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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
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answered Sep 10 '12 at 17:20
DSMDSM
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TFS: How can you Undo Checkout of Unmodified files in a batch file
...ajority of these files are not modified, but the generator does not know this ahead of time.
10 Answers
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Any way to select without causing locking in MySQL?
...lowing:
SELECT * FROM TABLE_NAME WITH (nolock)
and the MYSQL equivalent is
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED ;
SELECT * FROM TABLE_NAME ;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ ;
EDIT
Michael Mior suggested the following (from the comments)
SET TRANSAC...
How to find if an array contains a specific string in JavaScript/jQuery? [duplicate]
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You really don't need jQuery for this.
var myarr = ["I", "like", "turtles"];
var arraycontainsturtles = (myarr.indexOf("turtles") > -1);
Hint: indexOf returns a number, representing the position where the specified searchvalue occurs for the first tim...
PHP Replace last occurrence of a String in a String?
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You can use this function:
function str_lreplace($search, $replace, $subject)
{
$pos = strrpos($subject, $search);
if($pos !== false)
{
$subject = substr_replace($subject, $replace, $pos, strlen($search));
}
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New line in JavaScript alert box
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edited Jun 12 '15 at 21:23
Madness
2,52233 gold ba...
What is the right way to override a setter method in Ruby on Rails?
I am using Ruby on Rails 3.2.2 and I would like to know if the following is a "proper"/"correct"/"sure" way to override a setter method for a my class attribute.
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Convert hex string to int in Python
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Without the 0x prefix, you need to specify the base explicitly, otherwise there's no way to tell:
x = int("deadbeef", 16)
With the 0x prefix, Python can distinguish hex and decimal automatically.
>>> print int("0xdeadbeef", 0)
3735928559
>>> print int("10", 0)
10
(You mu...
How to get HTTP response code for a URL in Java?
...GET");
connection.connect();
int code = connection.getResponseCode();
This is by no means a robust example; you'll need to handle IOExceptions and whatnot. But it should get you started.
If you need something with more capability, check out HttpClient.
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Run a PostgreSQL .sql file using command line arguments
...database in order to add them to a table. The files are that large that it is impossible to open them and copy the INSERT statements into an editor window and run them there. I found on the Internet that you can use the following by navigating to the bin folder of your PostgreSQL install:
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