If you find pages in Adobe Reader fading out as shown below, then it means the 2D acceleration API is not functioning as expected.
You may want to turn it off to get rid of the above effect. Now goto the preferences page in the Reader and select Page Display section. Unselect the choice box shown below.
That should solve your problem.
After reading this post I thought of comparing the performance of python against the lightweight scripting language Lua. So to have a fair comparison I ported the MorseCode encoder/decoder wirtten in python into a Lua script with no change to the logic or the sequence.
--morse code table
codes = {
['!'] = "-.-.--", [' '] = "|", ['"'] = ".-..-.", ['$'] = "...-..-",
['\''] = ".----.", ['&'] = ".-...", [')'] = "-.--.-", ['('] = "-.--.",
['+'] = ".-.-.", ['-'] = "-....-", [','] = "--..--", ['/'] = "-..-.",
['.'] = ".-.-.-", ['1'] = ".----", ['0'] = "-----", ['3'] = "...--",
['2'] = "..---", ['5'] = ".....", ['4'] = "....-", ['7'] = "--...",
['6'] = "-....", ['9'] = "----.", ['8'] = "---..", [';'] = "-.-.-",
[':'] = "---...", ['='] = "-...-", ['?'] = "..--..", ['A'] = ".-",
['@'] = ".--.-.", ['C'] = "-.-.", ['B'] = "-...", ['E'] = ".",
['D'] = "-..", ['G'] = "--.", ['F'] = "..-.", ['I'] = "..",
['H'] = "....", ['K'] = "-.-", ['J'] = ".---", ['M'] = "--",
['L'] = ".-..", ['O'] = "---", ['N'] = "-.", ['Q'] = "--.-",
['P'] = ".--.", ['S'] = "...", ['R'] = ".-.", ['U'] = "..-",
['T'] = "-", ['W'] = ".--", ['V'] = "...-", ['Y'] = "-.--",
['X'] = "-..-", ['Z'] = "--..", ['_'] = "..--.-"
}
binary = {['.']="10",['-']="1110",[',']="000",['|']="0000000"}
function encode(value)
--encodes the value into morse code
value = string.upper(value)
value = string.gsub(value,'%*', 'X')
value = string.gsub(value,'%^', 'XX')
local morse_value=""
local length = string.len(value)
local i = 1
while i <= length do
local chr = string.sub(value,i,i)
if chr then
morse_value = morse_value .. codes[chr] .. ","
end
i = i + 1
end
return _get_binary(morse_value)
end
function _get_binary(value)
local binary_value = ""
local length = string.len(value)
local i = 1
while i <= length do
local chr = string.sub(value,i,i)
if chr then
binary_value = binary_value .. binary[chr]
end
i = i + 1
end
return binary_value
end
function decode(morse_code_value)
-- decodes the morse bytes
decoded_value = _decode_binary(morse_code_value)
ascii_value=""
for w in string.gfind(decoded_value, "[-.|]+") do
ascii_value = ascii_value .. _get_key(w)
end
return ascii_value
end
function _get_key(value)
--returns the key for the given value
for k, v in next, codes do
if v == value then
return k
end
end
return ''
end
function _decode_binary(binary)
dah_replaced = string.gsub(binary,'1110', '-')
dit_replaced = string.gsub(dah_replaced,'10', '.')
comma_replaced = string.gsub(dit_replaced,'000', ',')
zero_replaced = string.gsub(comma_replaced,'0', '|,')
return zero_replaced
end
function print_usage()
print("Usage : "..arg[0].." [d (decode) |e (encode)] [input string]")
end
if arg[1] == nil then
print_usage()
else
if arg[1] == 'd' then
print("Decoded value : "..decode(arg[2]))
elseif arg[1] == 'e' then
if arg[2] == nil then
print_usage()
else
print("Encoded value : "..encode(arg[2]))
end
else
print("Encoded value : "..encode(arg[1]))
end
end
This is a Morse code encoder/decoder program written in python. Simply pass a string that contains Morse code supported characters and you'll see a binary format of the string, encoded as Morse code as specified @ http://en.wikipedia.org/wiki/Morse_code.
