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Replace words in a string - Ruby
...ging"
Regular expressions have word boundaries, such as \b which matches start or end of a word. Thus,
'mislocated cat, vindicating'.gsub(/\bcat\b/, 'dog')
=> "mislocated dog, vindicating"
In Ruby, unlike some other languages like Javascript, word boundaries are UTF-8-compatible, so you can ...
How can I use PowerShell with the Visual Studio Command Prompt?
...
The simplest option is to run the VS 2010 command prompt and then start PowerShell.exe. If you really want to do this from your "home" PowerShell prompt, the approach you show is the way to go. I use a script that Lee Holmes wrote a while back:
<#
.SYNOPSIS
Invokes the specified ba...
How to allow http content within an iframe on a https site
... IIS, Apache
Get valid SSL certificate to avoid security errors (free from startssl.com for example)
Write a wrapper, which will download insecure content (how to below)
From your site/app get https://yourproxy.com/?page=http://insecurepage.com
If you simply download remote site content via file_g...
Database sharding vs partitioning
...stagram solved their partitioning in the early days (see link below). They started out partitioned on very few servers, using Postgres to divide the data from the get-go. I believe it was several thousand logical shards on those few physical shards. Read their awesome writeup from 2012 here: Instagr...
How to split a long regular expression into multiple lines in JavaScript?
...n:
regex`^\s*
(
//closing the object
(\})|
//starting from open or comma you can...
(?:[,{]\s*)(?:
//have a rest operator
(\.\.\.)
|
//have a property key
(
//a non-negative integer
...
Get file size, image width and height before upload
...
So I started experimenting with the different things that FileReader API had to offer and could create an IMG tag with a DATA URL.
Drawback: It doesn't work on mobile phones, but it works fine on Google Chrome.
$('input').ch...
Programmatically creating Markdown tables in R with KnitR
I am just starting to learn about KnitR and the use of Markdown in generating R documents and reports. This looks to be perfect for a lot of the day to day reporting that I have to do with my job. However, one thing that I'm not seeing is an easy way to print data frames and tables using Markdown fo...
Microsoft Excel mangles Diacritics in .csv files?
...her encoding such as Windows-1252 and display the characters  at the start of the file.
There is a known bug where Excel, upon opening UTF8 CSV files via file association, assumes that they are in a single-byte encoding, disregarding the presence of the UTF8 BOM. This can not be fixed by any ...
How to get the top 10 values in postgresql?
...erformance is important (when is it not ;-) look for an index on score.
Starting with version 8.4, you can also use the standard (SQL:2008) fetch first
select *
from scores
order by score desc
fetch first 10 rows only
As @Raphvanns pointed out, this will give you the first 10 rows literally....
RSpec: how to test if a method was called?
... do with spy:
Message expectations put an example's expectation at the start, before you've invoked the
code-under-test. Many developers prefer using an arrange-act-assert (or given-when-then)
pattern for structuring tests. Spies are an alternate type of test double that support this
patte...