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What does “zend_mm_heap corrupted” mean
...string.h>
#include <stdlib.h>
int main(void) {
void **mem = malloc(sizeof(char)*3);
void *ptr;
/* read past end */
ptr = (char*) mem[5];
/* write past end */
memcpy(mem[5], "whatever", sizeof("whatever"));
/* free invalid pointer */
free((void*) mem[3]...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...where the error actually happens as well. Would you expect that line to be allocating a massive amount of memory? If not, try and figure out what has gone wrong...
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What does ^M character mean in Vim?
...he carriage return character. ^M happens to be the way vim displays 0xD (0x0D = 13, M is the 13th letter in the English alphabet).
You can remove all the ^M characters by running the following:
:%s/^M//g
Where ^M is entered by holding down Ctrl and typing v followed by m, and then releasing Ctr...
Programmatically Request Access to Contacts
...NAuthorizationStatusNotDetermined:
{
[[[CNContactStore alloc] init] requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
if (granted == YES)
[self showCNContactPicker];
}];
...
Creating a UICollectionView programmatically
...
- (void)viewDidLoad
{
[super viewDidLoad];
self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UICollectionViewFlowLayout *layout=[[UICollectionViewFlowLayout alloc] init];
_collectionView=[[UICollectionView alloc] initWithFrame:self.view.frame collectionV...
Differences between Proxy and Decorator Pattern
...more clear.
Proxy first:
public interface Authorization {
String getToken();
}
And :
// goes to the DB and gets a token for example
public class DBAuthorization implements Authorization {
@Override
public String getToken() {
return "DB-Token";
}
}
And there is a call...
How to write iOS app purely in C
...msgSend(objc_msgSend(objc_getClass("NSAutoreleasePool"), sel_registerName("alloc")), sel_registerName("init"));
// Notice the use of CFSTR here. We cannot use an objective-c string
// literal @"someStr", as that would be using objective-c, obviously.
UIApplicationMain(argc, argv, nil, ...
How do I wrap text in a UITableViewCell without a custom cell
...entifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.textLabel.lineBreakMode = UILineBreakModeWordWrap;
cell.textLabel.numberOfLines = 0;
cell.textLabel.font = [UIFon...
Should I store entire objects, or pointers to objects in containers?
... storing pointers into vector can be efficient if used along with a custom allocator for the pointees. The custom allocator has to take care of the cache locality, for example using placement new (see en.wikipedia.org/wiki/Placement_syntax#Custom_allocators).
– amit
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What is the difference between LL and LR parsing?
...
Predict: Based on the leftmost nonterminal and some number of lookahead tokens, choose which production ought to be applied to get closer to the input string.
Match: Match the leftmost guessed terminal symbol with the leftmost unconsumed symbol of input.
As an example, given this grammar:
S ...