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Test if string is a number in Ruby on Rails
...il 1154461.1 (±5.5%) i/s - 5788976 in 5.035311s
require 'benchmark/ips'
int = '220000'
bad_int = '22.to.2'
Benchmark.ips do |x|
x.report('cast') do
Integer(int) rescue false
end
x.report('cast fail') do
Integer(bad_int) rescue false
end
x.report('to_s') do
int.to_i....
Django's SuspiciousOperation Invalid HTTP_HOST header
... a more likely explanation is web crawlers (robots) simply crawling public IP addresses on port 80 - in which case you would want to allow them.
– markmnl
May 16 '14 at 4:12
16
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write a shell script to ssh to a remote machine and execute commands
...
There are multiple remote linux machines, and I need to write a shell script which will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?
You can do this with ...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
...keRequired code pattern are very helpful.
– Erik Philips
Jan 9 '13 at 1:12
...
Connect Java to a MySQL database
... default 3306.
Download the JDBC driver and put in classpath, extract the ZIP file and put the containing JAR file in the classpath. The vendor-specific JDBC driver is a concrete implementation of the JDBC API (tutorial here).
If you're using an IDE like Eclipse or Netbeans, then you can add it to...
What's the difference between ASCII and Unicode?
...quence, they didn't need to support accents or other
marks such as á, ü, ç, ñ, etc. (aka diacritics).
ASCII Extended
Some clever people started using the 8th bit (the bit used for parity) to encode more characters to support their language (to support "é", in French, for example). Just using o...
How to configure socket connect timeout
When the Client tries to connect to a disconnected IP address, there is a long timeout over 15 seconds... How can we reduce this timeout? What is the method to configure it?
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Does have to be in the of an HTML document?
...
The linked article has vanished into the link rot æther, so here's the latest available archived version: web.archive.org/web/20150525042412/http://bluerobot.com/web/css/…
– Zachary Murray
Jan 26 '16 at 22:02
...
How to get execution time in rails console?
...be better to add another answer or comment with reference to the benchmark-ips gem? You've done quite a big edit to the answer there which changes it significantly and rather reduces the appropriateness of the votes on it already.
– Shadwell
Jan 2 '17 at 13:01
...
YYYY-MM-DD format date in shell script
... a more compact notation for the accepted answer.
– Håvard Geithus
Nov 16 '15 at 20:42
...