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What is the most efficient way of finding all the factors of a number in Python?
...s will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So if the two factors are the same, they're both the square root. If you make one factor bigger, you have to make the other factor smaller. This means that one of the two will ...
How to create a table from select query result in SQL Server 2008 [duplicate]
...a new table, but instead appends the data into an existing table, e.g. dev.mysql.com/doc/refman/8.0/en/….
– flow2k
May 19 at 8:07
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A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
... NSURL *certificateURL = [[NSBundle mainBundle] URLForResource:@"AppleIncRootCertificate" withExtension:@"cer"];
NSData *certificateData = [NSData dataWithContentsOfURL:certificateURL];
if ([self verifyPKCS7:p7 withCertificateData:certificateData])
{
struct pkcs7_st *contents =...
ImportError: No module named pip
...mpted to install the nova client.
spencers-macbook-pro:python-novaclient root# python setup.py install
running install
/usr/bin/python: No module named pip
error: /usr/bin/python -m pip.__init__ install 'pbr>=0.5.21,<1.0' 'iso8601>=0.1.4' 'PrettyTable>=0.6,<0.8' 'requests>...
Difference between string and text in rails?
...l is converted into its respective column type in query language.
with MySQL :string is mapped to VARCHAR(255)
- http://guides.rubyonrails.org/migrations.html
:string | VARCHAR | :limit => 1 to 255 (default = 255)
:text | TINYTEXT, TEXT, MEDIUMTEXT, or...
How to implement the activity stream in a social network
...s to browse far back in time (if you even offer this)
I use a plain old MySQL table for dealing with about 15 million activities.
It looks something like this:
id
user_id (int)
activity_type (tinyint)
source_id (int)
parent_id (int)
parent_type (tinyint)
time ...
What is the use of the square brackets [] in sql statements?
...y brackets if you want to use them as column / table / sp / etc. names. In MySQL angled single quotes ```` would be the equivalent of this.
– Baz Guvenkaya
Feb 9 '17 at 5:03
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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
...ith Rails and everything to do with whatever database you're using.
Using MySQL as an example (if for no other reason because it's most popular), you have DATE, DATETIME, TIME and TIMESTAMP column data types; just as you have CHAR, VARCHAR, FLOAT and INTEGER.
So, you ask, what's the difference? We...
How to exit in Node.js
... encounter, including Unix shells like Bash, the shells for databases like MySQL and PostgreSQL, and the REPLs for programming languages like Python, PHP, and Ruby. It is the only method of exiting shells I ever use.
– Mark Amery
May 23 '15 at 22:52
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How can I get the current network interface throughput statistics on Linux/UNIX? [closed]
...
This assumes root access is available
– Lionel
Nov 7 '11 at 4:18
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