This is the error message: Error 6 initializing SQL*Plus SP2-0667: Message... It might be that the ORACLE_HOME environment variable is not properly set or a missing sp1<lang>.msb (for example sp1us.msb ) file. But for my Ubuntu system, there was no such thing as sp1<lang>.msb , and it wasn't caused by a missing ORACLE_HOME . The error was resolved after I restored the shared library file libsqlplusic.so .

This is a series of notes on building custom JSF 2.0 facelet taglibs, ordered from the simplest to the less simple. Hopefully it can help you to get started on how to build custom taglibs for JSF. A simple JSF facelets taglib example The simplest taglib I can think of. Using EL expression with a custom tag Make tag attributes dynamic. Mixing custom tag with facelet ui taglibs Discover things you might run into when you get into more details. Which EL context to use? Using the wrong EL context can lead to subtle bugs. JSF facelet taglib backed by a UI component A UIComponent can be a tag handler, without being TagHandler . Using tag handler, UI component and renderer with a JSF facelet...

Experts may disagree but I found it absolutely stunning that JSF EL does not provide an operator for string concatenation. The Java "+" operator is there for the take. Java, which is a strongly typed compiled language, overloads the "+" operator in such a way that any object can be concatenated with a string. But JSF EL, which definitely isn't as strongly typed as Java, restricts the "+" operator to numerical values only! Of course, experts may argue that the "+" operator overloading is a huge design flaw of the Java language. But even so, JSF EL is not the right place to fix it! In some cases, a concatenation operator isn't needed, for example: <ui:repeat var="tab" value="#{tabs}"> <img ... But in case the concatenated...

The bash environment variable PROMPT_COMMAND contains a regular bash command that is executed just before the command prompt is displayed. For example: $ export PROMPT_COMMAND=a bash: a: command not ... The command a is not valid so you get the error message every time you hit enter. Echo something before $PS1 : $ export PROMPT_COMMAND='echo -n Hi!' Hi!$ ... PROMPT_COMMAND is regularly used to change the xterm window title. You may find this in /etc/bashrc : case $TERM in xterm*) if [ -...

The PHP function strval returns the string value of a variable. It does the same thing as casting a variable to string, or automatic conversion where string is expected. Conversion rules: Type String Value Boolean TRUE '1' Boolean FALSE '' (empty string) integer of float string representing the number Array The string 'Array' Object Result of __toString() if defined, error otherwise Resource 'Resource id #n' , where n is a number assigned to the resource. NULL '' (empty string) Example: <?php set_error_handler(function($errno, $errst... Results: bool(true) --------------------- strval: '1'...

The PHP function set_error_handle sets a user defined error handler function. The example below uses a global variable to alter the execution path after error occurs: <?php $continue = true; set_error_ha... Output: [Error Handler] errno: 2 errstr: Division by...

The PHP function is_callable verifies that a variable can be invoked as a function. Example: <?php define('F', 'f'); function... Output: var_dump: string(1) "f" is_callable: 1 Calla...

This is normally a syntax error just before some variable. Try some of these: Missing operator before a variable: <?php $a = 'ab'; echo('Missing conca... Missing semicolon at end of line: <?php echo('Missing semicolon at end of lin... Missing ( and ) in for loop: <?php foreach $a as $i { echo "$i\n"; ... Missing keyword before class variable: <?php class A { // should be var $a; ...

The log line was like this: 2011-01-19 15:16:34,842 INFO [STDOUT] (HDScanne... Note that INFO and timestamp were printed twice. Based on my configuration, I was expecting something like this: 2011-01-19 15:16:34,842 INFO [XmlWebApplicationC... i.e., the logger name should have been XmlWebApplicationContext , not STDOUT ! What was the problem? I found this error message in server.log : 2011-01-19 14:34:38,107 ERROR [STDERR] (main) lo... It turned out that org.apache.log4j.Appender was loaded by my web application class loader, whereas org.jboss.logging.appender.FileAppender was loaded by the JBoss bootstrap class loader. Removing the log4j jar from my web application archive fixed the problem (sine log4j is already available in JBoss). Why was the logger changed to STDOUT? JBoss detects that there's a problem with the log4j configuration and routes all...

This is the error: >>> import urllib2 >>> f = urllib2.urlopen('htt... Reason: SSL is not supported in Python installation. >>> import httplib >>> hasattr(httplib, 'HTTPS'... Solution: recompile Python with SSL on Steps: Download and install OpenSSL , if you don't have it already. Download Python source and rebuild Python (the usual steps of configure, make and make install). Python's configure script should be able to pick up your existing SSL libraries automatically and build a shared library _ssl.so. Some web sites suggest editing the file Modules/setup.dist , uncomment the lines starting with _ssl , and making changes to the SSL path. This would link the SSL library statically to Python. # Socket module helper for socket(2) #_socket s...