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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...
Numpy - add row to array
...lock
print('numpy 1.14 takes {:.3f} micros per row'.format(duration * 1e6 / n_loops))
start_clock = perf_counter()
for count in range(0, n_loops):
py_array.append(py_row) # .15 micros
numpy_array = np.array(py_array) # 43.9 micros
duration = perf_counter() - start...
What's the $unwind operator in MongoDB?
...{
"result" : [
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
"title" : "this is my title",
"author" : "bob",
"tags" : "fun"
},
{
"_id" : ObjectId("4e...
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?
...
96
votes
Virtualenv + Python = life saver if you are working on multiple Django proje...
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...
How to format a number as percentage in R?
...7.29905 84.47743 90.38425 112.22889 #paste(formatC())
# 4 krlmlr() 243.19699 267.74435 304.16202 280.28878 311.41978 534.55904 #scales::percent()
So sprintf emerges as a clear winner when we want to add a percent sign. On the other hand, if we only want to multiply the number and round (go from...
Why is a round-trip conversion via a string not safe for a double?
...4(0x9896800000000000),
/*8*/ I64(0xbebc200000000000),
/*9*/ I64(0xee6b280000000000),
/*10*/ I64(0x9502f90000000000),
/*11*/ I64(0xba43b74000000000),
/*12*/ I64(0xe8d4a51000000000),
/*13*/ I64(0x9184e72a00000000),
/*14*/ I64(0xb5e620f480000000),
/*15*/ I64(0xe35fa931a0...
What is the correct way to create a single-instance WPF application?
...
{
static Mutex mutex = new Mutex(true, "{8F6F0AC4-B9A1-45fd-A8CF-72F04E6BDE8F}");
[STAThread]
...
}
Having a named mutex allows us to stack synchronization across
multiple threads and processes which is just the magic I'm looking
for.
Mutex.WaitOne has an overload that spe...
htmlentities() vs. htmlspecialchars()
...
96
Because:
Sometimes you're writing XML data, and you can't use HTML entities in a XML file.
Be...