#!/usr/bin/python
import sys
__author__="Aanand Natarajan"
#morse code dictionary
codes = {'1':".----",'2':"..---",'3':"...--",'4':"....-",'5':".....",'6':"-....",'7':"--...",'8':"---..",
'9':"----.",'0':"-----",'A':".-",'B':"-...",'C':"-.-.",'D':"-..",'E':".",'F':"..-.",'G':"--.",
'H':"....",'I':"..",'J':".---",'K':"-.-",'L':".-..",'M':"--",'N':"-.",'O':"---",'P':".--.",
'Q':"--.-",'R':".-.",'S':"...",'T':"-",'U':"..-",'V':"...-",'W':".--",'X':"-..-",'Y':"-.--",
'Z':"--..",
#punctuations
',':"--..--",'.':".-.-.-",'?':"..--..",';':"-.-.-",':':"---...",'/':"-..-.",
'-':"-....-","'":".----.",'(':"-.--.",')':"-.--.-",'!':"-.-.--",'&':".-...",
'=':"-...-",'+':".-.-.",'_':"..--.-",'"':".-..-.",'$':"...-..-",'@':".--.-.",
#space
' ':"|"}
binary = {'.':'10','-':'1110',',':'000','|':'0000000'}
def encode(value):
""" encodes the value into morse code """
morse_value=""
value.replace('*', 'X')
value.replace('^', 'XX')
for c in value:
try :
morse_value += codes[c.upper()]+','
except :
print "Unintended character " + c + " omitted"
return _get_binary(morse_value)
def decode(morse_code_value):
""" decodes the morse bytes """
decoded_value = _decode_binary(morse_code_value)
ascii_value=""
for v in decoded_value.split(","):
ascii_value += _get_key(v)
return ascii_value
def _get_binary(value):
binary_value = ""
for c in value:
binary_value += binary[c]
return binary_value
def _get_key(value):
""" returns the key for the given value """
for k,v in codes.items():
if v == value:
return k
return ''
def _decode_binary(binary):
dah_replaced = binary.replace('1110', '-')
dit_replaced = dah_replaced.replace('10', '.')
comma_replaced = dit_replaced.replace('000', ',')
zero_replaced = comma_replaced.replace('0', '|,')
return zero_replaced
def _do_decode(value):
print "Decoded : "+decode(value)
def _do_encode(value):
print "Encoded : "+encode(value)
if __name__ == "__main__":
if len(sys.argv) > 2:
if sys.argv[1] == 'd' :
print "decoding"
_do_decode(sys.argv[2])
else:
print "encoding"
_do_encode(sys.argv[2])
elif len(sys.argv) > 1:
print "encoding"
_do_encode(sys.argv[1])
else:
print "Usage : "+sys.argv[0]+" [d (decode) |e (encode)] [input string]"
aanand@AanandDL:~$ ./MorseEnDecode.py "aanand aka tuxaanand"
encoding
Encoded : 101110000101110000111010000101110000111010000111010
1000000000000001011100001110101110000101110000000000000011100
0010101110000111010101110000101110000101110000111010000101110
00011101000011101010000
aanand@AanandDL:~$ ./MorseEnDecode.py d "1011100001011100001110
100001011100001110100001110101000000000000001011100001110101110
000101110000000000000011100001010111000011101010111000010111000
010111000011101000010111000011101000011101010000"
decoding
Decoded : AANAND AKA TUXAANAND
aanand@AanandDL:~$
After a long time, again with the same problem but using a different language. I have been watching the talks on Erlang - about its strength and stability. I thought why not give it a try.
This is the same numerology problem written in Erlang.
-module(numero).
-export([value/1,start/1]).
start(Args) -> value(lists:nth(1,Args)).
value(NAME) -> io:write(sum(0,lists:sum([val(A) || A <- NAME]))),io:nl(),halt().
sum(SUM,NUM) when NUM > 0 -> Q = NUM,
R = Q rem 10,
NEWQ = Q div 10,
sum(SUM + R,NEWQ);
sum(SUM,0) ->
if
SUM > 9 -> sum(0,SUM);
true -> SUM
end.
val(C) ->
if
(($A =:= C) or ($J =:= C) or ($I =:= C) or ($Y =:= C) or ($Q =:= C)) -> 1;
(($B =:= C) or ($K =:= C) or ($R =:= C)) -> 2;
(($S =:= C) or ($C =:= C) or ($L =:= C) or ($G =:= C)) -> 3;
(($T =:= C) or ($D =:= C) or ($M =:= C)) -> 4;
(($E =:= C) or ($N =:= C) or ($X =:= C) or ($H =:= C)) -> 5;
(($U =:= C) or ($V =:= C) or ($W =:= C)) -> 6;
(($O =:= C) or ($Z =:= C)) -> 7;
(($F =:= C) or ($P =:= C)) -> 8;
true -> 0
end.
In Netbeans there is an option to run the current file. It works fine until we need the option to set a JVM argument.
