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Best ways to teach a beginner to program? [closed]
...erves the dual purpose of teaching the debugging tools and teaching how to ID errors without tools.
Once, or if, the project gets functional you can use it to introduce refactoring tools. Its good if you can then expand the project with some simple features which you never planned for. This usually...
git: Apply changes introduced by commit in one repo to another repo
...ter~2, which are values in the second repository you copy from) into SHA-1 identifier of commit. If you know SHA-1 of a change you want to pick, it is not necessary.
NOTE however that Git can skip copying objects from source repository, as it doesn't know that the alternate object repository is on...
Heroku/devise - Missing host to link to! Please provide :host parameter or set default_url_options[:
...
Hi sam! I am sorry but i didn't get it. I just add the line config.action_mailer.default_url_options = { :host => 'localhost' } in my env.rb but my rails 3 app crashes on heroku. Did I have to put something on the env/prod.rb too? (sorry my english...
Why does CSS not support negative padding?
...tle irritated that I have to add syntactical cruft or worse, single pixel wide single color images to get a specifically sized separator that's smaller than text height and centered vertically.
– Jason
Sep 3 '13 at 20:59
...
Is there a setting on Google Analytics to suppress use of cookies for users who have not yet given c
...ou want to proceed.
They'll leave implementation details to you, but, the idea is, once you've determined whether or not to track the user in Google Analytics, if the answer is to not track, you'd set the following property to true before Google Analytics runs:
window['ga-disable-UA-XXXXXX-Y'] = t...
What is meant by “managed” vs “unmanaged” resources in .NET?
...n) and possibly other non-.net resources on the client machine, if the provider isn't written entirely in managed code.
This is why, for something like a database connection, it's recommended you write your code thusly:
using (var connection = new SqlConnection("connection_string_here"))
{
// ...
Including Google Web Fonts link or import?
...s you likely want the <link> tag. As a rule of thumb, you want to avoid @import rules because they defer the loading of the included resource until the file is fetched.. and if you have a build process which "flattens" the @import's, then you create another problem with web fonts: dynamic prov...
What does (angle brackets) mean in Java?
...h can hold any type of data.
Example:
class A<T>{
T obj;
void add(T obj){
this.obj=obj;
}
T get(){
return obj;
}
}
public class generics {
static<E> void print(E[] elements){
for(E element:elements){
System.out.println(element...
Synchronously waiting for an async operation, and why does Wait() freeze the program here
...
The await inside your asynchronous method is trying to come back to the UI thread.
Since the UI thread is busy waiting for the entire task to complete, you have a deadlock.
Moving the async call to Task.Run() solves the issue.
Because t...
Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
I've written two ways to async load pictures inside my UITableView cell. In both cases the image will load fine but when I'll scroll the table the images will change a few times until the scroll will end and the image will go back to the right image. I have no idea why this is happening.
...