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When to use LinkedList over ArrayList in Java?
... the capacity of the underlying array, a new array (1.5 times the size) is allocated, and the old array is copied to the new one, so adding to an ArrayList is O(n) in the worst case but constant on average.
So depending on the operations you intend to do, you should choose the implementations accor...
@property retain, assign, copy, nonatomic in Objective-C
...piler will synthesize accessor methods for name.
XYZClass *obj=[[XYZClass alloc]init];
NSString *name1=[obj name]; // get 'name'
[obj setName:@"liza"]; // first letter of 'name' becomes capital in setter method
List of attributes of @property
atomic, nonatomic, retain, copy, readonly, readwrite...
Quickly find whether a value is present in a C array?
...on instead of two branches per iteration.
UPDATE:
If you're allowed to allocate the array to SIZE+1, then you can get rid of the "last entry swapping" part:
bool check(uint32_t theArray[], uint32_t compareVal)
{
uint32_t i;
theArray[SIZE] = compareVal;
for (i = 0; theArray[i] != com...
Determining memory usage of objects? [duplicate]
...
1. by object size
to get memory allocation on an object-by-object basis, call object.size() and pass in the object of interest:
object.size(My_Data_Frame)
(unless the argument passed in is a variable, it must be quoted, or else wrapped in a get call.)var...
How to declare strings in C [duplicate]
... your third example which is bad), the 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.
...
How to delete all records from table in sqlite with Android?
...se Vacuum after delete command.. db.execSQL("vacuum"); this will clear all allocated spaces..
– Ramesh_D
May 29 '14 at 9:43
6
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Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...er than array doesn't reliably exhibit the problem, since the compiler can allocate the struct on an odd address so the x member is properly aligned. With an array of two struct foo objects, at least one or the other will have a misaligned x member.)
(In this case, p0 points to a misaligned addres...
urlencode vs rawurlencode?
...ster int x, y;
unsigned char *str;
str = (unsigned char *) safe_emalloc(3, len, 1);
for (x = 0, y = 0; len--; x++, y++) {
str[y] = (unsigned char) s[x];
#ifndef CHARSET_EBCDIC
if ((str[y] < '0' && str[y] != '-' && str[y] != '.') ||
(str[y] ...
Subtract 7 days from current date
...ate = [NSDate date];
NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
[dateComponents setDay:-7];
NSDate *sevenDaysAgo = [[NSCalendar currentCalendar] dateByAddingComponents:dateComponents toDate:currentDate options:0];
NSLog(@"\ncurrentDate: %@\nseven days ago: %@", currentDate, ...
Set UIButton title UILabel font size programmatically
...he output in your xCode debugger.
Code:
NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];
NSArray *fontNames;
NSInteger indFamily, indFont;
for (indFamily=0; indFamily<[familyNames count]; ++indFamily)
{
NSLog(@"Family name: %@", [familyNames objectAtIndex:indFami...