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Copying PostgreSQL database to another server
...d 9.3 running on localhost:5434) you can run:
pg_dumpall -p 5432 -U myuser91 | psql -U myuser94 -d postgres -p 5434
Check out the migration docs.
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Grouping functions (tapply, by, aggregate) and the *apply family
...b = 1:3, c = 10:100)
lapply(x, FUN = length)
$a
[1] 1
$b
[1] 3
$c
[1] 91
lapply(x, FUN = sum)
$a
[1] 1
$b
[1] 6
$c
[1] 5005
sapply - When you want to apply a function to each element of a
list in turn, but you want a vector back, rather than a list.
If you find yourself typing unlist(lapp...
Metadata file '.dll' could not be found
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91 Answers
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How to detect if multiple keys are pressed at once using JavaScript?
...ving a problem with Paste on a Mac (Chrome). It successfully gets keydown 91 (command), keydown 86 (v), but then only keyups the 91, leaving 86 down. List of keys: Up: 91, Down: 86. This only seems to happen when letting go of the command key second - if I let go of it first it correctly register ...
Fragment Inside Fragment
... android:layout_margin="20dp"
android:background="#91d0c2">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Parent fragment"/>
<FrameLayout
android:id="@+id/child_fragment_c...
Using curl to upload POST data with files
...JIUzI1NiIsInR5cCI6ImFjY2VzcyIsInR5cGUiOiJhY2Nlc3MifQ.eyJ1c2VySWQiOjEsImFjY291bnRJZCI6MSwiaWF0IjoxNTExMzMwMzg5LCJleHAiOjE1MTM5MjIzODksImF1ZCI6Imh0dHBzOi8veW91cmRvbWFpbi5jb20iLCJpc3MiOiJmZWF0aGVycyIsInN1YiI6ImFub255bW91cyJ9.HWk7qJ0uK6SEi8qSeeB6-TGslDlZOTpG51U6kVi8nYc' \
-H 'content-type: applicati...
How to switch to the new browser window, which opens after click on the button?
... SuryaSurya
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3
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Ubuntu下CodeBlock开发环境配置 - C/C++ - 清泛网 - 专注C/C++及内核技术
...夹里添加路径/usr/include，这样程序编译的时候就可以遍历搜索该文件夹，一般情况下头文件都在这个文件夹下（Qt4也不例外），同理，Linker里添加/usr/lib。这时编译运行该工程便会通过，出现Demo程序的运行结果（一个只包含“Qui...
cmake与autoconf+automake的对比 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
include_HEADES=
或CFLAGS=-I
include_directories(list)
源码搜索
aux_source_directories(. list)
依赖库
LIBS=
LDADD=
target_link_libraries(binname librarylist)
标志
CFLAGS=
LDFLAGS=
set(CMAKE_C_FLAGS ...)
libtool
AC_PROG_LIBTOOL
lib...
半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术
...
if (!(strSrc[i] & 0x80)) // 找到非汉字的话,立刻停止搜索
{
break;
}
index++;
}
if (bFlag) // 原始字符串的长度比预留的空间要大
{
if (index == 0 || (index % 2) != 0)...