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Having a UITextField in a UITableViewCell
...o, I'm still unable to have a fully working UITextField in some of my UITableViewCells , just like in this example:
12 ...
Which rows are returned when using LIMIT with OFFSET in MySQL?
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OFFSET is nothing but a keyword to indicate starting cursor in table
SELECT column FROM table LIMIT 18 OFFSET 8 -- fetch 18 records, begin with record 9 (OFFSET 8)
you would get the same result form
SELECT column FROM table LIMIT 8, 18
visual representation (R is one record in the ...
How to select rows from a DataFrame based on column values?
... links could be very useful to many of you: pandas.pydata.org/pandas-docs/stable/indexing.html gregreda.com/2013/10/26/working-with-pandas-dataframes
– tremendows
May 27 '14 at 7:32
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Best way to store password in database [closed]
...gets a hold of your database, they can still use what are known as rainbow tables to be able to "decrypt" the password (at least those that show up in the rainbow table). To get around this, developers add a salt to passwords which, when properly done, makes rainbow attacks simply infeasible to do. ...
Add a reference column migration in Rails 4
A user has many uploads. I want to add a column to the uploads table that references the user . What should the migration look like?
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Transpose a data frame
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You can use the transpose function from the data.table library. Simple and fast solution that keeps numeric values as numeric.
library(data.table)
# get data
data("mtcars")
# transpose
t_mtcars <- transpose(mtcars)
# get row and colnames in order
colnames(t_mtc...
Secure hash and salt for PHP passwords
... etc, can actually reduce entropy by making the password scheme more predictable. I do agree. Randomess, as truly random as possible, is always the safest but least memorable solution.
So far as I've been able to tell, making the world's best password is a Catch-22. Either its not memorable, too pr...
SQLite - UPSERT *not* INSERT or REPLACE
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Assuming three columns in the table: ID, NAME, ROLE
BAD: This will insert or replace all columns with new values for ID=1:
INSERT OR REPLACE INTO Employee (id, name, role)
VALUES (1, 'John Foo', 'CEO');
BAD: This will insert or replace 2 of the...
MySQL combine two columns into one column
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Try this, it works for me
select (column1 || ' '|| column2) from table;
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Is there type Long in SQLite?
I want to create a table with the column type Long instead of Integer . Is it possible?
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