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Creating an object: with or without `new` [duplicate]
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Both do different things.
The first creates an object with automatic storage duration. It is created, used, and then goes out of scope when the current block ({ ... }) ends. It's the simplest way to create an object, and is just the same as when you write int x = 0;
The second creates an object...
Inverse dictionary lookup in Python
Is there any straightforward way of finding a key by knowing the value within a dictionary?
13 Answers
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Why aren't pointers initialized with NULL by default?
... developer did not do it at the declaration point was he/she needed to perform some operation and then assign.
So now we have the situation that the compiler has added an extra instruction to the code that initializes the variable to NULL then later the developer code is added to do the correct ini...
Can I change multiplier property for NSLayoutConstraint?
...ine should always be the first line. because you have to deactivate one before activating the other one. or they will conflict.
zoomedConstraint.active = YES;
[self.view layoutIfNeeded]; // or using [UIView animate ...]
Swift 5.0 version
var standardConstraint: NSLayoutConstraint!
var zoomedConst...
How to make node.js require absolute? (instead of relative)
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It requires the file as if it were required from the main js file, so it works pretty well as long as your main js file is at the root of your project... and that's something I appreciate.
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What's the difference between & and && in MATLAB?
What is the difference between the & and && logical operators in MATLAB?
7 Answers
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Rails 4: how to use $(document).ready() with turbo-links
I ran into an issue in my Rails 4 app while trying to organize JS files "the rails way". They were previously scattered across different views. I organized them into separate files and compile them with the assets pipeline. However, I just learned that jQuery's "ready" event doesn't fire on subseque...
Could not reserve enough space for object heap
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Run the JVM with -XX:MaxHeapSize=512m (or any big number as you need) (or -Xmx512m for short)
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When to use an assertion and when to use an exception
Most of the time I will use an exception to check for a condition in my code, I wonder when it is an appropriate time to use an assertion?
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How do I strip all spaces out of a string in PHP? [duplicate]
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Do you just mean spaces or all whitespace?
For just spaces, use str_replace:
$string = str_replace(' ', '', $string);
For all whitespace (including tabs and line ends), use preg_replace:
$string = preg_replace('/\s+/', '', $string);
(From her...