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Android存储系统基础知识：内部存储，外部存储，App特定目录 ASD(app speci...
...存在： /data/data//
私有目录在： /data/user/0//files/
私有目录可与文件组件一起使用来保存/读取文本（设置不带斜杠的路径），它只能由您的应用程序访问，并且在卸载应用程序时会自动删除。
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CSS z-index paradox flower
...tp://jsfiddle.net/Kx2k5/1/
(successfully tested on Fx27, Ch33, IE9, Sf5.1.10 and Op19)
CSS
.item {
/* include borders on width and height */
-webkit-box-sizing : border-box;
-moz-box-sizing : border-box;
box-sizing : border-box;
...
}
.i1:after {
content: "";
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Most efficient way to reverse a numpy array
...vehasteveha
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How to suppress specific MSBuild warning
...h /p:WarningLevel=X
msbuild.exe MySolution.sln /t:Rebuild /p:WarningLevel=0 /p:Configuration=Release
^^^^^^^^^^^^^^^^^
Warning
Level Meaning
-------- -------------------------------------------
0 Turns off emission of all warning messages.
1 ...
Xcode doesn't show the line that causes a crash
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301
You should also ensure that you have breakpoints set for all exceptions. This will cause Xcode...
MySQL, Check if a column exists in a table with SQL
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10 Answers
10
Active
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Parallel.ForEach vs Task.Factory.StartNew
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305
The first is a much better option.
Parallel.ForEach, internally, uses a Partitioner<T> t...
CSS horizontal centering of a fixed div?
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left: 50%;
margin-left: -400px; /* Half of the width */
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Understanding Linux /proc/id/maps
... following fields:
address perms offset dev inode pathname
08048000-08056000 r-xp 00000000 03:0c 64593 /usr/sbin/gpm
address - This is the starting and ending address of the region in the process's address space
permissions - This describes how pages in the region can be accesse...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
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Yes, MD5 is somewhat less CPU-intensive. On my Intel x86 (Core2 Quad Q6600, 2.4 GHz, using one core), I get this in 32-bit mode:
MD5 411
SHA-1 218
SHA-256 118
SHA-512 46
and this in 64-bit mode:
MD5 407
SHA-1 312
SHA-256 148
SHA-512 189
Figures are in megabytes ...