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Relationship between hashCode and equals method in Java [duplicate]
... as key in HashMap (edited after comment from joachim-sauer), and you will start facing trouble. A contract is a guideline, not something forced upon you.
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Eclipse menus don't show up after upgrading to Ubuntu 13.10
...OXY=0 /your/path/to/eclipse/binary
Open eclipse, the eclipse's menu will start showing up.
(Works on On post Ubuntu version 12.04)
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Calculating moving average
...ctor of the same length with res = arr. Then there is a loop that iterates starting at n or, the 15th element, to the end of the array. that means the very first subset he takes the mean of is arr[1:15] which fills spot res[15]. Now, I prefer settingres = rep(NA, length(arr)) instead of res = arr so...
How to detect a textbox's content has changed
...
Start observing 'input' event instead of 'change'.
jQuery('#some_text_box').on('input', function() {
// do your stuff
});
...which is nice and clean, but may be extended further to:
jQuery('#some_text_box').on('input ...
form_for with nested resources
...e_id => 42, :comment => {...}
I learned this because my unit-tests started failing when I switched from this:
resources :comments
resources :articles do
resources :comments
end
to this:
resources :comments, :only => [:destroy, :show, :edit, :update]
resources :articles do
resource...
How can I add new array elements at the beginning of an array in Javascript?
...push
shift <- array -> pop
and chart:
add remove start end
push X X
pop X X
unshift X X
shift X X
Check out the MDN Array documentation. Virtually every language that has the ability to push...
Check if a Windows service exists and delete in PowerShell
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Starting in Windows PowerShell 3.0, the cmdlet Get-WmiObject has been superseded by Get-CimInstance. So nowadays you can do this: Stop-Service 'servicename'; Get-CimInstance -ClassName Win32_Service -Filter "Name='servicename...
Which terminal command to get just IP address and nothing else?
...urn just the IP address.
Or you could loop over possible interface names, starting with a suffix, i.e. en:
for NUMBER in $(seq 0 5); do
ip=`ipconfig getifaddr en$NUMBER`
if [ -n "$ip" ]; then
myip="$ip"
break
fi
done
echo $myip
Also, getting the IP address becomes no...
Open a new tab in gnome-terminal using command line [closed]
...otool key alt+t # my key map
xdotool sleep $DELAY # it may take a while to start new shell :(
xdotool type --delay 1 --clearmodifiers "$@"
xdotool key Return
wmctrl -i -a $WID # go to that window (WID is numeric)
# vim:ai
# EOF #
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What is the difference between the Facade and Adapter Pattern?
...ike someMethod(int year, int month) was delegated to someMethod(DateTime start, DateTime end) or lets say someMethod() delegated to someMethod(T param)
– Jaime Sangcap
Sep 8 '16 at 7:48
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