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Why is the String class declared final in Java?
...s very useful to have strings implemented as immutable objects. You should read about immutability to understand more about it.
One advantage of immutable objects is that
You can share duplicates by pointing them to a single instance.
(from here).
If String were not final, you could create a...
WheelView 拓展：滚轮选择框扩展，滚轮日历选择框和旋转日历扩展 · App In...
...、日的列表
GetSelectedYear 获取选中年份() {:.number .read-only}
获取用户选择的年份。
返回值：数字类型，选中的年份
GetSelectedMonth 获取选中月份() {:.number .read-only}
获取用户选择的月份。
返回值：...
Why is quicksort better than mergesort?
...esign. However, other things – such as locality of reference (i.e. do we read lots of elements which are probably in cache?) – also play an important role on current hardware. Quicksort in particular requires little additional space and exhibits good cache locality, and this makes it faster than...
Select n random rows from SQL Server table
...IME ON
SET STATISTICS IO ON
/* newid()
rows returned: 10000
logical reads: 3359
CPU time: 3312 ms
elapsed time = 3359 ms
*/
SELECT TOP 1 PERCENT Number
FROM Numbers
ORDER BY newid()
/* TABLESAMPLE
rows returned: 9269 (varies)
logical reads: 32
CPU time: 0 ms
elapsed time: 5...
Efficiency of purely functional programming
... needs to implement algorithms on purely-functional data structures should read Okasaki. You can always get at worst an O(log n) slowdown per operation by simulating mutable memory with a balanced binary tree, but in many cases you can do considerably better than that, and Okasaki describes many use...
How can I replace every occurrence of a String in a file with PowerShell?
...-Content file.txt) is required:
Without the parenthesis the content is read, one line at a time, and flows down the pipeline until it reaches out-file or set-content, which tries to write to the same file, but it's already open by get-content and you get an error. The parenthesis causes the oper...
Useless use of cat?
...equent single greps you learn the placement of the file argument and it is ready knowledge that the first is the pattern and the later ones are file names.
It was a conscious choice to use cat when I answered the question, partly because of a reason of "good taste" (in the words of Linus Torvalds) ...
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934 - 更多技术...
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934现象：EDD:Error 8000 reading sector 2106934No DEFAULT or UI configuration directive found!boot:Getting closer!When i ...现象：
EDD:Error 8000 reading sector 2106934
No DEFAULT or UI configuration directive found!
boot:
...
How do I prevent a Gateway Timeout with FastCGI on Nginx
...imeout of response (which was bit misleading). For FastCGI there's fastcgi_read_timeout which is affecting the fastcgi process response timeout.
HTH.
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What is the purpose of the -nodes argument in openssl?
... encrypt any file: you don't want someone who obtains a copy to be able to read it or use it. Whether you should encrypt the private key depends on the importance of the key and your threat model.
– indiv
Sep 25 '18 at 17:48
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