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What is the best way to do GUIs in Clojure?
...core))
(defn handler
[event]
(alert event
(str "<html>Hello from <b>Clojure</b>. Button "
(.getActionCommand event) " clicked.")))
(-> (frame :title "Hello Swing" :on-close :exit
:content (button :text "Click Me" :listen [:action handler]))
pack!
s...
How do you 'redo' changes after 'undo' with Emacs?
...the cursor is in the list,so we know where the undos are working backwards from
– barlop
Aug 21 '13 at 11:31
26
...
Distributed sequence number generation?
...nerate the unique IDs on the clients themselves, using an approach derived from how UUIDs and Snowflake's IDs are made. There are multiple options, but something along the lines of:
The most significant 40 or so bits: A timestamp; the generation time of the ID. (We're using the most significant bi...
Change key pair for ec2 instance
...buntu/.ssh/authorized_keys
Logout
Terminate micro instance
Detach volume A from it
Attach volume A back to the main instance as /dev/xvda
Start the main instance
Login as before, using your new .pem file
That's it.
share
...
When should I use Memcache instead of Memcached?
...d is an easy preventive system for stale data. Whenever you pull something from the cache, you can receive with it a cas token (a double number). You can than use that token to save your updated object. If no one else updated the value while your thread was running, the swap will succeed. Otherwise ...
Calling startActivity() from outside of an Activity context
...her
cache the Context object via constructor in your adapter, or
get it from your view.
Or as a last resort,
add - FLAG_ACTIVITY_NEW_TASK flag to your intent:
_
myIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
Edit - i would avoid setting flags as it will interfere with normal flow of ...
Angular HttpPromise: difference between `success`/`error` methods and `then`'s arguments
...e 2 is that .then() call returns a promise (resolved with a value returned from a callback) while .success() is more traditional way of registering callbacks and doesn't return a promise.
Promise-based callbacks (.then()) make it easy to chain promises (do a call, interpret results and then do anot...
Get JSON object from URL
... Sorry I forgot to mention that first how do I get this string from the url then access the json object?
– user2199343
Mar 25 '13 at 14:35
...
Random float number generation
...u'll need to employ a more advanced method.
This will generate a number from 0.0 to 1.0, inclusive.
float r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
This will generate a number from 0.0 to some arbitrary float, X:
float r2 = static_cast <float> (rand(...
Finding the mode of a list
...unter supplied in the collections package which has a mode-esque function
from collections import Counter
data = Counter(your_list_in_here)
data.most_common() # Returns all unique items and their counts
data.most_common(1) # Returns the highest occurring item
Note: Counter is new in python 2.7...