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Using openssl to get the certificate from a server
...utput and also supports SNI, which is important if you are working with an HTTP server is:
openssl s_client -servername example.com -connect example.com:443 \
</dev/null 2>/dev/null | openssl x509 -text
The -servername option is to enable SNI support and the openssl x509 -text prints th...
Set margin size when converting from Markdown to PDF with pandoc
...file). However, the PDF that is produced have massive margins (like this http://johnmacfarlane.net/pandoc/demo/example13.pdf ). How can I get pandoc to produce something with smaller margins? I have looked through the pandoc user guide, but haven't found anything useful.
...
What are commit-ish and tree-ish in Git?
...adjective in order to indicate "having qualities like" or "slightly" - see http://chambers.co.uk/search/?query=ish&title=21st
Hence "tree-ish" - like a "tree" .... "commit-ish" - like a "commit"
eg "Mars appears like a reddish star" ("d" is doubled !); "the food on the plate was not hot, but w...
How to print number with commas as thousands separators?
... For Python ≥3.6
Locale aware
import locale
locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8'
'{:n}'.format(value) # For Python ≥2.7
f'{value:n}' # For Python ≥3.6
Reference
Per Format Specification Mini-Language,
The ',' option signals the use...
How can one print a size_t variable portably using the printf family?
I have a variable of type size_t , and I want to print it using printf() . What format specifier do I use to print it portably?
...
Is it unnecessary to put super() in constructor?
...matically calls it for you. If it has arguments you'll get an error.
src: http://java.sun.com/docs/books/tutorial/java/IandI/super.html
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How to remove .htaccess password protection from a subdirectory
...om all
You can restrict to your IP only with :
Allow from x.x.x.x
See : http://httpd.apache.org/docs/current/mod/mod_access_compat.html
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How can I prevent the backspace key from navigating back?
...f it is. In other words:
function confirmBackspaceNavigations () {
// http://stackoverflow.com/a/22949859/2407309
var backspaceIsPressed = false
$(document).keydown(function(event){
if (event.which == 8) {
backspaceIsPressed = true
}
})
$(document).ke...
java.lang.OutOfMemoryError: Java heap space
...
You may want to look at this site to learn more about memory in the JVM:
http://developer.streamezzo.com/content/learn/articles/optimization-heap-memory-usage
I have found it useful to use visualgc to watch how the different parts of the memory model is filling up, to determine what to change.
I...
Canary release strategy vs. Blue/Green
...
I have written a detailed essay on this topic here: http://blog.itaysk.com/2017/11/20/deployment-strategies-defined
In my opinion, the difference is whether or not the new 'green' version is exposed to real users. If it is, then I'd call it Canary. A common way to implement C...