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Query to list all stored procedures
...m my understanding the "preferred" method is to use the information_schema tables:
select *
from information_schema.routines
where routine_type = 'PROCEDURE'
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Understanding “randomness”
...et after multiplying two random variables:
BarChart[BinCounts[Table[RandomReal[{0, 1}, 50000] *
RandomReal[{0, 1}, 50000], {50000}], 0.01]]
So, both are “random”, but their distribution is very different.
Another example
While 2 * Random() is un...
How to set the UITableView Section title programmatically (iPhone/iPad)?
I've created a UITableView in Interface Builder using storyboards . The UITableView is setup with static cells and a number of different sections.
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MVC 5 Seed Users and Roles
...AppAdmin");
}
}
I used package-manager "update-database". DB and all tables were created and seeded with data.
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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
... @blub: If you create a unique key on geb and topic it will work (ALTER TABLE table ADD UNIQUE geb_by_topic (geb, topic)).
– chaos
Aug 2 '09 at 13:43
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Are Stored Procedures more efficient, in general, than inline statements on modern RDBMS's? [duplica
...at is generated is sub-optimal.
For example, if you send SELECT *
FROM table WHERE id BETWEEN 1 AND
99999999, the DBMS may select a
full-table scan instead of an index
scan because you're grabbing every row
in the table (so sayeth the
statistics). If this is the cached
version, then ...
HTML5 LocalStorage: Checking if a key exists [duplicate]
...'s worth noting that the constraints FF (28.0) imposes on its localStorage table allows null values: CREATE TABLE webappsstore2 (scope TEXT, key TEXT, value TEXT, secure INTEGER, owner TEXT) while Chrome does not: CREATE TABLE ItemTable (key TEXT UNIQUE ON CONFLICT REPLACE, value BLOB NOT NULL ON CO...
MySQL: @variable vs. variable. What's the difference?
...t work because my_var is not a system variable, whereas we can do set@@big_tables=1, set@@session.big_tables=1, and set session big_tables=1 because big_tables is a system variable.
– Pacerier
May 24 '15 at 23:10
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Changing Font Size For UITableView Section Headers
...instruct me on the easiest way to change the font size for the text in a UITableView section header?
11 Answers
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Applying a function to every row of a table using dplyr?
...o create an appropriately vectorised function.
R provide pmax which is suitable here, however it also provides Vectorize as a wrapper for mapply to allow you to create a vectorised arbitrary version of an arbitrary function.
library(dplyr)
# use base R pmax (vectorized in C)
iris %>% mutate(max...