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Regular expression to match URLs in Java
...
96
The best way to do it now is:
android.util.Patterns.WEB_URL.matcher(linkUrl).matches();
EDIT...
Two-way encryption: I need to store passwords that can be retrieved
...hem. The safest method if you're going to encrypt is to protect against information disclosure vulnerabilities (XSS, remote inclusion, etc). If it gets out, the attacker can eventually crack the encryption (no encryption is 100% un-reversible without the key - As @NullUserException points out this...
How to create GUID / UUID?
...e @broofa's answer, below) there are several common pitfalls:
Invalid id format (UUIDs must be of the form "xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx", where x is one of [0-9, a-f] M is one of [1-5], and N is [8, 9, a, or b]
Use of a low-quality source of randomness (such as Math.random)
Thus, develo...
Java equivalent to #region in C#
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96
No equivalent in the language... Based on IDEs...
For example in netbeans:
NetBeans/Creator s...
Windbg Step 2 分析程序堆栈实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...7680000 ntdll (pdb symbols) c:\websymbols\wntdll.pdb\ACE318E6A2F44F23A6CC5628F10A7DDC2\wntdll.pdb
我们发现MSVCR90D的pdb并没有被加载，是因为程序还没运行到，
3. 按F11
没有跳到源代码！
运行：src.path C:\Program Files (x86)\Microsoft Visual Studio 9...
Access lapply index names inside FUN
...ke function(x){parent.frame()$i+0} or function(x){--parent.frame()$i}.
Performance Impact
Will the forced duplication cause performance loss? Yes! here are the benchmarks:
> x <- as.list(seq_len(1e6))
> system.time( y <- lapply(x, function(x){parent.frame()$i[]}) )
user system elapse...
How should I use git diff for long lines?
...g something like this:
diff --git a/test-file.txt b/test-file.txt
index 19e6adf..eb6bb81 100644
--- a/test-file.txt
+++ b/test-file.txt
@@ -1 +1 @@
-this is a short line
+this is a slightly longer line
You might get something like this:
diff --git a/test-file.txt b/test-file.txt
index 19e6adf..e...
Favorite Django Tips & Features?
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96
votes
Virtualenv + Python = life saver if you are working on multiple Django proje...
Remove Object from Array using JavaScript
...=> el.name !== "John" );
log("non destructive filter > noJohn = ", format(noJohn));
log(`**someArray.length ${someArray.length}`);
// destructive filter/reassign John removed > someArray2 =
let someArray2 = getArray();
someArray2 = someArray2.filter( el => el.name !== "John" );
...
Why doesn't GCC optimize a*a*a*a*a*a to (a*a*a)*(a*a*a)?
...ting numbers between [1,2):
worst relative error using powf(a, 6.f): 5.96e-08
worst relative error using (a*a*a)*(a*a*a): 2.94e-07
worst relative error using a*a*a*a*a*a: 2.58e-07
Using pow instead of a multiplication tree reduces the error bound by a factor of 4. Compilers should not (an...