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Heap vs Binary Search Tree (BST)
... explained in this answer
***: log(n) for pointer tree heap, n for dynamic array heap
Advantages of binary heap over a BST
average time insertion into a binary heap is O(1), for BST is O(log(n)). This is the killer feature of heaps.
There are also other heaps which reach O(1) amortized (stronge...
Str_replace for multiple items
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str_replace() can take an array, so you could do:
$new_str = str_replace(str_split('\\/:*?"<>|'), ' ', $string);
Alternatively you could use preg_replace():
$new_str = preg_replace('~[\\\\/:*?"<>|]~', ' ', $string);
...
How to get the day of week and the month of the year?
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Yes, you'll need arrays.
var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
var months = ['January','February','March','April','May','June','July','August','September','October','November','December'];
var ...
How to declare strings in C [duplicate]
...e different between 1 and 2 is that 1 allocates space for a pointer to the array.
But in the code, you can manipulate them as pointers all the same -- only thing, you cannot reallocate the second.
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How does the C code that prints from 1 to 1000 without loops or conditional statements work?
...inter to function returning void or returning an object type other than an array type.
So exit(j+1) works because of the automatic conversion of the function type to a pointer-to-function type, and (&exit)(j+1) works as well with an explicit conversion to a pointer-to-function type.
That bein...
How to save an HTML5 Canvas as an image on a server?
...e dataURL
binary = atob(dataURL.split(',')[1])
# Create 8-bit unsigned array
array = []
i = 0
while i < binary.length
array.push binary.charCodeAt(i)
i++
# Return our Blob object
new Blob([ new Uint8Array(array) ], type: 'image/png')
And canvas code here:
canvas = documen...
Comparing two byte arrays in .NET
...atic extern int memcmp(byte[] b1, byte[] b2, long count);
static bool ByteArrayCompare(byte[] b1, byte[] b2)
{
// Validate buffers are the same length.
// This also ensures that the count does not exceed the length of either buffer.
return b1.Length == b2.Length && memcmp(b1, ...
Symfony2 : How to get form validation errors after binding the request to the form
...rror and display {{ form_errors(form) }} within template file
access error array as $form->getErrors()
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Retrieving the inherited attribute names/values using Java Reflection
...lFields(List<Field> fields, Class<?> type) {
fields.addAll(Arrays.asList(type.getDeclaredFields()));
if (type.getSuperclass() != null) {
getAllFields(fields, type.getSuperclass());
}
return fields;
}
@Test
public void getLinkedListFields() {
System.out.prin...
Java Generics: Cannot cast List to List? [duplicate]
...
What you're seeing in the second case is array covariance. It's a bad thing IMO, which makes assignments within the array unsafe - they can fail at execution time, despite being fine at compile time.
In the first case, imagine that the code did compile, and was fol...