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Pandas conditional creation of a series/dataframe column
...trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead
– denson
Oct 19 '16 at 16:48
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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
...一定参考价值：http://publib.boulder.ibm.com/infocenter/wasinfo/v6r0/index.jsp?topic=/com.ibm.websphere.express.doc/info/exp/ae/tprf_tunelinux.html
3.各种内核参数的含义：http://haka.sharera.com/blog/BlogTopic/32309.htm
4.linux服务器历险之sysctl优化linux网络：http://blog....
Oracle SQL escape character (for a '&')
...
the & is the default value for DEFINE, which allows you to use substitution variables. I like to turn it off using
SET DEFINE OFF
then you won't have to worry about escaping or CHR(38).
sha...
How can I increase the cursor speed in terminal? [closed]
...is one lets you do it within the bounds set by Apple. The Accepted Answer allows you more flexibility.
– Andrew
Feb 24 '13 at 19:18
42
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How to get time in milliseconds since the unix epoch in Javascript? [duplicate]
How can I get the current epoch time in Javascript? Basically the number of milliseconds since midnight, 1970-01-01.
2 A...
Accessing last x characters of a string in Bash
...luates to a number less than
zero, and parameter is not ‘@’ and not an indexed or associative array, it is
interpreted as an offset from the end of the value of parameter rather than a
number of characters, and the expansion is the characters between the two
offsets. If parameter is ‘@’, the...
Recover from git reset --hard?
... general.
Previously staged changes (git add) should be recoverable from index objects, so if you did, use git fsck --lost-found to locate the objects related to it. (This writes the objects to the .git/lost-found/ directory; from there you can use git show <filename> to see the contents of ...
Java and SQLite [closed]
...r Java - SWIG wrapper. It only works on Win32. http://rodolfo_3.tripod.com/index.html
sqlite-java-shell: 100% pure Java port of the sqlite3 commandline shell built with NestedVM. (This is not a JDBC driver).
SQLite JDBC Driver for Mysaifu JVM: SQLite JDBC Driver for Mysaifu JVM and SQLite JNI Librar...
Convert SQLITE SQL dump file to POSTGRESQL
...nto postgresql:///testdb
with include drop, create tables, create indexes, reset sequences
set work_mem to '16MB', maintenance_work_mem to '512 MB';
like the docs state. I then created a testdb with createdb:
createdb testdb
I ran the pgloader command like this:
pgloader comman...
C# equivalent to Java's charAt()?
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You can index into a string in C# like an array, and you get the character at that index.
Example:
In Java, you would say
str.charAt(8);
In C#, you would say
str[8];
...