single time might not be ideal. But avoiding that means using a more complex structure.
jmaida wrote: Substitution for binary tree name lookup that do not require a minimum guaranteed lookup time
I do not understand that statement. Hash table and binary tree are distinct data structures. You can replace one with the other but there are considerations for both which your statement does not make clear to me. I do know that I replaced a complex tree (not a normal binary tree) with a hash table and gained about a 30% speed improvement so perhaps you are referring to something like that.
|
|
|
|
|
What I meant to say is
If one does not required minimum lookup time (it's my understanding though may be wrong, that a balanced binary tree can provide a minimum lookup time), then hashing is an inexpensive alternative.
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
|
Had not seen these link, so thanx, Quite interesting.
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
do not use C++
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
BernardIE5317 wrote: do not utilize any of these?
Just noticed the following in the list of what it supports. (There are some others.)
I can only hope no one is using those.
hash support for std::chrono::weekday
hash support for std::chrono::leap_second
|
|
|
|
|
🎵 Sweet Home Alabama 🎵[^]
What do you get when you cross a joke with a rhetorical question?
The metaphorical solid rear-end expulsions have impacted the metaphorical motorized bladed rotating air movement mechanism.
Do questions with multiple question marks annoy you???
|
|
|
|
|
Maybe this software developer hasn't even tried his software on any of the "I'm my own grandpa"-structures.
You'll find numerous variations of this story/song, e.g. Ray Stevens - "I'm My Own Grandpa"[^]. Wikipedia identifies Dwight Latham and Moe Jaffe as the ones responsible for the lyrics, but you can find the same story in numerous variations and on different tunes, usually referred to as a 'folk song'. So Latham and Jaffe didn't make it up from nothing; they just wrote down a song/story that was floating around.
25-30 years ago, I was checking out the genealogy programs available at that time. Several of them wouldn't even accept cousin marriage, and certainly not Abraham and Sarah (they had the same father, so they were half-siblings).
Some people are very eager to condemn reality, because they don't like it. Personally, I want the software I create to be able to handle reality, even in cases were I don't like it.
Religious freedom is the freedom to say that two plus two make five.
|
|
|
|
|
Weather channel says it's currently -37C, feels like -45. The local airport shows a temp of -44C with a wind chill of -54. Not a day for T-shirt and shorts ...
"A little song, a little dance, a little seltzer down your pants"
Chuckles the clown
|
|
|
|
|
Wow. 45F here right now. (Phila. area) That's supposed to be the high for the day as a polar front is roaring it's way across the state with 50+MPH winds. Ice and snow expected to arrive within the hour.
|
|
|
|
|
52F in N. FL.
"Ten men in the country could buy the world and ten million can’t buy enough to eat." Will Rogers
PartsBin an Electronics Part Organizer - Release Version 1.3.0 JaxCoder.com
Latest Article: SimpleWizardUpdate
|
|
|
|
|
We have only -25°C in some regions 
|
|
|
|
|
-37C, feels like -45.
please elaborate on
feels like
it is either -37 or -45 IMHO
|
|
|
|
|
Wind chill will cause a low temperature to feel lower. The feels like -45 is based on a temperature of -45 with no wind.
|
|
|
|
|
Salvatore Terress wrote: it is either -37 or -45 IMHO
IMHO it is not.
120F in Las Vegas is very different than 120F (or even 105F) in Tampa Bay.
And I would much rather be in -5F with a 20 mph wind in the mountains of Colorado than I would be for the same in NYC.
|
|
|
|
|
56F here in Phoenix, just finished a hike.
|
|
|
|
|
-4 right now, expecting -10 during the night (and when I get up to go to work)
Cold... but not that much if I compare it to you
M.D.V.
If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
Rating helpful answers is nice, but saying thanks can be even nicer.
|
|
|
|
|
14ºC (57ºF) here (Israel), but it's night time.
k5054 wrote: Not a day for T-shirt and shorts ...
That depends on how much anti-freeze one drinks... 
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
|
|
|
|
|
-2F here currently, with -17F windchill. Not the coldest I've been in, that was -45F almost a decade ago now.
What do you get when you cross a joke with a rhetorical question?
The metaphorical solid rear-end expulsions have impacted the metaphorical motorized bladed rotating air movement mechanism.
Do questions with multiple question marks annoy you???
|
|
|
|
|
43 here is Houston.
Supposed to get into the teens late Monday and Tuesday.
Speculation.
Not that unusual, but not common.
Hey, it's winter in the Northern Hemisphere.
"A little time, a little trouble, your better day"
Badfinger
|
|
|
|
|
It's -7F (-22C) in Bob's neck o' the woods. 
/ravi
|
|
|
|
|
-4F here ~-30F wind chill, supposed get a little more chilly tomorrow.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
|
|
|
|
|
Not to turn this into a political discussion...but here's what I still don't get about climate change.
People will use this as "proof" (ahem) Earth isn't getting any warmer.
So the global warmites say this isn't how it works...weather isn't climate. Warm places will get warmer. Cold places will get colder. It's an amplification thing.
Yet they insist the Arctic being ice-free is gonna be a normal occurrence.
Well, which is it? The Arctic is cold. If it's gonna colder, it's not gonna become ice-free. But if it's then supposed to become warmer, what about that amplification effect?
Does that really sound like "settled science"? Does that make me a denier?
|
|
|
|
|
dandy72 wrote: Does that make me a denier?
Not at all. Science has always been questioning about what we think we know about the universe and trying to come up with answers that reliably explain it. Climate is messy. But the general consensus is that the earth is going through a warming period, and the most likely candidate for the change is the rise in CO2 due to human activity. Human activity also leads to a rise in pollutants in the atmosphere, and that contributes to a phenomenon known as Global dimming - Wikipedia. I don't think I've ever seen anything about how the two might be affecting each other. Then there's the theory that if arctic ice continues melting, that will reduce the salinity of the North Atlantic, which will affect ocean currents, as a result of which the Gulf Stream will cease to bring warm water northward. The result of that would be a global ice-age.
So there's a lot of contradictory information out there. It seems to me, that many of the theories about what's going on tend to be a bit "isolationist". That is they only look at what's occurring in that one specific area (e.g. global dimming), without considering how other factors might affect the entire system. Trying to get one's head around everything, and how they all interrelate, is certainly outside my comprehension level.
"A little song, a little dance, a little seltzer down your pants"
Chuckles the clown
|
|
|
|
|
in my day sonny, we programmed in the snow with our bare hands in minus 55.
HAHA
Actually that sound freakin cold. and this is way I like my office job. I really feel for those people who have to work outside in this weather. ( I greatly appreciate them doing their jobs as well )
To err is human to really elephant it up you need a computer
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
