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How to redirect to a 404 in Rails?
...tionality built in already. If you want to show a 404 page, create a render_404 method (or not_found as I called it) in ApplicationController like this:
def not_found
raise ActionController::RoutingError.new('Not Found')
end
Rails also handles AbstractController::ActionNotFound, and ActiveReco...
How to change the session timeout in PHP?
...u are using PHP's default session handling with cookies, setting session.gc_maxlifetime along with session_set_cookie_params should work for you like this:
// server should keep session data for AT LEAST 1 hour
ini_set('session.gc_maxlifetime', 3600);
// each client should remember their session id...
How to print the contents of RDD?
....
// For implicit conversion from RDD to DataFrame
import spark.implicits._
fruits = sc.parallelize([("apple", 1), ("banana", 2), ("orange", 17)])
// convert to DF then show it
fruits.toDF().show()
This will show the top 20 lines of your data, so the size of your data should not be an issue.
+...
Does IMDB provide an API? [closed]
...ail, IMDb uses the following: if (ua.i) { c.img = { src: ua.i[0].replace("._V1_.jpg", "._V1._SX40_CR0,0,40,54_.jpg"), width: 40, height: 54 } }.
– Timo Tijhof
Sep 29 '12 at 0:01
...
Print string to text file
...
text_file = open("Output.txt", "w")
text_file.write("Purchase Amount: %s" % TotalAmount)
text_file.close()
If you use a context manager, the file is closed automatically for you
with open("Output.txt", "w") as text_file:
t...
Python's many ways of string formatting — are the older ones (going to be) deprecated?
...0}".format(world, greeting='Hello')
and is extensible through the object.__format__() hook used to handle formatting of individual values.
Note that the old system had % and the Template class, where the latter allows you to create subclasses that add or alter its behaviour. The new-style system ...
Iterate keys in a C++ map
...te on the keys instead of the pairs), then take a look at Boost's transform_iterator.
[Tip: when looking at Boost documentation for a new class, read the "examples" at the end first. You then have a sporting chance of figuring out what on earth the rest of it is talking about :-)]
...
Equivalent C++ to Python generator pattern
...:
// (implicit aliases)
public std::iterator<
std::input_iterator_tag,
std::pair<unsigned, unsigned>
>
{
// C++03
typedef void (PairSequence::*BoolLike)();
void non_comparable();
public:
// C++11 (explicit aliases)
using iterator_category = std::inpu...
iOS start Background Thread
...ou'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self getResultSetFromDB:docids];
});
GCD is a newer technology, and is more efficient in terms of memory overhead and lines of code.
Updated w...
What is the difference between partitioning and bucketing a table in Hive ?
...example, suppose a table using date as the top-level partition and employee_id as the second-level partition leads to too many small partitions. Instead, if we bucket the employee table and use employee_id as the bucketing column, the value of this column will be hashed by a user-defined number into...