I hit the same problem and was searching the build xml for target that runs the file and customize it. But accidentally found a property runmain.jvmargs in project.properties file and set the JVM args that i wanted and it worked.
--> {project}/nbproject/project.properties (runmain.jvmargs)
This also works for web projects.
This is a simple Numerology calculator written in ruby. Just a pass time program while learning ruby.
This will give you the value of the given name and date (date of birth)
Usage:
./numerology.rb <your_name> <date> <month> <year>
#!/usr/bin/env ruby
class Numerology
@name
@date
@month
@year
$map = {'A' => 1, 'J' =>1, 'I' =>1, 'Y' => 1, 'Q' => 1,
'B' => 2, 'K' => 2, 'R' => 2,
'S' =>3, 'C' =>3, 'L' =>3, 'G' => 3,
'T' => 4, 'D' => 4, 'M' => 4,
'E' =>5, 'N' => 5, 'X' =>5, 'H' => 5,
'U' => 6, 'V' => 6, 'W'=>6,
'O' =>7, 'Z' => 7,
'F' =>8, 'P' => 8 ,
' ' => '' #for removing spaces
}
def initialize(name,date,month,year)
if name.nil? or name.empty?
raise "Please provide a name"
end
@name = name.upcase
@date = date.to_i
@month = month.to_i
@year = year.to_i
if @date == 0 or @month == 0 or @year == 0
raise "Please provide a valid date"
end
end
def calculate
puts "Name : #{@name} \n"
puts "Date : #{@date}/#{@month}/#{@year} \n"
sum = 0
#old version
#~ Range.new(0,@name.length).each do|n|
#~ #puts "char at #{n} = #{@name[n]}"
#~ #print @name[n]
#~ case @name[n]
#~ when ?A , ?J , ?I , ?Y , ?Q then sum = sum + 1
#~ when ?B , ?K , ?R then sum = sum + 2
#~ when ?S , ?C, ?L, ?G then sum = sum +3
#~ when ?T, ?D, ?M then sum = sum +4
#~ when ?E, ?N, ?X, ?H then sum = sum + 5
#~ when ?U, ?V, ?W then sum = sum + 6
#~ when ?O, ?Z then sum = sum + 7
#~ when ?F, ?P then sum = sum +8
#~ end
#~ while sum > 9
#~ sum = sum_digits(sum)
#~ end
#~ end
#replace the chararcters with thier numberic equivalent
#map contains key value pairs - A : 1, B : 2....
#replace each char (key in map) in the string with the value from the map
$map.each do |k,v|
@name.gsub!(k, v.to_s)
end
#find the sum of digits until the sum is single digit
sum = @name.to_i
while sum > 9
sum = sum_digits(sum)
end
#calculate sum value for date of birth
dateSum = @date + @month + @year
while dateSum > 9
dateSum = sum_digits(dateSum)
end
print "Name value :#{sum}\n"
print "Date value :#{dateSum}\n"
end
private
#sum the digits of the given number
def sum_digits(num)
sum = 0
quotient = num
while quotient > 0
#puts "sum : #{sum}, reminder: #{reminder}, quotient: #{quotient}"
reminder = quotient % 10
quotient = quotient / 10
sum = sum + reminder
end
return sum
end
end
if __FILE__ == $0
begin
num = Numerology.new(ARGV[0],ARGV[1],ARGV[2],ARGV[3])
num.calculate
rescue => ex
puts "Error : #{ex.message}"
end
end
I have been looking for an open source feature rich IDE for dynamic languages such as Python, ruby and Javascript. Now that ActiveState has released an opensource version of its Komodo, that may be become a primary choice for dynamic languages.
http://www.activestate.com/Products/komodo_ide/komodo_edit.mhtml
No more pydev - a huge junk of java for editing python files.
Thanks a lot ActiveState....
DataGrids displaying a huge set of data with header for each column would be better usable with its header row frozen.
Plain HTML tables, with frozen header are very simple to create.
package name.aanand.magix.client;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.Widget;
public class DataGrid extends FlexTable {
private Element head;
private Element headerTr;
public DataGrid() {
super();
head = DOM.createTHead();
headerTr = DOM.createTR();
DOM.insertChild(this.getElement(), head, 0);
DOM.insertChild(head, headerTr, 0);
Element tBody = getBodyElement();
DOM.setElementAttribute(tBody, "style", "overflow:auto;text-align: left;");
DOM.setElementAttribute(head, "style", "text-align: left;");
}
public void setHeight(String height) {
DOM.setElementAttribute(getBodyElement(), "height", height);
}
public void setHeader(int column,String text){
prepareHeader(column);
if (text != null) {
DOM.setInnerText(DOM.getChild(headerTr, column), text);
}
}
private void prepareHeader(int column) {
if (column < 0) {
throw new IndexOutOfBoundsException(
"Cannot create a column with a negative index: " + column);
}
int cellCount = DOM.getChildCount(headerTr);
int required = column + 1 - cellCount;
if (required > 0) {
addCells(head, 0, required);
}
}
public void setHeaderWidget(int column, Widget widget) {
prepareHeader(column);
if (widget != null) {
widget.removeFromParent();
// Physical attach.
