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Merge a Branch into Trunk
...between repository URLs into '.':
U foo.c
U bar.c
U .
$ # build, test, verify, ...
$ svn commit -m "Merge branch_1 back into trunk!"
Sending .
Sending foo.c
Sending bar.c
Transmitting file data ..
Committed revision <N+1>.
See the SVN book chapter on merging f...
C# code to validate email address
...spec. The only way to truly verify whether an e-mail is valid is to send a test message.
– Cogwheel
Dec 15 '15 at 23:40
4
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Plotting time in Python with Matplotlib
... using pyplot.plot (after parsing them from their string representation). (Tested with matplotlib versions 1.2.0 and 1.3.1.)
Example:
import datetime
import random
import matplotlib.pyplot as plt
# make up some data
x = [datetime.datetime.now() + datetime.timedelta(hours=i) for i in range(12)]
y ...
How to add column if not exists on PostgreSQL?
...believe means that you must be on PostgresSQL 9.1 or newer.
This has been tested on 9.1 and works. Note: It will raise an error if the schema/table_name/or data_type are invalid. That could "fixed", but might be the correct behavior in many cases.
CREATE OR REPLACE FUNCTION add_column(schema_nam...
Fastest way to iterate over all the chars in a String
In Java, what would the fastest way to iterate over all the chars in a String, this:
8 Answers
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what is the right way to treat Python argparse.Namespace() as a dictionary?
...
Yes, it is okay to access the __dict__ attribute. It is a well-defined, tested, and guaranteed behavior.
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Do sealed classes really offer performance Benefits?
...t-in-net-core-and-net-framework/
Original Answer:
I made the following test program, and then decompiled it using Reflector to see what MSIL code was emitted.
public class NormalClass {
public void WriteIt(string x) {
Console.WriteLine("NormalClass");
Console.WriteLine(x);
...
Is it possible to use getters/setters in interface definition?
...f you think there is a burning use case for it. Here is an example:
class Test {
// Yes
getName = () => 'Steve';
// No
getName() => 'Steve';
// No
get name() => 'Steve';
}
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How to convert a PIL Image into a numpy array?
...
Open I as an array:
>>> I = numpy.asarray(PIL.Image.open('test.jpg'))
Do some stuff to I, then, convert it back to an image:
>>> im = PIL.Image.fromarray(numpy.uint8(I))
Filter numpy images with FFT, Python
If you want to do it explicitly for some reason, there are pi...
创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...库C上新建这个物化视图却失败，说：“ORA-12014: 表 'T_MV_TEST' 不包含主键约束条件”。如果将此表的主键增加字段并ENABLE后操作，又说：“ORA-23412: 主表的主键列已更改”。
但有一个奇怪的现象：在数据库B上我们也建立过物化视...