Using firePHP in firefox to debug PHP

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Debugging PHP pages for a web application may be challenging. However, firePHP, a firefox extension can make debugging PHP pages very simple. Here are the steps to start debugging using firePHP. 1. Install firebug from https://getfirebug.com/downloads. 2. Install the firePHP extension from https://addons.mozilla.org/en-US/firefox/addon/firephp/. The browser is now ready to receive the PHP logs that are sent from … Read more

Tabbed window for Cygwin and Windows command prompt

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Opening up multiple cygwin windows or windows command prompt has annoyed almost every developer who had to do it. This post presents a way to open tabbed cygwin and windows command prompt using Console (http://sourceforge.net/projects/console/) . Here are the steps: Download console2 from http://sourceforge.net/projects/console/. Unzip it and launch console.exe. This should open up a window that … Read more

static imports in java

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Many a times we use static methods or constants in our class. For example if you are writing a math library, there are chances that you would need to use lot of math functions from java.lang.Math. for example to calculate the nth power of x you would do y = Math.pow(x,3); pow is a static … Read more

Redirecting java Standard output and standard error to file

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It is useful to redirect standard java output to a file. However, if you are wondering why your stacktrace from e.printStackTrace() is not being redirected to a file then read on… Say you have a program called RedirectExample.java. To redirect the output to a text file do java RedirectExample > output.txt However, if your code in … Read more

Install Climate Data Operator (CDO) with NetCDF, GRIB2 and HDF5 support

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Building CDO with Netcdf, HDF5 and GRIB2  support. Download CDO from https://code.zmaw.de/projects/cdo/files. On a unix box download using wget-  “wget https://code.zmaw.de/attachments/download/11392/cdo-1.7.0.tar.gz.”  Use the latest verion of cdo. Download NetCDF from http://www.unidata.ucar.edu/downloads/netcdf/index.jsp. Use the C version. On Unix – “wget ftp://ftp.unidata.ucar.edu/pub/netcdf/netcdf-4.3.3.1.tar.gz”. Download Grib API from https://software.ecmwf.int/wiki/display/GRIB/Releases. On unix – “wget https://software.ecmwf.int/wiki/download/attachments/3473437/grib_api-1.14.4-Source.tar.gz?api=v2” Download Jasper from http://www.ece.uvic.ca/~frodo/jasper/#download. On … Read more

Call Javascript from Java – 1

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yes, It is possible to call javascript from java, and the functionality is built right into the JVM!. Here’s a simple way to do it . Lets say you have a javascript called file.js, which has a method called sum(a,b). To call this method from java, do the following: The imports: import javax.script.Invocable; import javax.script.ScriptEngine; … Read more

R – Turorial II

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  NOTE : This tutorial has been superseded by the exhaustive tutorials Here Lists Collection of Objects of same or mixed type.List may also contain vector or other lists. Create a list using the funtion list(). The following example shows operations that can be performed on a list. > alphabets=list(a=”apple”,b=”ball”,c=”cat”) > alphabets $a [1] “apple” $b … Read more

R – Tutorial I

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NOTE : This tutorial has been superseded by the exhaustive R tutorials Here Basics Start R in Windows using the program menu. To quit :  q(). to call help for a function. help([function]) or ?[function]. use double quotes to escape special characters and tokens. e.g. ?”for”. objects() or ls() to obtain list of objects stored. rm([object]) … Read more