DOM.appendChild(DOM.getChild(headerTr, column), widget.getElement());
adopt(widget);
}
}
private native void addCells(Element table, int row, int num)/*-{
var rowElem = table.rows[row];
for(var i = 0; i < num; i++){
var cell = $doc.createElement("td");
rowElem.appendChild(cell);
}
}-*/;
IE fails to parse <script> content if its in XHTML shorthand format that is <script src="some.js" type="text/javascript" />.
But works fine in Firefox and other mozilla based browsers.
To fix this one has expand the tag as follows:
<script src="some.js" type="text/javascript">
</script>
I checked it with IE 6, may be in version 7 it could be working..
Blogged with Flock
Recently I and my friend came across a silly bug that took nearly half a day for us to find a solution for it. The bug that i encountered is with the GWTCompiler.
We had some compilation problems when we started writing an Async interface for one of our services. The error log said that the
It pointed out at some line and read com.google was not resolved. But the snapshot of the file was pretty clean and had no errors.
At first i thought it was some classpath problem, but after fighting and struggling with it for about 2 hours or so my friend suddenly popped up with a doubt, eyeing at the Async interface's method which had a parameter named com.
That's it; it is not able to resolve packages, if there is any variable declared with same name as the package.
For example
//imports
public interface MyServiceAsync{
public void save(SomeType com, CallBack c);
}
factory = (Factory) GWT.create(ReflectiveFactory.class);
1 package name.aanand.gwt.generator;
2
3 import java.io.PrintWriter;
4
5 import com.google.gwt.core.ext.Generator;
6 import com.google.gwt.core.ext.GeneratorContext;
7 import com.google.gwt.core.ext.TreeLogger;
8 import com.google.gwt.core.ext.UnableToCompleteException;
9 import com.google.gwt.core.ext.typeinfo.JClassType;
10 import com.google.gwt.core.ext.typeinfo.NotFoundException;
11 import com.google.gwt.core.ext.typeinfo.TypeOracle;
12 import com.google.gwt.user.rebind.ClassSourceFileComposerFactory;
13 import com.google.gwt.user.rebind.SourceWriter;
14
15 public class FactoryGenerator extends Generator {
16
17 public String generate(TreeLogger logger, GeneratorContext context,
18 String typeName) throws UnableToCompleteException {
19 logger.log(TreeLogger.INFO, "Generating source for " + typeName, null);
20 TypeOracle typeOracle = context.getTypeOracle();
21
22 JClassType clazz = typeOracle.findType(typeName);
23 if (clazz == null) {
24 logger.log(TreeLogger.ERROR, "Unable to find metadata for type '"
25 + typeName + "'", null);
26 throw new UnableToCompleteException();
27 }
28
29 try {
30 logger.log(TreeLogger.INFO, "Generating source for "
31 + clazz.getQualifiedSourceName(), null);
32
33 JClassType reflectableType = typeOracle
34 .getType("name.aanand.gwt.client.Instantiable");
35 SourceWriter sourceWriter = getSourceWriter(clazz, context, logger);
36 if (sourceWriter != null) {
37 sourceWriter.println("public "
38 + reflectableType.getQualifiedSourceName()
39 + " newInstance(String className) {");
40 JClassType[] types = typeOracle.getTypes();
41 int count = 0;
42 for (int i = 0; i < types.length; i++) {
43 if (types[i].isInterface() == null
44 && types[i].isAssignableTo(reflectableType)) {
45 if (count == 0) {
46 sourceWriter.println(" if(\""
47 + types[i].getQualifiedSourceName()
48 + "\".equals(className)) {"
49 + " return new "
50 + types[i].getQualifiedSourceName() + "();"
51 + "}");
52 } else {
53 sourceWriter.println(" else if(\""
54 + types[i].getQualifiedSourceName()
55 + "\".equals(className)) {"
56 + " return new "
57 + types[i].getQualifiedSourceName() + "();"
58 + "}");
59 }
60 count++;
61 }
62 }
63 sourceWriter.println("return null;");
64 sourceWriter.println("}");
65 sourceWriter.commit(logger);
66 logger.log(TreeLogger.INFO, "Done Generating source for "
67 + clazz.getName(), null);
68 return clazz.getQualifiedSourceName() + "Wrapper";
69 }
70 } catch (NotFoundException e) {
71 e.printStackTrace();
72 }
73 return null;
74
75 }
76
77 public SourceWriter getSourceWriter(JClassType classType,
78 GeneratorContext context, TreeLogger logger) {
79
80 String packageName = classType.getPackage().getName();
81 String simpleName = classType.getSimpleSourceName() + "Wrapper";
82 ClassSourceFileComposerFactory composer = new ClassSourceFileComposerFactory(
83 packageName, simpleName);
84 composer.addImplementedInterface("name.aanand.gwt.client.Factory");
85 PrintWriter printWriter = context.tryCreate(logger, packageName,
86 simpleName);
87 if (printWriter == null) {
88 return null;
89 } else {
90 SourceWriter sw = composer.createSourceWriter(context, printWriter);
91 return sw;
92 }
93 }
94
95 }
96
These are very simple key-mappings for VIM 7.0 and above, to play with tabs (or tab pages).
