大约有 40,000 项符合查询结果（耗时：0.0282秒） [XML]
Is “double hashing” a password less secure than just hashing it once?
...a desktop system can compute 1 million hashes per second. The attacker can test her whole 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 pr...
Why is Spring's ApplicationContext.getBean considered bad?
... a given dependency you use at any time. It also makes the classes easy to test, as you can provide mock implementations of dependencies. Finally, it makes the classes simpler and more focused on their core responsibility.
Calling ApplicationContext.getBean() is not Inversion of Control! While it's...
'is' versus try cast with null check
...actually happens below the belt. Take a look at this example:
object o = "test";
if (o is string)
{
var x = (string) o;
}
This translates to the following IL:
IL_0000: nop
IL_0001: ldstr "test"
IL_0006: stloc.0 // o
IL_0007: ldloc.0 // o
IL_0008: isinst Syste...
How to vertically center a div for all browsers?
...and horizontally center a fixed-width, flexible height content box. It was tested and working for recent versions of Firefox, Opera, Chrome, and Safari.
.outer {
display: table;
position: absolute;
top: 0;
left: 0;
height: 100%;
width: 100%;
}
.middle {
display: table-c...
How do I read / convert an InputStream into a String in Java?
... I found 11 main ways to do this (see below). And I wrote some performance tests (see results below):
Ways to convert an InputStream to a String:
Using IOUtils.toString (Apache Utils)
String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
Using CharStreams (Guava)
String resu...
Vertically centering Bootstrap modal window
...g the modals by clicking out of them). But somehow it makes some of my e2e tests with protractor fail (and I can't find the reason why, it does not feel like it is a bug on this). Anyway I'm going back to the javascript answer so I don't lose more time on this. But like I said, this appears to work ...
Is it possible to use JS to open an HTML select to show its option list? [duplicate]
...
This works on latest Chromium-based Opera too.
– NoOne
Apr 25 '15 at 16:22
23
...
How do I read configuration settings from Symfony2 config.yml?
... How would this work with the Dev / Prod environments? So for testing I want the emails to send to a test email and production would get another email
– Phill Pafford
May 29 '12 at 17:07
...
What is “entropy and information gain”?
...=0: male
length>=7
| length=5: male
basically each node represent a test performed on a single attribute, and we go left or right depending on the result of the test. We keep traversing the tree until we reach a leaf node which contains the class prediction (m or f)
So if we run the name Amr...
Sort a text file by line length including spaces
...
Answer
cat testfile | awk '{ print length, $0 }' | sort -n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" " -f2...