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Most efficient way to concatenate strings in JavaScript?
In JavaScript, I have a loop that has many iterations, and in each iteration, I am creating a huge string with many += operators. Is there a more efficient way to create a string? I was thinking about creating a dynamic array where I keep adding strings to it and then do a join. Can anyone explain...
How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
I'm writing an event-driven publish/subscribe application with NodeJS and Redis. I need an example of how to notify web clients when the data values in Redis change.
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Finish an activity from another activity
...= "singleInstance"
When the user clicks new, do FirstActivity.fa.finish(); and call the new Intent.
When the user clicks modify, call the new Intent or simply finish activity B.
FIRST WAY
In your first activity, declare one Activity object like this,
public static Activity fa;
onCreate()
{
f...
What should be in my .gitignore for an Android Studio project?
What files should be in my .gitignore for an Android Studio project?
31 Answers
31
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Do I need all three constructors for an Android custom view?
...ext context, AttributeSet attrs), otherwise you will get an Exception when Android tries to inflate your View.
If you add your View from xml and also specify the android:style attribute like :
<com.mypack.MyView
style="@styles/MyCustomStyle"
...
/>
the 2nd constructor wi...
Scroll Automatically to the Bottom of the Page
...ight not scroll. In this case, you need to target the element that scrolls and use it's scroll height instead.
window.scrollTo(0,document.querySelector(".scrollingContainer").scrollHeight);
You can tie that to the onclick event of your question (i.e. <div onclick="ScrollToBottom()" ...).
Som...
Sublime Text 3, convert spaces to tabs
...for coding. Is there a way, to convert always spaces to tabs? I.e. on open and on Save files? Anyone got an idea?
11 Answer...
How to express a One-To-Many relationship in Django
I'm defining my Django models right now and I realized that there wasn't a OneToManyField in the model field types. I'm sure there's a way to do this, so I'm not sure what I'm missing. I essentially have something like this:
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How to correctly implement custom iterators and const_iterators?
I have a custom container class for which I'd like to write the iterator and const_iterator classes.
6 Answers
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How to understand nil vs. empty vs. blank in Ruby
...dly looking for a clear definition of the differences of nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come:
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