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PHP parse/syntax errors; and how to solve them
Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
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Android buildscript repositories: jcenter VS mavencentral
...udio, it generated .gradle files with mavencentral() buildscript repositories whereas now there's jcenter() .
4 Answe...
Storyboard - refer to ViewController in AppDelegate
consider the following scenario: I have a storyboard-based app. I add a ViewController object to the storyboard, add the class files for this ViewController into the project and specify the name of the new class in the IB identity inspector. Now how am I going to refer to this ViewController program...
What is the difference between shallow copy, deepcopy and normal assignment operation?
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Normal assignment operations will simply point the new variable towards the existing object. The docs explain the difference between shallow and deep copies:
The difference between shallow and deep copying is only relevant for
compound objects (objects that contain other objects, li...
How to convert 2D float numpy array to 2D int numpy array?
How to convert real numpy array to int numpy array?
Tried using map directly to array but it did not work.
4 Answers
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What is android:weightSum in android, and how does it work?
I want to know: What is android:weightSum and layout weight, and how do they work?
9 Answers
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Difference between WAIT and BLOCKED thread states
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A thread goes to wait state once it calls wait() on an Object. This is called Waiting State. Once a thread reaches waiting state, it will need to wait till some other thread calls notify() or notifyAll() on the object.
Once this thread i...
How to delete all Annotations on a MKMapView
Is there a simple way to delete all the annotations on a map without iterating through all the displayed annotations in Objective-c?
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How to align input forms in HTML
I'm new to HTML and I'm trying to learn how to use forms.
16 Answers
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Node.js/Express.js App Only Works on Port 3000
...ss.js app running on my server that only works on port 3000 and I'm trying to figure out why. Here's what I've found:
16 An...