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What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
...he C++ standard mandates minimum ranges for each, and that long long is at least as wide as long.
The controlling parts of the standard (C++11, but this has been around for a long time) are, for one, 3.9.1 Fundamental types, section 2 (a later section gives similar rules for the unsigned integral t...
How can I generate a unique ID in Python? [duplicate]
...or. Statistically unique IDs typically are generated from random data; at least one class of UUIDs works that way.
– Glenn Maynard
Jul 31 '09 at 4:38
1
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How can I find the version of the Fedora I use?
...
You could try
lsb_release -a
which works on at least Debian and Ubuntu (and since it's LSB, it should surely be on most of the other mainstream distros at least). http://rpmfind.net/linux/RPM/sourceforge/l/ls/lsb/lsb_release-1.0-1.i386.html suggests it's been around quite...
Where can I find the IIS logs?
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Excellent! Now I've got logs, at least. Too bad they did not really give me the answers I was hoping for, but at least I learned something. Thanks again!
– Kjartan
Jun 21 '11 at 14:31
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How to use concerns in Rails 4
...f find_first_comment
comments.first(created_at DESC)
end
def self.least_commented
#return the article with least number of comments
end
end
Event Model
class Event < ActiveRecord::Base
has_many :comments, as: :commentable
def find_first_comment
comments.first(created_at...
Finding duplicate values in MySQL
...ly return true if the aforementioned second row exists (i. e. there are at least two rows with the same value of varchar_column) .
Having an index on varchar_column will, of course, speed up this query greatly.
share
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MySQL Select minimum/maximum among two (or more) given values
...
You can use LEAST and GREATEST function to achieve it.
SELECT
GREATEST(A.date0, B.date0) AS date0,
LEAST(A.date1, B.date1) AS date1
FROM A, B
WHERE B.x = A.x
Both are described here http://dev.mysql.com/doc/refman/5.0/en/compa...
Objective-C: difference between id and void *
...u can. Even NSObject * is better than id because the compiler can, at the least, provide better validation of method invocations against that reference.
The one common and valid use of void * is as an opaque data reference that is passed through some other API.
Consider the sortedArrayUsingFuncti...
How do SQL EXISTS statements work?
... exits, returning TRUE on the first match - because the supplier exists at least once in the ORDERS table. If you wanted to see the duplication of the SUPPLIER data because of having more than one child relationship in ORDERS, you'd have to use a JOIN. But most don't want that duplication, and run...
Detect 7 inch and 10 inch tablet programmatically
..., etc.).
Remember, these are some of the buckets:
xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp
320dp: a typical phone screen (240x320 ldpi, 320x480 mdpi, 480x800 hdpi, etc).
48...