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Ternary operator is twice as slow as an if-else block?
...i+4],0
00000082 7E 1C jle 000000A0
00000084 8B 44 96 08 mov eax,dword ptr [esi+edx*4+8]
33: {
34: if (i > 0)
00000088 85 C0 test eax,eax
0000008a 7E 08 jle 00000094...
Why is there no xrange function in Python3?
...10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.32 s per loop
In [84]: %timeit collections.deque((x for x in xrange(10000000) if x%4 == 0), maxlen=0)
1 loops, best of 3: 1.31 s per loop
In [85]: %timeit collections.deque((x for x in iter(range(10000000)) if x%4 == 0), maxlen=0)
1 loops, b...
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
...0 MSVCR90D (private pdb symbols) c:\websymbols\msvcr90d.i386.pdb\EBEA784C96244F1E8F8D35E0391C898D1\msvcr90d.i386.pdb
75100000 75200000 kernel32 (deferred)
76750000 76796000 KERNELBASE (deferred)
77500000 77680000 ntdll (pdb symbols) c:\websym...
show all tags in git log
...situation (assuming that it points at some commit)
35805ce <--- 5b7b4ead <=== refs/tags/A
(commit) tag A
(tag)
Please also note that "git tag -f A A" (notice the absence of options forcing it to be an annotated tag) is a noop - it doesn't change the situati...
Virtual Memory Usage from Java under Linux, too much memory used
... gigabytes ... at least by one form of measurement.
java -Xms1024m -Xmx4096m com.example.Hello
Different Ways to Measure Memory
On Linux, the top command gives you several different numbers for memory. Here's what it says about the Hello World example:
PID USER PR NI VIRT RES SHR S...
Frequency table for a single variable
... 61.000000 3.56
212 Zimbabwe 66.800003 4.96
[213 rows x 3 columns]
frequency distribution with values_count(normalize=True) with no classification,length of result here is 139 (seems meaningless as a frequency distribution):
print(gm["employrate"].value_counts...
TortoiseSVN icons not showing up under Windows 7
...
96
Restarting or logging out is not necessary, simply end and run explorer.exe.
– Leigh Riffel
Apr 2 '1...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...
Bo PerssonBo Persson
84k1919 gold badges134134 silver badges196196 bronze badges
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Parser Error Message: Could not load type 'TestMvcApplication.MvcApplication'
...
96
I've had this a couple of times. It's especially frustrating as it's right off the bat, and th...
Where do “pure virtual function call” crashes come from?
...nate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5 0x00007ffff7ade84f in __cxa_pure_virtual () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6 0x0000000000400f82 in main () at purev.C:22
Highlight:
if the object is fully deleted, meaning destructor gets called, and memroy gets reclaim...