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[Python] Best strategy for dealing with incomplete lines of data from a file.

I use the following block of code to read lines out of a file 'f' into a nested list: for data in f: clean_data = data.rstrip() data = clean_data.split('\t') t += [data[0]] strmat += [data[1:]] Sometimes, however, the data is incomplete and a row may look like this: ['955.159', '62.8168', '', '', '', '', '', ''...

Trimming lists using a loop

I have few lists like: a = [1, 2, 3, 4, 5] b = [4, 6, 5, 9, 2] c = [4, 7, 9, 1, 2] I want to trim all of them using a loop, instead of doing as below: a[-2:] b[-2:] c[-2:] I tried but got confused with pass by value or pass by reference fundamentals, looked into other questions as well but no help. Thanks ...

Find missing number in sequence in set or list

If a std::set or std::list contains a sequence of natural numbers (1, 2, 3..). would there be a function in standard library to find the missing number? ...

How slow is Python's string concatenation vs. str.join?

As a result of the comments in my answer on this thread, I wanted to know what the speed difference is between the += operator and ''.join() So what is the speed comparison between the two? ...

How to remove characters from Python list?

I have a LIST: ['tag1', 'tag2', 'tag3 tag3', ...] How do I delete [, ], '. I want to get a string: "tag1, tag2, tag3 tag3, ..." ...

Utility of List<T>.Sort() versus List<T>.OrderBy() for a member of a custom container class

I've found myself running back through some old 3.5 framework legacy code, and found some points where there are a whole bunch of lists and dictionaries that must be updated in a synchronized fashion. I've determined that I can make this process infinitely easier to both utilize and understand by converging these into custom container cl...

jQuery UI Drag/Drop does not work in FF

I've been looking all over the place, but I haven't landed an answer yet. Is the current jQuery UI 1.8-1.8.2 supports Firefox 3+? I have 3.6.3 installed, but the example on their websites works for my IE7, IE8, Chrome, but not Firefox. http://jqueryui.com/demos/sortable/#connect-lists Is anyone else having this problem? It is not PC s...

How do I get user input to refer to a variable in Python?

I would like to get user input to refer to some list in my code. I think it's called namespace? So, what would I have to do to this code for me to print whatever the user inputs, supposing they input 'list1' or 'list2'? list1 = ['cat', 'dog', 'juice'] list2 = ['skunk', 'bats', 'pogo stick'] x = raw_input('which list would you like me t...

How can I convert a C# list into something that's hashable?

I want something along the lines of Python's tuples (or, for sets, frozensets), which are hashable. I have a List<String> which is most certainly not hashing correctly (i.e. by value). ...

How to set variable size for List control item in Flex?

The following code display a list of comments using List control. The item height set to a fixed value (150), so it seems working: if the content is too long, the scrollbar shows... However, what I really want is not to set the height but let it to change according to the content size. Is there any way to accomplish this? <mx:...

Deferred execution of List<T> using Linq

Say I have a List<T> with 1000 items in it. Im then passing this to a method that filters this List. As it drops through the various cases (for example there could be 50), List<T> may have upto 50 various Linq Where() operations performed on it. Im interested in this running as quickly as possible. Therefore, i dont want this List<T> f...

Background images in <a> tag inside <li> tag not dissapears in IE6 and IE7

Hi Guys, In IE7 and in IE6, I have an anchor inside of an li which has a background image in it. When you mouse over these links, the backagound images go missing in these browsers. Any ideas as to why this would happen? Here's an example (IE7 and IE6): http://bit.ly/dekwva Many thanks, James ...

PHP list of specific files in a directory

The following code will list all the file in a directy <?php if ($handle = opendir('.')) { while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { $thelist .= '<LI><a href="'.$file.'">'.$file.'</a>'; } } closedir($handle); } ?> <P>List of files:</p>...

Sharepoint lists IDs - possible to update it?

Is it possible to change the ID of a list with Sharepoint? With a feature or something like that? ...

Can you treat a string as one object in a list in MATLAB?

I would like to make a list of strings in MATLAB using the example below: x = ['fun', 'today', 'sunny'] I want to be able to call x(1) and have it return 'fun', but instead I keep getting 'f'. Also, is there a way to add a string to a list without getting the list giving back a number where the string should be? I have tried using st...

How can I remove duplicates in an array but keep the same order?

I have this cell array in MATLAB: y = { 'd' 'f' 'a' 'g' 'g' 'a' 'w' 'h'} I use unique(y) to get rid of the duplicates but it rearranges the strings in alphabetical order: >> unique(y) ans = 'a' 'd' 'f' 'g' 'h' 'w' I want to remove the duplicates but keep the same order. I know I could write a function do do this bu...

Convert List of one type to Array of another type using Dozer

I'm wondering how to convert a List of one type to an array of another type in Java using Dozer. The two types have all the same property names/types. For example, consider these two classes. public class A{ private String test = null; public String getTest(){ return this.test } public void setTest(String test){...

Haskell Convert List to List of Tuples

Hello, i have a list like this ["peter","1000","michell","2000","kelly","3000"] and i would like to convert to [("peter",1000),("michell", 2000),("kelly",3000)] Please help. Thanks. ...

Erlang - list comprehensions - populating records

I have a simple record structure consisting of a header (H) and a list of the data lines (D) 1:N. All header lines must start with a digit. All data lines have a leading whitespace. There also might be some empty lines (E) in between that must be ignored. L = [H, D, D, E, H, D, E, H, D, D, D]. I would like to create a list of record...

How to remove all the Null elements inside a generic List in one go?

Hi, Is there a default method defined in .Net for C# to remove all the elements within a list which are NULL? List<EmailParameterClass> parameterList = new List<EmailParameterClass>{param1, param2, param3...}; Lets say some of the paramters are NULL; I cannot know in advance and I want to remove them from my list so that it only cont...