大约有 15,000 项符合查询结果（耗时：0.0252秒） [XML]
How to split a large text file into smaller files with equal number of lines?
...ut fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default
size is 1000 lines, and default PREFIX is `x'. With no INPUT, or when INPUT
is -, read standard input.
Mandatory arguments to long options are mandatory for short options too.
-a, --suffix-length=N use suffixes of length N (defa...
Solving “Who owns the Zebra” programmatically?
... dog, beer, bluemaster)
no more solutions!
% (* 1,706 inferences, 0.000 CPU in 0.070 seconds (0% CPU, Infinite Lips) *)
true.
share
|
improve this answer
|
follow
...
Update one MySQL table with values from another
...wired00! This works perfectly. The tables are quite large (original is 100,000+ entries and tobeupdated 10,000+), so I took your and noodl's advice about the indexes and the whole query now finishes in under a second. I can't believe the difference!? Thanks so much for your help; I've learnt a lot!
...
read.csv warning 'EOF within quoted string' prevents complete reading of file
...bs. of 13 variables:
## $ row.names : chr "10.2307/675394" "10.2307/30007362" "10.2307/4254931" "10.2307/20537934" ...
## $ id : chr "10.2307/675394\t" "10.2307/30007362\t" "10.2307/4254931\t" "10.2307/20537934\t" ...
## $ doi : chr "Archaeological Inference and Inductiv...
How to remove all .svn directories from my application directories
... rm as it can accept. Thus, if you had a million files, it might run rm 1,000,000/65,000 times (if your shell could accept 65,002 arguments on the command line {65k files + 1 for rm + 1 for -fr}).
As persons have adeptly pointed out, the following also work:
find . -name .svn -exec rm -rf {} \;
f...
MFC RadioButton用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...(IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
BOOL bNameValid;
CString strAboutMenu;
bNameValid = strAboutMenu.LoadString(IDS_ABO...
Test if string is a guid without throwing exceptions?
...
Performance Benchmarks
Catch exception:
10,000 good: 63,668 ticks
10,000 bad: 6,435,609 ticks
Regex Pre-Screen:
10,000 good: 637,633 ticks
10,000 bad: 717,894 ticks
COM Interop CLSIDFromString
10,000 good: 126,120 ticks
10,000 bad: 23,1...
Return number of rows affected by UPDATE statements
...-----------------------------------------------
4 2011-07-01 00:00:00.000 2009-07-10 00:00:00.000
5 2011-07-01 00:00:00.000 2009-07-11 00:00:00.000
6 2011-07-01 00:00:00.000 2009-07-12 00:00:00.000
7 2011-07-01 00:00:00.000 2009-07-13 00:00:00.000
In your particular case, s...
static linking only some libraries
...cpp
# c++ test.cpp /usr/lib/libX11.a
# ldd a.out
linux-vdso.so.1 => (0x00007fff385cc000)
libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f9a5b233000)
libm.so.6 => /lib/libm.so.6 (0x00007f9a5afb0000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f9a5ad99000)
libc.so.6 => /lib/libc.so....
How would you count occurrences of a string (actually a char) within a string?
...= 17s
foreach (from bobwienholt's answer) = 10s
(The times are for 50,000,000 iterations so you're unlikely to notice much difference in the real world.)
share
|
improve this answer
|
...