The regex I use when I want to be precise is `&quot;\r\n?|\n&quot;`.

When I&#39;m not concerned about consistency or empty lines, I use `&quot;[\r\n]+&quot;`, I imagine it makes my programs somewhere in the order of 0.2% faster.

The pattern can be simplified to `\r?\n` for a little performance gain, as you probably don&#39;t have to deal with the old Mac style (OS 9 is unsupported since February 2002).

Now I want to display some unicode characters and I have used tag: `&lt;font face=&quot;
Arial&quot;&gt;something here&lt;/font&gt;`. But it seems that `WebView` can not find the Arial
font because I can only see UFO-characters. Do I have to copy arial.ttf to
somewhere or how can I use this TrueType font with `WebView`? Thanks.

 How to use custom font with WebView

Is accessing/changing dictionary values thread-safe?

I have a global dictionary `foo` and multiple threads with ids `id1`, `id2`, ... , `idn`. Is it OK to access and change `foo`&#39;s values without allocating a lock for it if it&#39;s known that each thread will only work with its id-related value, say thread with `id1` will only work with `foo[id1]`?

Using a global dictionary with threads in Python

My program can accept data that has newline characters of \n, \r\n or \r (eg Unix, PC or Mac styles)

What is the best way to construct a regular expression that will match whatever the encoding is?

Alternatively, I could use universal_newline support on input, but now I&#39;m interested to see what the regex would be.


Regular Expression to match cross platform newline characters

My program can accept data that has newline characters of \n, \r\n or \r (eg Unix, PC or Mac styles)
What is the best way to construct a regular expression that will match whatever the encoding is?
Alternatively, I could use universal_newline support on input, but now I'm interested to see what the regex would be.

I want to call a function from my model at a template such  as:

    class ChannelStatus(models.Model):
     ..............................
     ..............................
    
    	def get_related_deltas(self,epk):
    		mystring = &quot;&quot;
    		if not self.get_error_code_delta(epk):
    			return mystring
    		else:
    			for i in self.get_listof_outage():
    				item = i.error_code.all()
    				for x in item:
    					if epk == x.id:
    						mystring= mystring +&quot; &quot;+str(i.delta())
    		return mystring			

	

And when I want to call this from the template:
assume  while rendering, I pass channel_status_list as 

    channel_status_list = ChannelStatus.objects.all()

    {% for i in channel_status_list %}
      {{ i.get_related_deltas(3) }}
    {% endfor %}

This doesn&#39;t work, I am able to call a function that consumes nothing, but couln&#39;t find what to do if it has parameter(s)

Cheers

django template system, calling a function inside a model

How would you prompt the user for some input but timing out after N seconds?

Google is pointing to a mail thread about it at http://mail.python.org/pipermail/python-list/2006-January/533215.html but it seems not to work. The statement in which the timeout happens, no matter whether it is a `sys.input.readline` or `timer.sleep()`, I always get:
```none
&lt;type &#39;exceptions.TypeError&#39;&gt;: [raw_]input expected at most 1 arguments, got 2
```

which somehow the except fails to catch.

Keyboard input with timeout?

What is more efficient in Python in terms of memory usage and CPU consumption - Dictionary or Object?

**Background:**
I have to load huge amount of data into Python. I created an object that is just a field container. Creating 4M instances and putting them into a dictionary took about 10 minutes and ~6GB of memory. After dictionary is ready, accessing it is a blink of an eye.

**Example:**
To check the performance I wrote two simple programs that do the same - one is using objects, other dictionary:

Object (execution time ~18sec):

    class Obj(object):
      def __init__(self, i):
        self.i = i
        self.l = []
    all = {}
    for i in range(1000000):
      all[i] = Obj(i)

Dictionary (execution time ~12sec):

    all = {}
    for i in range(1000000):
      o = {}
      o[&#39;i&#39;] = i
      o[&#39;l&#39;] = []
      all[i] = o

**Question:**
Am I doing something wrong or dictionary is just faster than object? If indeed dictionary performs better, can somebody explain why?





Dictionary vs Object - which is more efficient and why?

I&#39;m a bit confused about inheritance under sqlalchemy, to the point where I&#39;m not even sure what type of inheritance (single table, joined table, concrete) I should be using here. I&#39;ve got a base class with some information that&#39;s shared amongst the subclasses, and some data that are completely separate. Sometimes, I&#39;ll want data from all the classes, and sometimes only from the subclasses. Here&#39;s an example:

    class Building:
        def __init__(self, x, y):
            self.x = x
            self.y = y

    class Commercial(Building):
        def __init__(self, x, y, business):
            Building.__init__(self, x, y)
            self.business = business

    class Residential(Building):
        def __init__(self, x, y, numResidents):
            Building.__init__(self, x, y, layer)
            self.numResidents = numResidents

How would I convert this to SQLAlchemy using declarative? How, then, would I query which buildings are within `x&gt;5` and `y&gt;3`? Or which Residential buildings have only 1 resident?

