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Determining complexity for recursive functions (Big O notation)
...ant.
5.
T(n) = n / 2 + T(n - 5)
where n is some constant
Rewrite n = 5q + r where q and r are integer and r = 0, 1, 2, 3, 4
T(5q + r) = (5q + r) / 2 + T(5 * (q - 1) + r)
We have q = (n - r) / 5, and since r < 5, we can consider it a constant, so q = O(n)
By induction:
T(n) = T(5q + r)
...
AngularJS - wait for multiple resource queries to complete
...
You'll want to use promises and $q.all().
Basically, you can use it to wrap all of your $resource or $http calls because they return promises.
function doQuery(type) {
var d = $q.defer();
var result = Account.query({ type: type }, function() {
...
Difference between Django's annotate and aggregate methods?
...rage_price': 34.35}
Returns a dictionary containing the average price of all books in the queryset.
Annotation
>>> q = Book.objects.annotate(num_authors=Count('authors'))
>>> q[0].num_authors
2
>>> q[1].num_authors
1
q is the queryset of books, but each book has been...
“You have mail” message in terminal, os X [closed]
...
and then type "d *" to erase all messages
– Ricardo Martins
Mar 20 '17 at 12:23
9
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How to get first N elements of a list in C#?
...many C# versions later. For the specific case where you have a list. Especially if you are skipping many items. E.g. you have a list of one million items, and you want a slice of 5 of them, far into the list. GetRange knows exactly where to go to grab them. I don't know whether Skip + Take is as sma...
How to trim leading and trailing white spaces of a string?
...trings"
)
func main() {
s := "\t Hello, World\n "
fmt.Printf("%d %q\n", len(s), s)
t := strings.TrimSpace(s)
fmt.Printf("%d %q\n", len(t), t)
}
Output:
16 "\t Hello, World\n "
12 "Hello, World"
share
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AngularJS- Login and Authentication in each route and controller
...e run method you watch when the route changes and you check if the user is allowed to access the requested page, in your main controller you watch if the state of the user change.
app.run(['$rootScope', '$location', 'Auth', function ($rootScope, $location, Auth) {
$rootScope.$on('$routeChangeSt...
Is either GET or POST more secure than the other?
...e would be to pass it using Secure HTTP.
GET or query string posts are really good for information required for either bookmarking a particular item, or for assisting in search engine optimization and indexing items.
POST is good for standard forms used to submit one time data. I wouldn't use G...
Default filter in Django admin
How can I change the default filter choice from 'ALL'? I have a field named as status which has three values: activate , pending and rejected . When I use list_filter in Django admin, the filter is by default set to 'All' but I want to set it to pending by default.
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Run a PostgreSQL .sql file using command line arguments
...n use the following by navigating to the bin folder of your PostgreSQL install:
12 Answers
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