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How to find out if you're using HTTPS without $_SERVER['HTTPS']
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I have just had an issue where I was running the server using Apache mod_ssl, yet a phpinfo() and a var_dump( $_SERVER ) showed that PHP still thinks I'm on port 80.
Here is my workaround for anyone with the same issue....
<VirtualHost *:443>
SetEnv HTTPS on
DocumentRoot /var/www/v...
Add st, nd, rd and th (ordinal) suffix to a number
... it down:
(n + 90) % 100: This expression takes the input integer − 10 mod 100, mapping 10 to 0, ... 99 to 89, 0 to 90, ..., 9 to 99. Now the integers ending in 11, 12, 13 are at the lower end (mapped to 1, 2, 3).
- 10: Now 10 is mapped to −10, 19 to −1, 99 to 79, 0 to 80, ... 9 to 89. The i...
Advantages of Binary Search Trees over Hash Tables
...unction outputs have to exist in the array. The hash values can simply be modded by the length of the array to allow a smaller array. Of course, the ultimate number of elements being added may not be known, so the hash table may still allocate more space than is necessary. Binary search trees can...
Case conventions on element names?
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To add to Metro Smurf's answer.
The National Information Exchange Model (NIEM: http://en.wikipedia.org/wiki/National_Information_Exchange_Model) says to use:
Upper CamelCase (PascalCase) for elements.
(lower) camelCase for attributes.
The NIEM makes for a good option when you're looking...
Do I need to convert .CER to .CRT for Apache SSL certificates? If so, how?
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According to documentation mod_ssl:
SSLCertificateFile:
Name: SSLCertificateFile
Description: Server PEM-encoded X.509 certificate file
Certificate file should be PEM-encoded X.509 Certificate file:
openssl x509 -inform DER -in certificate.c...
String formatting: % vs. .format vs. string literal
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Something that the modulo operator ( % ) can't do, afaik:
tu = (12,45,22222,103,6)
print '{0} {2} {1} {2} {3} {2} {4} {2}'.format(*tu)
result
12 22222 45 22222 103 22222 6 22222
Very useful.
Another point: format(), being a function, can...
What does “%” (percent) do in PowerShell?
... ForEach-Object
When used in the context of an equation, it's the modulus operator:
> 11 % 5
1
and as the modulus operator, % can also be used in an assignment operator (%=):
> $this = 11
> $this %= 5
> $this
1
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How big can a user agent string get?
... Apache limits the maximum field length to 8k (httpd.apache.org/docs/2.2/mod/core.html#limitrequestfieldsize).
– Gumbo
Mar 17 '09 at 17:11
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mongodb: insert if not exists
...ldn't $setOnInsert with the _id field - it would say something like "can't Mod the _id field". This was a bug, fixed in v2.5.4 or there abouts. If you see this message or issue, just get the latest version.
– Kieren Johnstone
May 17 '15 at 20:16
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Signed versus Unsigned Integers
... magnitude), but more common is two's complement. Both are in use in most modern microprocessors — floating point uses sign and magnitude, while integer arithmetic uses two's complement.
signed integers can hold both positive and negative numbers.
Yes
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