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C pointer to array/array of pointers disambiguation
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445
int* arr[8]; // An array of int pointers.
int (*arr)[8]; // A pointer to an array of integers
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Efficient evaluation of a function at every cell of a NumPy array
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164
You could just vectorize the function and then apply it directly to a Numpy array each time you ...
SVN undo delete before commit
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145
svn revert deletedDirectory
Here's the documentation for the svn revert command.
EDIT
If delet...
How do you match only valid roman numerals with a regular expression?
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You can use the following regex for this:
^M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})$
Breaking it down, M{0,4} specifies the thousands section and basically restrains it to between 0 and 4000. It's a relatively simple:
0: <empty> matched by M{0}
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How do you set your pythonpath in an already-created virtualenv?
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mdeousmdeous
14.9k77 gold badges5353 silver badges5757 bronze badges
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Creating an array of objects in Java
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This is correct.
A[] a = new A[4];
...creates 4 A references, similar to doing this:
A a1;
A a2;
A a3;
A a4;
Now you couldn't do a1.someMethod() without allocating a1 like this:
a1 = new A();
Similarly, with the array you need to do this:
a[0] = n...
How to print out more than 20 items (documents) in MongoDB's shell?
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edited Feb 6 at 9:47
Wilfred Knievel
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answ...
Correct way to find max in an Array in Swift
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Given:
let numbers = [1, 2, 3, 4, 5]
Swift 3:
numbers.min() // equals 1
numbers.max() // equals 5
Swift 2:
numbers.minElement() // equals 1
numbers.maxElement() // equals 5
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How can you encode a string to Base64 in JavaScript?
I have a PHP script that can encode a PNG image to a Base64 string.
26 Answers
26
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Can we write our own iterator in Java?
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48
Sure. An iterator is just an implementation of the java.util.Iterator interface. If you're usin...