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How to find out line-endings in a text file?
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In vi...
:set list to see line-endings.
:set nolist to go back to normal.
While I don't think you can see \n or \r\n in vi, you can see which type of file it is (UNIX, DOS, etc.) to infer which line endings it has...
:set ff
Alter...
Picking a random element from a set
How do I pick a random element from a set?
I'm particularly interested in picking a random element from a
HashSet or a LinkedHashSet, in Java.
Solutions for other languages are also welcome.
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What is __pycache__?
... for example
python -B foo.py
Another option, as noted by tcaswell, is to set the environment variable PYTHONDONTWRITEBYTECODE to any value (according to python's man page, any "non-empty string").
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Coffeescript — How to create a self-initiating anonymous function?
How to write this in coffeescript?
8 Answers
8
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How do I pass extra arguments to a Python decorator?
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SQL Server Script to create a new user
... to be accessing the SQL Server from an application, then you will want to set the server up for "Mixed Mode" (both Windows and SQL logins) and create a Login as shown above. You'll then "GRANT" priviliges to that SQL Login based on what is needed for your app. See here for more information.
UPDA...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
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I bet entering all number in a hash set and iterating over the 1...N suite using lookups to determine if numbers are missing, would be the most generic, fastest in average regarding k variations, most debuggable most maintainable and understandable solution. Of...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中，会经常用到下面的命令：
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
它会显示例如下面的信息：
TIME_WAIT 814
CLOSE_WAIT 1
FIN_WAIT1 1
ESTABLISHED 634
SYN_RECV 2
LAST_ACK 1
常用的三个状态是：ESTABLISHED 表示正在通信，...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...ER JOIN table2 ON table2.SomeFkId = table1.SomeId
That gets you a result set where child rows in table2 cause duplication by returning the table1 results for each child row in table2. O/R mappers should differentiate table1 instances based on a unique key field, then use all the table2 columns to...
How to make shallow git submodules?
... isn't usable for submodules which don't track master very closely. If you set depth 1, then submodule update can only ever succeed if the submodule commit you want is the latest master. Otherwise you get "fatal: reference is not a tree".
That is true.
That is, until git 2.8 (March 2016). With 2....