Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Faster string length testing in PHP
Answer:
If you want to ensure a string variable has a particular length, you might use strlen
if ( strlen($str) > 10 ) {
// ...
}
A faster approach is to use isset
if ( isset($str[10]) ) {
// ...
}
eq vs == in Perl
Answer:
1. eq
It perform string comparison.
my $foo = "123";
my $bar = "123";
print $foo eq $bar; # output "1"
2. ==
It perform numeric comparison, string is first converted to numeric value before compare.
my $foo = "foo";
my $bar = "bar";
print $foo == $bar; # output "1", since 0 = 0 as strings are converted to 0 in both variables
Quick and easy SMTP server with Python
Answer:
You can start a Python SMTP server, with only a single command, without installing any additional software in modern Linux.
E.g.
sudo python -m smtpd -n -c DebuggingServer localhost:25
Define a constant in PHP
Answer:
To define a constant in PHP, you can use define()
define ("PI", 3.1415);
echo PI;
Convert string to integer in Python
Answer:
You can use the built-in int() type constructor, e.g.
int('123') == 123
