perl eval return

Perl, as a scripting language, can generate and execute code in real time. This feature can defer the compilation of code to the runtime, so it is called "Dynamic Code". In addition, Perl also provides exception handling mechanisms like Java and C +

Die Function 18.4 handle errors In many cases, system calls may fail. For example, you can try to open a non-existing file, delete a directory that still contains the file, or Try to read files without read permission. In the previous example, we

Enable Perl before compiling Vim; Use the Perl interface ** Perl-using **: Perl **: Pe *: PE [RL]{cmd}Run the Perl Command{cmd}. The current package is "Main ". : PE [RL] {endpattern}{script}{endpattern}Execute the Perl

$ Total = 0;$ COUNT = 0;Eval {$ average = $ total/$ count; print "xxx/N ";};If ($ @){Print "wrong/N ";}Else{Print "right/N ";} The semicolon at the end of the eval block is required, because Eval is actually a function, unlike the if or while

How to Use eclipse to debug a Perl application before 11:30:36 This tutorial will introduce the debugging functions provided by the eclipse epic plug-in. This plug-in provides a rich debugging environment that can be used in the epic Perl

Perl + fastcgi + nginx Build Nginx + fastcgi is the most popular environment in PHP, then Perl will also have fastcgi it, of course, Today to build the next Nginx Perl fastcgi. Performance is no less than PHP, but now the popularity of Web programs

Program scripts in the process of running, always encounter such a problem, we will anticipate some problems and prepare them for processing code, and some unpredictable. The good program should be able to deal with as many of the possible anomalies

transferred from: http://perl.apache.org/docs/general/perl_reference/perl_reference.html Use (), require (), do (),%inc and @INC explained The @INC array @INC is a special Perl variable which is the equivalent of the shell ' s PATH variable.

From: http://perl.apache.org/docs/general/perl_reference/perl_reference.html Use (), require (), Do (), % INC and @ INC explained   The @ INC Array @ INCIs a special Perl variable which is the equivalent of the shell'sPathVariable.

This is notes from reading the "Object Oriented Perl programming ". Elements of the @ _ array are special in that they are not copies of the actual arguments of the function call. rather they are aliases for those arguments. that means that if