This a product of my last two or three weekends. It actually began as a duplicate file finder and has grown upto a source code search tool powered by Ctags the famaous code indexing utility.
The duplicate finder works based on file hashes using the Tiger Hash algorithm (BouncyCastle's impl).
The Code search is simply a UI to search Ctags tag files in each of your configured code repositories.
I just had to write some code for running a single servlet for testing and wrote this java program which uses Embedded tomcat.
The following code doesn't use web.xml to configure the context. Context configuration is done programmatically using the StandardContext class in catalina.jar. I have added a servlet and mapped it to the URL "/example".
Embedded embedded = new Embedded();
Engine engine = null;
Host host = null;
// Create an embedded server
embedded = new Embedded();
// print all log statments to standard error
embedded.setDebug(0);
embedded.setLogger(new SystemOutLogger());
// Create an engine
engine = embedded.createEngine();
engine.setDefaultHost("localhost");
// Create a default virtual host
host = embedded.createHost("localhost", "./");
engine.addChild(host);
StandardContext context = (StandardContext) embedded.createContext("/ContextPath","/test");
context.setWorkDir("./test");
context.setConfigured(true);
Wrapper servlet = context.createWrapper();
servlet.setServletClass(ExampleServlet.class.getName());
servlet.setName("example");
context.addChild(servlet);
context.addServletMapping("/example", "example");
host.addChild(context);
host.setAutoDeploy(true);
// Install the assembled container hierarchy
embedded.addEngine(engine);
// Assemble and install a default HTTP connector
Connector connector = embedded.createConnector("127.0.0.1", 8080,
false);
embedded.addConnector(connector);
// Start the embedded server
embedded.start()
java -Xbootclasspath/p:<aop boot classpath as described> \
-Djboss.aop.path=<path to jboss-aop.xml> \
-classpath <path to your classes> com.blah.MyMainClass
I have been search, playing with and reviewing a number of text editors and now i have planned to roll out my own editor called MyMate soon.
This will be a project where i will learn advance C++ and I'm gonna enjoy using JUCE. The project is an inspiration from the wonderful editor TextMate.
This is an initial screen of MyMate(just started to work on it)
I'm not a very good C++ programmer, so i would like someone to guide me and help me in this project.
Anybody interested to help me, just add comment and we'll start a project with a repository in SourceForge.
This is my dark colour scheme for VIM, which is based on rdark colour scheme. I have done some colour changes to
Download colour schemeSlippery Snippets brings the HOT HOT feature of TextMate to VIM. Define you snippet in snippets file and use the snippets with a single <TAB
Just download the VIMBALL file and load it in VIM. Then use the sourcing command to extract it.
:so %
The content will be extracted to appropriate locations in the VIM's directory. Now, open a C++ source file and type "do"; then hit the
{ Note: Snippet files can be found at "vim/vimfiles/after/ftplugin". Refer the snippets files for creating your own snippets.}
Enjoy the Snippets!
CrimsonEditor is a very clean, simple and lightweight editor for windows. And for a very long time there was no development. But now a team has come up with an idea to build cross platform editor using wxWindows and they call it EmeraldEditor.
I don't think i would be as light as Crimson, because WxWidgets is a huge and heavy library and makes the application a bit bloated.
Lets wait and check it out.