SQLAlchemy Inheritance

I have a string that looks like so:

    6&#194;&#160;918&#194;&#160;417&#194;&#160;712

The clear cut way to trim this string (as I understand Python) is simply to say the string is in a variable called `s`, we get:

    s.replace(&#39;&#194; &#39;, &#39;&#39;)

That should do the trick. But of course it complains that the non-ASCII character `&#39;\xc2&#39;` in file blabla.py is not encoded.

I never quite could understand how to switch between different encodings.

Here&#39;s the code, it really is just the same as above, but now it&#39;s in context. The file is saved as UTF-8 in notepad and has the following header:

    #!/usr/bin/python2.4
    # -*- coding: utf-8 -*-

The code:

    f = urllib.urlopen(url)

    soup = BeautifulSoup(f)

    s = soup.find(&#39;div&#39;, {&#39;id&#39;:&#39;main_count&#39;})

    #making a print &#39;s&#39; here goes well. it shows 6&#194; 918&#194; 417&#194; 712

    s.replace(&#39;&#194; &#39;,&#39;&#39;)

    save_main_count(s)


It gets no further than `s.replace`...

How to make the python interpreter correctly handle non-ASCII characters in string operations?

I have a function that uses `Pattern#compile` and a `Matcher` to search a list of strings for a pattern.  

This function is used in multiple threads. Each thread will have a unique pattern passed to the `Pattern#compile` when the thread is created.  The number of threads and patterns are dynamic, meaning that I can add more `Pattern`s and threads during configuration.

Do I need to put a `synchronize` on this function if it uses regex?  Is regex in java thread safe?


Is Java Regex Thread Safe?

In eclipse, is it possible to use the matched search string as part of the replace string when performing a regular expression search and replace?

Basically, I want to replace all occurrences of

    variableName.someMethod()

with:

    ((TypeName)variableName.someMethod())

Where `variableName` can be any variable name at all.

In *sed* I could use something like:

    s/[a-zA-Z]+\.someMethod\(\)/((TypeName)&amp;)/g

That is, `&amp;` represents the matched search string. Is there something similar in Eclipse?

Thanks!

Eclipse, regular expression search and replace

Is there a way that I can find out how many matches of a regex are in a string in Python? For example, if I have the string `&quot;It actually happened when it acted out of turn.&quot;`

I want to know how many times `&quot;t a&quot;` appears in the string. In that string, `&quot;t a&quot;` appears twice. I want my function to tell me it appeared twice. Is this possible?

Find out how many times a regex matches in a string in Python

I am trying to find and delete a line using Notepad++

I need to find lines in this file (UNIX Format) that match the string `&#39;`#RedirectMatch Permanent`&#39;` and delete that line.

Does anyone know how to do this using Notepad++ Find and Replace?

Thanks and Kind Regards,

Notepad++ Regular expression find and delete a line

Is there a way to get the name of a captured group in C#?

    string line = &quot;No.123456789  04/09/2009  999&quot;;
    Regex regex = new Regex(@&quot;(?&lt;number&gt;[\d]{9})  (?&lt;date&gt;[\d]{2}/[\d]{2}/[\d]{4})  (?&lt;code&gt;.*)&quot;);
    
    GroupCollection groups = regex.Match(line).Groups;
    
    foreach (Group group in groups)
    {
        Console.WriteLine(&quot;Group: {0}, Value: {1}&quot;, ???, group.Value);
    }

I want to get this result:

&lt;pre&gt;
Group: [I don&#180;t know what should go here], Value: 123456789  04/09/2009  999
Group: number, Value: 123456789
Group: date,   Value: 04/09/2009
Group: code,   Value: 999
&lt;/pre&gt;

How do I get the name of captured groups in a C# Regex?

I just started using [Qt][1] and noticed that it uses its own make tool, [qmake][2].

- Why does Qt use its own make tool?
- Is there something special that prevents it from using a standard make tool?
- Does qmake call the [GCC][3] C++ compiler?


  [1]: http://en.wikipedia.org/wiki/Qt_%28toolkit%29
  [2]: http://en.wikipedia.org/wiki/Qmake
  [3]: http://en.wikipedia.org/wiki/GNU_Compiler_Collection

Why does Qt use its own make tool, qmake?

I&#39;m looking to implement a simple timer mechanism in C++. The code should work in Windows and Linux. The resolution should be as precise as possible (at least millisecond accuracy). This will be used to simply track the passage of time, not to implement any kind of event-driven design. What is the best tool to accomplish this?

C++ Cross-Platform High-Resolution Timer

Is there a way to modify the `PATH` environment variable in a platform independent way using python?

Something similar to `os.path.join()`?

Python: Platform independent way to modify PATH environment variable

I need to execute a program and retrieve its stdout output in c++. I&#39;d like my code to be cross-platform too.

