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Rails: What's a good way to validate links (URLs)?
...lidURIError
false
end
Of course, there are tons of improvements you can apply to this method, including checking for a path or a scheme.
Last but not least, you can also package this code into a validator:
class HttpUrlValidator < ActiveModel::EachValidator
def self.compliant?(value)
ur...
What is the difference between libsqlite3.dylib and libsqlite3.0.dylib?
I'm getting started with SQLite databases in an app I'm working on. I've not run into issues yet but one of the early steps from this tutorial is linking the SQLite3 framework. The tutorial calls for libsqlite3.0.dylib but I noticed another one libsqlite3.dylib. Is the latter just a symlink to ...
How to use a keypress event in AngularJS?
...
You need to add a directive, like this:
Javascript:
app.directive('myEnter', function () {
return function (scope, element, attrs) {
element.bind("keydown keypress", function (event) {
if(event.which === 13) {
scope.$apply(function (){
...
What is the purpose of Node.js module.exports and how do you use it?
...n...
You can use both exports and module.exports to import code into your application like this:
var mycode = require('./path/to/mycode');
The basic use case you'll see (e.g. in ExpressJS example code) is that you set properties on the exports object in a .js file that you then import using requi...
Java Can't connect to X11 window server using 'localhost:10.0' as the value of the DISPLAY variable
... DISPLAY variable
unset DISPLAY
This helps in most cases (e.g. starting application servers or other java based tools) and avoids to modify all that many command lines.
It can also be comfortable to add it to the .bash_profile for a dedicated app-server/tools user.
...
Trim trailing spaces in Xcode
...M wiki seemed to be invalid. Instead of placing the .xcplugin in ~/Library/Application Support/Developer/Shared/Xcode/Plug-ins (as per Google's instructions) I had to put it in /Applications/Xcode.app/Contents/PlugIns and restart Xcode.
– Kristofer Sommestad
Ma...
Asp.net 4.0 has not been registered
...pnet_regiis -i and use visual studio 2010 to open project and the error disappear, but another error show, then I use Start Without Debugging then this error disappear, too.
– yu yang Jian
Dec 15 '16 at 8:37
...
How can I use “puts” to the console without a line break in ruby on rails?
...
You need to use print instead of puts. Also, if you want the dots to appear smoothly, you need to flush the stdout buffer after each print...
def print_and_flush(str)
print str
$stdout.flush
end
100.times do
print_and_flush "."
sleep 1
end
Edit: I was just looking into the reasonin...
Reading a simple text file
I am trying to read a simple text file in my sample Android Application. I am using the below written code for reading the simple text file.
...
How to Validate a DateTime in C#?
...f you only have 1 statement in that block you don't have to use them. This applies in some other languages as well but I can see how this can be misleading to newer coders.
– D.Galvez
Mar 11 '14 at 15:47
...