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Concept behind these four lines of tricky C code
...u see printed, only backwards. At the same time, the second element of the array becomes zero, providing null terminator, making the string suitable for passing to printf().
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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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Converting JSONarray to ArrayList
I am downloading a JSON string and converting it to JSONArray. Im putting it into a listview and need to be able to delete from that listview later, and since JSONArray has no .remove method (Thanks Obama), I am trying to convert it to an arraylist.
...
Why is C so fast, and why aren't other languages as fast or faster? [closed]
...s to say, they made the decision to put speed above safety. C won't
Check array index bounds
Check for uninitialized variable values
Check for memory leaks
Check for null pointer dereference
When you index into an array, in Java it takes some method call in the virtual machine, bound checking and ...
Thread-safe List property
...er, a workaround could be to use ConcurrentDictionary with integer TKey as array index and TValue as array value. This is recommended way of replacing list in Pluralsight's C# Concurrent Collections course. ConcurrentDictionary solves both problems mentioned above: index accessing and ordering (we c...
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, ...
Convert List to List
...urn BaseList.Contains((TFrom)(object)item); }
public void CopyTo(TTo[] array, int arrayIndex) { BaseList.CopyTo((TFrom[])(object)array, arrayIndex); }
public bool Remove(TTo item) { return BaseList.Remove((TFrom)(object)item); }
// IList
public TTo this[int index]
{
get ...
Preventing Laravel adding multiple records to a pivot table
...
You can also use the $model->sync(array $ids, $detaching = true) method and disable detaching (the second param).
$cart->items()->sync([$item->id], false);
Update:
Since Laravel 5.3 or 5.2.44, you can also call syncWithoutDetaching:
$cart->ite...
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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PostgreSQL - fetch the row which has the Max value for a column
...T
l1.*
FROM
lives AS l1
INNER JOIN (
SELECT
usr_id,
MAX(ARRAY[EXTRACT(EPOCH FROM time_stamp),trans_id])
AS compound_time_stamp
FROM
lives
GROUP BY
usr_id
) AS l2
ON
l1.usr_id = l2.usr_id AND
EXTRACT(EPOCH FROM l1.time_stamp) = l2.compound_time_stamp[...