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Homebrew: List only installed top level formulas
... behaviour with regards to mysql on your system and why the output differs from my solution, but you can easily adapt leaves.rb to your liking.
– Adrian Frühwirth
Apr 2 '14 at 9:02
...
What is recursion and when should I use it?
...ily be replaced by more efficient iteration. After all, recursion suffers from function call overhead, which in the example above could be substantial compared to the operation inside the function itself.
So the whole reason to do recursion rather than iteration should be to take advantage of the ...
Django - what is the difference between render(), render_to_response() and direct_to_template()?
...will automatically use RequestContext that I will most definitely be using from now on.
2020 EDIT: It should be noted that render_to_response() was removed in Django 3.0
https://docs.djangoproject.com/en/1.8/topics/http/shortcuts/#render-to-response
render_to_response(template[, dictionary][, c...
Check if a class has a member function of a given signature
...ou may exploit SFINAE to detect function presence at compile-time. Example from my code (tests if class has member function size_t used_memory() const).
template<typename T>
struct HasUsedMemoryMethod
{
template<typename U, size_t (U::*)() const> struct SFINAE {};
template<ty...
Strtotime() doesn't work with dd/mm/YYYY format
...
You can parse dates from a custom format (as of PHP 5.3) with DateTime::createFromFormat
$timestamp = DateTime::createFromFormat('!d/m/Y', '23/05/2010')->getTimestamp();
(Aside: The ! is used to reset non-specified values to the Unix times...
Why is typeof null “object”?
...
From the MDN page about the behaviour of the typeof operator:
null
// This stands since the beginning of JavaScript
typeof null === 'object';
In the first implementation of JavaScript, JavaScript values were represented ...
Force overwrite of local file with what's in origin repo?
...
Full sync has few tasks:
reverting changes
removing new files
get latest from remote repository
git reset HEAD --hard
git clean -f
git pull origin master
Or else, what I prefer is that, I may create a new branch with the latest from the remote using:
git checkout origin/master -b <new branch...
How to close activity and go back to previous activity in android
...Y_REQUEST_CODE);
Inside your called activity you can then get the Intent from the onCreate() parameter or used
getIntent();
To set return a result to activity one then in activity two do
setResult(Activity.RESULT_OK, MyIntentToReturn);
If you have no intent to return then just say
setResult...
How to generate random SHA1 hash to use as ID in node.js?
...nter by 1 million, we get the probability of the length of number returned from Math.random.
len frequency(%)
------------------
13 0.0004
14 0.0066
15 0.0654
16 0.6768
17 6.6703
18 61.133 <- highest probability
19 28.089 <- second highest probability
20 ...
Swift Programming: getter/setter in stored property
..."var" keyword fool you! It does mean that there are two entries accessible from the private namespace, but that has no bearing on protected/public and keeps the value of foo valid at all times. This is essentially the "view" pattern. The problem you get with rewriting via didSet, in addition to it h...