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Difference between \n and \r?
...ystems, \n is the code for end-of-line, \r means nothing special
as a consequence, in C and most languages that somehow copy it (even remotely), \n is the standard escape sequence for end of line (translated to/from OS-specific sequences as needed)
in old Mac systems (pre-OS X), \r was the code for ...
What's the difference between equal?, eql?, ===, and ==?
... are MD5, SHA-1, and CRC. They are used in encryption algorithms, database indexing, file integrity checking, etc. Some programming languages, such as Ruby, provide a collection type called hash table. Hash tables are dictionary-like collections which store data in pairs, consisting of unique keys a...
What is the difference between window, screen, and document in Javascript?
...at about the document object then? The document object is your html, aspx, php, or other document that will be loaded into the browser. The document actually gets loaded inside the window object and has properties available to it like title, URL, cookie, etc. What does this really mean? That means i...
Real escape string and PDO [duplicate]
...escape_string() with the PDO::quote() method.
Here is an excerpt from the PHP website:
<?php
$conn = new PDO('sqlite:/home/lynn/music.sql3');
/* Simple string */
$string = 'Nice';
print "Unquoted string: $string\n";
print "Quoted string: " . $conn->quote($string) . "\n";...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
...gust 2012, so if you are from the future you should do your homework.
Prerequisites
Assumes you are using CentOS:
Remove current instance of NGINX (suggest using dev server for this)
If possible, save your old NGINX config files so you can re-use them (that includes your init.d/nginx script)
yum in...
How do I navigate in the results of Diff
... : return
Next page : space bar
Previous page : w
Quit viewing the diff : q
Help : h
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How to break out of multiple loops?
...ops, what do I do' refactoring may not make sense.
– quick_dry
Oct 10 '08 at 1:11
using an exception may be easier whe...
Combine two columns of text in pandas dataframe
...taframe in Python using pandas. Two of these columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
...
What is base 64 encoding used for?
...
In a langange like php, were will binary data come from. We almost always work with string data which is text.
– Cholthi Paul Ttiopic
Sep 5 '16 at 14:02
...
What is the email subject length limit?
... "folding".
subject is defined as "unstructured" in RFC 5322
here's some quotes ([...] indicate stuff i omitted)
3.6.5. Informational Fields
The informational fields are all optional. The "Subject:" and
"Comments:" fields are unstructured fields as defined in section
2.2.1, [...]
2.2.1. ...