======Arrays======

=====Create an array=====

<code>
% local -a buffer
% buffer=(a b c)
</code>

=====Create an array with each words of a string=====

<code>
% string="Welcome to the real world, Neo"
% buffer=(${=string})
</code>

=====Create an array of lines from a file=====
<code>
% buffer=("${(f)$(< /etc/hosts)}")
% echo $buffer[1]
127.0.0.1       eva-O1.linagora.com     eva-01
</code>

=====Find element position in array=====
<code>
arr=(a b cv de)
echo ${(k)arr[(r)a]}   #this will print "1"
echo ${(k)arr[(r)imnothere]} #this will print 5, that is n+1.
echo ${arr[(r)imnothere]} #this will print nothing. that is, you can do if [[ -n to check if an element belongs to an array
</code>

==== Associative variant ====
If you are using associative arrays, <code>echo ${arr[(r)imnothere]}</code> is not fine, because you could have a key whose value is in fact an empty string. Luckily, 
<code>
echo ${(k)arr[(r)imnothere]}
</code>
WILL return an empty string, so the change is easy