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• How to change verbose code in Ruby to simpler code using Metaprogramming?

  - by Jian Lin

  It is said that Ruby is a metaprogramming language. I wonder if the first 3 lines can be made less verbose using metaprogramming? RUBY_VERSION ||= "unknown version" RUBY_PATCHLEVEL ||= "unknown patchlevel" RUBY_PLATFORM ||= "unknown platform" print "Ruby ", RUBY_VERSION, " patch ", RUBY_PATCHLEVEL, " on ", RUBY_PLATFORM

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• Perl: Printing without a newline

  - by synapz

  I have a computationally expensive task in perl, and would like to inform the user that computation is ongoing by printing out a period after each portion of the computation is completed. Unfortunately, until I print a "\n", none of my periods are printed. How can I address this?

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• how to get post content with groovy listening on a port?

  - by Amir Raminfar

  I wrote the following simple groovy code that handles a request. if (init) data = "" if (line.size() > 0) { data += "--> " + line + "\n" } else { println "HTTP/1.1 200 OK\n" println data println "----\n" return "success" } I then run it by doing groovy -l 8888 ServerTest.groovy However, it doesn't seem to print any POST data. I am testing it by doing curl -d "d=test" http://localhost:8888/ Does anybody know how to get that data in groovy?

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• Python: Multi list comprehension, is there such an unwieldy beast of prey ?

  - by bandana

  consider the following python 'code'. it demonstrates the concept of a multi-list comprehension: start = ['a', 'b', 'c'] middle = ['r', 'a', 'a'] finish = ['t', 'r', 't'] l = [s.upper() + m + f for s in start, m in middle, e in finish] >>> print l ['Art', 'Bar', 'Cat'] Alas, the above code does not work in python. What would be a good approximation of multi-list comprehension in python? Please discuss what happens when the lists have different lengths.

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• How to copy image of a chart from Silverlight application to clipboard

  - by zidane

  I have Silverlight 3.0 applications with some custom graphic and some charts. I need to find a best way to transfer this graphic to PowerPoint presentation. I`we read that Silverlight 4.0 offers new Clipboard API, but there is only support for Unicode-text, not images. Is there a way to achieve this task without forcing user to manually print screen and than paste to other applicatons.

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• How can I get ranges from a list of integers in Perl?

  - by Suezy

  I have an array of numbers: @numbers = 1,2,3,6,8,9,11,12,13,14,15,20 and I want to print it this way: 1-3,6,8-9,11-15,20 Any thoughts? Of course I tried using the most common "looping", but still didn't get it.

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• Count number of occurrences of a pattern in a file (even on same line)

  - by jrdioko

  When searching for number of occurrences of a string in a file, I generally use: grep pattern file | wc -l However, this only finds one occurrence per line, because of the way grep works. How can I search for the number of times a string appears in a file, regardless of whether they are on the same or different lines? Also, what if I'm searching for a regex pattern, not a simple string? How can I count those, or, even better, print each match on a new line?

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• Groovy metaprogramming

  - by Don

  I expect this code fragment to print "ddddd" String.metaClass.toString = {-> "ddddd" } "fff".toString() But it prints "fff", why?

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• variables reference value of string

  - by xdevel2000

  How can I get the reference value of a string object? If I hava a class like class T() { } T t = new T(); System.out.println( t); print out T@a3455467 that is the reference value inside t but for string? maybe with method hashCode()??

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• Generating XPS document from a Windows Application

  - by suecnus

  I want to capture the html content in web browser and print to XPS Document. I am using a Windows application to do it since it is used in IE toolbar. Is there a way to capture the httpwebrequest to read the content of the webpage to to a FixedDocument object or other through other ways so that it can be converted to an XPSDocument?

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• How to return string name of calling method?

  - by keruilin

  Right now my code works as such: def method_a self.method_b ==> 'method_b' end def method_b puts self.name_of_calling_method end def name_of_calling_method if /`(.*)'/.match(caller.first) return $1 else return nil end end Instead of method_b printing 'method_b', how can I print the name of the calling method - 'method_a'?

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• Adding an object to another module's globals in python

  - by noam

  I know this is very evil, but is it possible to add an object to another module's globals, something like: #module dog.py import cat cat.globals.addVar('name','mittens') and #module cat.py print name #mittens

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• Name and parameters of parent function

  - by zaf

  I'm trying to figure out how to get the name and parameters of a parent function. Example: function foo($a,$b){ bar(); } function bar(){ // Magic Print } foo('hello', 'world'); Output: foo('hello','world') Any tips?

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• rand (0,9) in php?

  - by aamir Fayyaz

  i am using rand function, but a problem is, when new value print old valu not remove, means new value over write on old value?

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• I am validating for RegEx errors -- how can I return which keyword, it failed on?