Having recently discovered the wonderful world of the Boost c++ libraries for all your cross platform needs, I figured I&#39;d just go to boost.org and read up on the documentation of Boost.Process. Much to my surprise, it wasn&#39;t there! I then proceeded to figure out what name Boost gave their cross-platform library to start external processes, but haven&#39;t managed to find it so far.

A Google search brought me to Julio M. Merino Vidal&#39;s [Boost.Process][1], which seems to be the unofficial Boost library I was looking for. Strangely enough, I cannot seem to find a download link on that website. It also seems like there haven&#39;t been any recent developments regarding the project.

I was finally able to find a download link for Vidal&#39;s Boost.Process on an [external site][2] and will use that for now, but I&#39;m quite amazed at the effort I had to put in to get my hands on a cross platform c++ library to interact with external processes.

So, why is there no official Boost.Process? It seems like it would be a very valuable addition. Or am I totally overlooking the obvious solution here? Could you perhaps suggest other cross-platform libraries for managing simple starting of and interation with external processes?

  [1]: http://www.netbsd.org/~jmmv/process/
  [2]: http://www.highscore.de/boost/process/

Where is Boost.Process?

Free of charge, simple to learn/use,  Cross Platform C library for GUI Apps? Am I looking for Qt?

Bonus question: Can I develop with the said library/toolkit on Mac then recompile on PC/Linux?

Super Bonus Question: Link to tutorial and/or download of said library.

The truth is that I&#39;m in the process of catching up on the C family (coming from web development - XHTML/PHP/MySQL) to learn iPhone development. 

I do understand that C is not C++ or ObjectiveC but I want to keep the learning curve as simple as possible. Not to get too off topic, but I am also on the lookout for good starter books and websites. I&#39;ve found [this so far][1].

I&#39;m trying to kill many birds with one stone here. I don understand that there are platform specific extensions, but I will try to avoid those for porting purposes
The idea is that I want to write the code on one machine and just compile thrice. (Mac/Win/Linux) If Objective C will compile on Windows and Linux as well as OS X then that&#39;s good. If I must use C++, that&#39;s also fine. 


  [1]: http://cocoadevcentral.com/articles/000081.php

Cross Platform C library for GUI Apps?

I have created a text file in Unix environment using Java code.

For writing the text file I am using `java.io.FileWriter` and `BufferedWriter`. And for newline after each row I am using `bw.newLine()` method (where `bw` is object of `BufferedWriter`).

And I&#39;m sending that text file by attaching in mail from Unix environment itself (automated that using Unix commands).

My issue is, after I download the text file from mail in a Windows system, if I 
opened that text file the data is not properly aligned. `newline()` character is 
not working, I think so.

I want same text file alignment as it is in Unix environment, if I opened the
text file in Windows environment also.

How do I resolve the problem?

Java code below for your reference (running in Unix environment):

    File f = new File(strFileGenLoc);
    BufferedWriter bw = new BufferedWriter(new FileWriter(f, false));
    rs = stmt.executeQuery(&quot;select * from jpdata&quot;);
    while ( rs.next() ) {
        bw.write(rs.getString(1)==null? &quot;&quot;:rs.getString(1));
        bw.newLine();
    }

  
          
      

Carriage Return\Line feed in Java

I notice that when I load a text file, Notepad++ will recognize and use whatever the newline character in that file is, `\n` or `\r\n`.

Is there some option where I can select which to use in a new document? (I&#39;ve looked in help and googled, but can&#39;t find anything.)

Choose newline character in Notepad++

I have a git repository hosted on github. Many of the files were initially developed on Windows, and I wasn&#39;t too careful about line endings. When I performed the initial commit, I also didn&#39;t have any git configuration in place to enforce correct line endings. The upshot is that I have a number of files with CRLF line endings in my github repository.

I&#39;m now developing partially on Linux, and I&#39;d like to clean up the line endings. How can I ensure the files are stored correctly with LF on github, and have LF in my working copy?

I&#39;ve set up a `.gitattributes` file containing `text eol=LF`; is that correct? With that committed and pushed, can I just `rm` my local repo and re-clone from github to get the desired effect?

Force LF eol in git repo and working copy

Is there any way in Notepad++ (or even with another tool) to change the line ending automatically **on multiple files in one go**?

i.e. convert a mix of windows EOL (`CRLF`) and UNIX EOL (`LF`) files to be all Windows EOL (`CRLF`)

Change EOL on multiple files in one go

In notepad++ there is a toolbar button to switch on/off display of EOL characters, i.e. carriage return and line feed.

Can Sublime Text 2 do the similar thing?
 

Content Type	Original Author	Original Content on Stackoverflow
Question	Alan	View Question on Stackoverflow
Solution 1 - Python	too much php	View Answer on Stackoverflow
Solution 2 - Python	Diego V	View Answer on Stackoverflow

Regular Expression to match cross platform newline characters

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Using a global dictionary with threads in Python

How to use custom font with WebView

Attributions