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Is “double hashing” a password less secure than just hashing it once?
... list is less than three hours if only one iteration is used. But if just 2000 iterations are used, that time extends to almost 8 months. To defeat a more sophisticated attacker—one capable of downloading a program that can tap the power of their GPU, for example—you need more iterations.
How m...
In C#, how to instantiate a passed generic type inside a method?
...class :
public class A { }
The script to test:
const int iterations = 1000000;
Benchmark(() => new A(), iterations, "new A()");
Benchmark(() => FactoryMethod<A>(), iterations, "FactoryMethod<A>()");
Benchmark(() => FactoryClass<A>.Create(), iterations, "FactoryClass<...
Converting datetime.date to UTC timestamp in Python
...
javascript timestamp = python timestamp * 1000
– Trinh Hoang Nhu
May 30 '18 at 16:37
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show 2 more comments
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How to remove all line breaks from a string
...d be noted that there are four different new line characters in Unicode: \u000a or \n, which is a line feed; \u000d or \r, which is a carriage return; \u2028, a line separator; and \u2029, a paragraph separator. In practice though, the regex you posted is sufficient in most cases.
...
Free space in a CMD shell
...rdware by using Windows Management Instrumentation (WMI). Not for Windows 2000.
As noted by Alexander Stohr in the comments:
WMIC can see policy based restrictions as well. (even if 'dir' will still do the job),
'dir' is locale dependent.
...
How to extract the first two characters of a string in shell scripting?
...ell method is usually better if you're going to be doing it a lot (like 50,000 times per report as you mention) since there's no process creation overhead. All solutions which use external programs will suffer from that overhead.
If you also wanted to ensure a minimum length, you could pad it out b...
Efficient way to determine number of digits in an integer
...turn 10 + 1;
if (x < 0) return numDigits(-x) + 1;
if (x >= 10000) {
if (x >= 10000000) {
if (x >= 100000000) {
if (x >= 1000000000)
return 10;
return 9;
}
return 8;
}
...
In PHP, how do you change the key of an array element?
...opied" without being modified. E.g., if there's one array that contains 10'000 elements and consumes 40MB memory, copying it will consume memory that's needed for storing 10'000 only references to already existing values rather than copies of values, so if 1 array consumes 40MB, its copy might consu...
How to style a div to be a responsive square? [duplicate]
...his is a Square</h1>
</div>
CSS:
.square {
background: #000;
width: 50vw;
height: 50vw;
}
.square h1 {
color: #fff;
}
I am sure there are many other ways to do this but this way seemed the best to me.
...
How to group time by hour or by 10 minutes
...licy.workingHours)/2.0 gives 1.5 while datepart(hour, '1900-01-01 09:00:30.000')/2.0 gives 4.5 , i don't understand why? Note:workingPolicy.workingHours=1900-01-01 09:00:30.000. please help
– affanBajwa
Dec 29 '18 at 7:58
...