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How to read data when some numbers contain commas as thousand separator?
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You can have read.table or read.csv do this conversion for you semi-automatically. First create a new class definition, then create a conversion function and set it as an "as" method using the setAs function like so:
setClass("num.with.commas...
Reset/remove CSS styles for element only
...: '\201C' '\201D' '\2018' '\2019';
right : auto;
tab-size : 8;
table-layout : auto;
text-align : inherit;
text-align-last : auto;
text-decoration : none;
text-decoration-color : inherit;
text-decoration-line : none;
text-decoration-style : solid;
text-indent :...
What is NoSQL, how does it work, and what benefits does it provide? [closed]
...past few years, people started to question this dogma. People wondered if tables with rows and columns are really the only way to represent data. People started thinking and coding, and came up with many new concepts how data could be organized. And they started to create new database systems desig...
How to create a SQL Server function to “join” multiple rows from a subquery into a single delimited
To illustrate, assume that I have two tables as follows:
13 Answers
13
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What is the difference between an interface and abstract class?
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Last comparison is confusing as per table! Methods in interface can't be static but variables are static final Implemented methods in abstract class can be static
– realPK
Mar 9 '14 at 4:29
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How to remove empty cells in UITableView? [duplicate]
i am trying to display a simple UITableView with some data. I wish to set the static height of the UITableView so that it doesn't displays empty cells at the end of the table. how do I do that?
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How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
...ting to object
Converting to resource
Converting to NULL
Type comparison table
As reference and example you can see the comparison table in the manual:
Loose comparisons with ==
┌─────────┬───────┬───────┬───────┬───...
How do you version your database schema? [closed]
... sure that schema changes are always additive. So I don't drop columns and tables, because that would zap the data and cannot be rolled back later. This way the code that uses the database can be rolled back without losing data or functionality.
I have a migration script that contains statements th...
Generating random strings with T-SQL
...tes a random seed it associates with the test run (saves it in the results table), then passed along the seed, similar to this:
declare @seed int;
declare @string varchar(256);
select @seed = 1234; -- saved start seed
exec usp_generateIdentifier
@seed = @seed output
, @string = @string o...
Adding placeholder text to textbox
...ered text. Seems like that would work better.
– DROP TABLE users
Dec 20 '13 at 22:49
6
This will ...