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How does password salt help against a rainbow table attack?
...for the purpose: let's say the attacker wants to build a rainbow table for 100,000 commonly used english words and typical passwords (think "secret"). Without salt she would have to precompute 100,000 hashes. Even with the traditional UNIX salt of 2 characters (each is one of 64 choices: [a–zA–Z...
JSF backing bean structure (best practices)
...s like separating your methods. You dont want 1 big method which runs over 100's of lines, but rather split it up with new methods that handles their specific task.
Remember, most likely someone other than you will have to work on your JSF projects aswell.
As for the coupling, I dont see it as a ...
Looking for a good world map generation algorithm [closed]
...ranges values to what shows up on the map. If your "height" goes from 0 to 100, then make 0 - 20 water, 20 - 30 beach, 30 - 80 grass, 80 - 100 mountains. I think notch did something similar to this in minicraft, but I'm not an expert, I'm just in a diamond square mindset after finally getting it wor...
SOAP or REST for Web Services? [closed]
...
+100
I built one of the first SOAP servers, including code generation and WSDL generation, from the original spec as it was being develop...
CSS :after not adding content to certain elements
...: 42px;
height: 24px;
border: 1px solid currentColor;
border-radius: 100px;
cursor: pointer;
transition: all 100ms;
background-size: 30%;
outline: none;
position: relative;
box-sizing: border-box;
background-color: #eee;
transition: background-color 200ms;
&::before {
...
How to implement the activity stream in a social network
... enough for most of the commonly-hit screens on your site. The most recent 100 for each user or something like that. With Redis in the mix, it might work like this:
Create your MySQL activity record
For each friend of the user who created the activity, push the ID onto their activity list in Redis...
Is a Java hashmap search really O(1)?
...ts, it makes no difference whether it's closer to O(1) or not. Even O(n/10^100) is still O(n). I get your point about efficiency bringing then ratio down but that still puts the algorithm at O(n).
– paxdiablo
Jun 28 '09 at 16:59
...
Select by partial string from a pandas DataFrame
...ise, regex search is slower than substring search:
df2 = pd.concat([df1] * 1000, ignore_index=True)
%timeit df2[df2['col'].str.contains('foo')]
%timeit df2[df2['col'].str.contains('foo', regex=False)]
6.31 ms ± 126 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
2.8 ms ± 241 µs per l...
Custom CSS Scrollbar for Firefox
...lways) are colored.
Visual Demo:
.scroll {
width: 20%;
height: 100px;
border: 1px solid grey;
overflow: scroll;
display: inline-block;
}
.scroll-color-auto {
scrollbar-color: auto;
}
.scroll-color-dark {
scrollbar-color: dark;
}
.scroll-color-light {
scrollbar-col...
HTML5 Canvas vs. SVG vs. div
...ed and kept track of in Javascript. HTML nodes were movable Divs.
I added 100,000 nodes to each of my two tests. They performed quite differently:
The HTML test tab took forever to load (timed at slightly under 5 minutes, chrome asked to kill the page the first time). Chrome's task manager says th...