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Is there a JSON equivalent of XQuery/XPath?
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How solid is this? And I can't find a Java or C# version which is a deal killer for us.
– David Thielen
Jun 12 '12 at 18:08
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What is an example of the simplest possible Socket.io example?
...ket.IO getting started page. The API has been quite simplified since I provided this answer. That being said, here is the original answer updated small-small for the newer API.
Just because I feel nice today:
index.html
<!doctype html>
<html>
<head>
<script src='/...
Open-sided Android stroke?
Is it possible to create an Android shape object with stroke on only certain sides?
8 Answers
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jQuery validate: How to add a rule for regular expression validation?
I am using the jQuery validation plugin . Great stuff! I want to migrate my existing ASP.NET solution to use jQuery instead of the ASP.NET validators. I am missing a replacement for the regular expression validator. I want to be able to do something like this:
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Best practices for in-app database migration for Sqlite
...database version, I use the built in user-version variable that sqlite provides (sqlite does nothing with this variable, you are free to use it however you please). It starts at 0, and you can get/set this variable with the following sqlite statements:
> PRAGMA user_version;
> PRAGMA user_...
How can I position my div at the bottom of its container?
...ive;
}
#copyright {
position: absolute;
bottom: 0;
}
<div id="container">
<!-- Other elements here -->
<div id="copyright">
Copyright Foo web designs
</div>
</div>
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Adding an identity to an existing column
I need to change the primary key of a table to an identity column, and there's already a number of rows in table.
19 Answe...
405 method not allowed Web API
...ng 405 method not allowed web api) , and finally I added [Route("api/scan/{id}")] to my controller and was work fine.
hope this post help some one.
// DELETE api/Scan/5
[Route("api/scan/{id}")]
[ResponseType(typeof(Scan))]
public IHttpActionResult DeleteScan(int id)
{
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CHECK constraint in MySQL is not working
... answered Jan 22 '10 at 7:11
David KerinsDavid Kerins
1,41911 gold badge88 silver badges33 bronze badges
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Numbering rows within groups in a data frame
...l, df$cat, FUN = seq_along)
or:
library(plyr)
ddply(df, .(cat), mutate, id = seq_along(val))
or:
library(dplyr)
df %>% group_by(cat) %>% mutate(id = row_number())
or (the most memory efficient, as it assigns by reference within DT):
library(data.table)
DT <- data.table(df)
DT[, id...