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What is the proper way to check if a string is empty in Perl?
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answered Jan 11 '10 at 23:20
Greg HewgillGreg Hewgill
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What is a unix command for deleting the first N characters of a line?
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answered Jun 9 '09 at 19:06
iammichaeliammichael
7,82733 gold badges2929 silver badges4141 bronze badges
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How to undo 'git reset'?
...nd want to undo it. My reflog looks like this:
$ git reflog
3f6db14 HEAD@{0}: HEAD~: updating HEAD
d27924e HEAD@{1}: checkout: moving from d27924e0fe16776f0d0f1ee2933a0334a4787b4c
[...]
The first line says that HEAD 0 positions ago (in other words, the current position) is 3f6db14; it was obtaine...
What is the status of JSR 305?
I have seen the question JSR305 vs. JSR308 (Java Type Anotations) - Which is going to be the standard? and I understand the difference between JSR 308 and JSR 305 .
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How do I pass parameters into a PHP script through a webpage?
...rg2
... and then accessing them in the script thusly:
<?php
// $argv[0] is '/path/to/wwwpublic/path/to/script.php'
$argument1 = $argv[1];
$argument2 = $argv[2];
?>
What you need to be doing when passing arguments through HTTP (accessing the script over the web) is using the query string a...
MySQL: What's the difference between float and double?
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106
They both represent floating point numbers. A FLOAT is for single-precision, while a DOUBLE is ...
Find commit by hash SHA in Git
...ind a commit in Git by a given hash, SHA. For example, if I have the "a2c25061" hash, and I need to get the author and the committer of this commit.
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Compare integer in bash, unary operator expected
... specifying a default value for $i if $i is blank, as follows:
if [ "${i:-0}" -ge 2 ] ; then ...
This will substitute the value 0 instead of $i is $i is undefined. I still maintain the quotes because, again, if $i is a bunch of blanks then it does not count as undefined, it will not be replaced ...
Django's SuspiciousOperation Invalid HTTP_HOST header
...re is discussion right now by the Django developers to change this from a 500 internal server error to a 400 response. See this ticket.
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Content Security Policy “data” not working for base64 Images in Chrome 28
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edited Dec 9 '16 at 10:25
Pang
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