  - by Trip

  I'm passing new objects through this set of regex : (?i)exp\s|(?i)expire\s|(?i)print|(?i)mention|(?i)spring|(?i)summer|(?i)winter|(?i)jan(\s|\.)|(?i)january|(?i)february|(?i)feb(\.|\s)|(?i)march|mar(\.|\s)|(?i)april|(?i)june|(?i)july|(?i)august|(?i)aug(\s|\.)|(?i)september|(?i)sept(\.|\s)|(?i)november|(?i)nov(\.|\s)|(?i)december|(?i)dec(\.|\s)|(?i)holiday|(?i)christmas|(?i)holloween|(?i)easter|(?i)season|(?i)ends|(?i)end If it errors, for example on the word christmas , how can I dynamically pull the word it errors on, and display it as the cause of the error?

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• Perl: reference to subroutine in external .pm file

  - by Pmarcoen

  I'm having some trouble figuring out how to make a reference to a subroutine in an external .pm file. Right now, I'm doing this : External file package settingsGeneral; sub printScreen { print $_[0]; } Main use settingsGeneral; my $printScreen = settingsGeneral::printScreen; &$printScreen("test"); but this result into an error: Can't use string ("1") as a subroutine ref while "strict refs" in use

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• Google app engine How to count SUM from datestore?

  - by Alon

  Hey, Im wondering, how can i get a SUM of a rating entity i get from the datastore (python)? should i: ratingsum = 0 for rating in ratings: ratingsum + rating print ratingsum ?

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• How to change verbose code in Ruby to simpler using Metaprogramming?

  - by Jian Lin

  It is said that Ruby is a metaprogramming language. I wonder if the first 3 lines can be made less verbose using metaprogramming? RUBY_VERSION ||= "unknown version" RUBY_PATCHLEVEL ||= "unknown patchlevel" RUBY_PLATFORM ||= "unknown platform" print "Ruby ", RUBY_VERSION, " patch ", RUBY_PATCHLEVEL, " on ", RUBY_PLATFORM

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• python how to find the median of a list

  - by user3450574

  I'm trying to write a function named median that takes a list as an input and returns the median value of the list. I'm working with Python 2.7.2 The list can be of any size and the numbers are not guaranteed to be in any particular order. If the list contains an even number of elements, the function should return the average of the middle two. This is the code I'm starting with: def median(list): print(median([7,12,3,1,6,9]))

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• loading other scripts from a groovy script?

  - by IttayD

  How can I load other scripts from within a groovy script? In particular, I want this: in file A.groovy: def say(String msg) { println(msg) } say("hi") in file B.groovy: load("A.groovy") say("bye") running 'groovy B.groovy' should print hi bye

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• C newbie malloc question

  - by roufamatic

  Why doesn't this print 5? void writeValue(int* value) { value = malloc(sizeof(int)); *value = 5; } int main(int argc, char * argv) { int* value = NULL; writeValue(value); printf("value = %d\n", *value); // error trying to access 0x00000000 } and how can I modify this so it would work while still using a pointer as an argument to writeValue?

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• Is there a way that I can force mod_perl to re-use buffer memory?

  - by Pavel Georgiev

  Hi, I have a Perl script running in mod_perl that needs to write a large amount of data to the client, possibly over a long period. The behavior that I observe is that once I print and flush something, the buffer memory is not reclaimed even though I rflush (I know this can't be reclaimed back by the OS). Is that how mod_perl operates and is there a way that I can force it to periodically free the buffer memory, so that I can use that for new buffers instead of taking more from the OS?

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• What's the equivalent to "method reference" in Ruby

  - by Oscar Reyes

  for instance in python it is possible to assign a method to a variable: class MyClass def myMethod(self): return "Hi" x = MyClass() method = x.myMethod print method() # prints Hi I know this should be possible in Ruby, but I don't know what's the syntax.

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• How to hide all buttons in IE6 without hiding all inputs in a printing stylesheet?

  - by Dave

  Hi guys, Whats the easiest method of hiding all buttons but not all inputs (say drop down lists, text input boxes) in CSS that works with IE6. The purpose of this CSS file is for printing (using the media="Print" tag in the HTML).

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• Handling extra newlines in csv files parsed with Python?

  - by rmihalyi

  I have a CSV file that contains extra newlines in some fields, e.g.: A, B, C, D, E, F 123, 456, tree , very, bla, indigo I tried the following: import csv catalog = csv.reader(open('test.csv', 'rU'), delimiter=",", dialect=csv.excel_tab) for row in catalog: print "Length: ", len(row), row and the result I got was this: Length: 6 ['A', ' B', ' C', ' D', ' E', ' F'] Length: 3 ['123', ' 456', ' tree'] Length: 4 [' ', ' very', ' bla', ' indigo'] Does anyone have any idea how I can quickly remove extraneous newlines? Thanks!

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