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Capturing Groups From a Grep RegEx
..."*.jpg"
regex="[0-9]+_([a-z]+)_[0-9a-z]*"
for f in $files # unquoted in order to allow the glob to expand
do
if [[ $f =~ $regex ]]
then
name="${BASH_REMATCH[1]}"
echo "${name}.jpg" # concatenate strings
name="${name}.jpg" # same thing stored in a variable
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How to use SQL Order By statement to sort results case insensitive?
I have a SQLite database that I am trying to sort by Alphabetical order. The problem is, SQLite doesn't seem to consider A=a during sorting, thus I get results like this:
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How to set environment variable for everyone under my linux system?
...it
looks for ~/.bash_profile,
~/.bash_login, and ~/.profile, in that
order, and reads and executes commands
from the first one that exists and is
readable. The --noprofile option may
be used when the shell is started to
inhibit this behavior.
...
When an
interactive shell that is...
What is the difference between compare() and compareTo()?
...re less than, equal, or greater than.
If your class objects have a natural order, implement the Comparable<T> interface and define this method. All Java classes that have a natural ordering implement Comparable<T> - Example: String, wrapper classes, BigInteger
compare(a, b):
Comparator i...
How to change the port of Tomcat from 8080 to 80?
...lt/tomcat7, uncomment the #AUTHBIND=no line and set its value to 'yes', in order to let the server bind on a privileged port.
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Physical vs. logical / soft delete of database record?
...he isDeleted column, I suggest the usage of two different tables: one with orders and another with deleted orders. In that case, you will have to maintain both the table, but in reality, it is very easy to maintain. When you write UPDATE statement to the isDeleted column, write INSERT INTO another t...
How to order events bound with jQuery
...eralize this kind of process, but in my case I was only concerned with the order of first event listener in the chain.
If it's of any use, here is my jQuery plugin that binds an event listener that is always triggered before any others:
** UPDATED inline with jQuery changes (thanks Toskan) **
(f...
Focus Next Element In Tab Index
...
Note that using flexbox the order of the elements are different in the DOM than visually in the browser. Just picking the next tabbable element does not work when you change the order of elements using flexbox.
– Haneev
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What is the use of static constructors?
...useful when you have static fields that rely upon each other such that the order of initialization is important. If you run your code through a formatter/beautifier that changes the order of the fields then you may find yourself with null values where you didn't expect them.
Example: Suppose we ha...
Oracle “Partition By” Keyword
... operation_date,
row_number() count(*) over (partition by client_id order by client_id ) as operationctrbyclient
from client_operations e
order by e.client_id;
this query will return the number of operations done by the client_id
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