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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
...
Designing function f(f(n)) == -n
...move the integer that doesn't have a positive counterpart, we still have 2(mod4) numbers.
If we remove the 2 maximal numbers left (by abs value), we can get the function:
int sign(int n)
{
if(n>0)
return 1;
else
return -1;
}
int f(int n)
{
if(n==0) return 0;
sw...
How to send a command to all panes in tmux?
...ession, replace -a with -s (It's all in the tmux man page).
I haven't the mod points to comment directly on each of the above answers, so here's why they weren't working for me:
The problem that I had with @shailesh-garg 's answer was that the sync affected only commands issued within the panes, n...
What are the Ruby File.open modes and options?
Ruby's File.open takes modes and options as arguments. Where do I find a complete list of modes and options?
2 Answers
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