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How to count the number of occurrences of an element in a List
...ot a scalable solution. Ray Hidayat is building a frequency count for each token so that each token can then be looked up. What is a better solution?
– stackoverflowuser2010
Jun 13 '13 at 4:35
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How does this milw0rm heap spraying exploit work?
...inding feature of Microsoft's XML handler, that causes heap memory to be deallocated incorrectly.
Shellcode is machine code that will run when the bug occurs. Spray and memory are just some space allocated on the heap to help the exploitable condition occur.
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Why malloc+memset is slower than calloc?
It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc , the memory is set to zero. With malloc , the memory is not cleared.
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What's the maximum value for an int in PHP?
... work with very big numbers, what's the largest int value you can store in PHP?
8 Answers
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Is std::vector so much slower than plain arrays?
...d the array only once. Note: when you resize() the vector you are not only allocating the memory but also running through the vector and calling the constructor on each member.
Re-Arranging the code slightly so that the vector only initializes each object once:
std::vector<Pixel> pixels(di...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
...cess model data after creating a new user model.
Here is how I generate a token for each new user profile using the first 4 characters of their username:
from django.dispatch import receiver
class Profile(models.Model):
auth_token = models.CharField(max_length=13, default=None, null=True, blan...
Bytes of a string in Java
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I was assuming the question was about the number of bytes allocated in memory for a String object. If the question is about the number of bytes required to serialize the String, as others have pointed out, it depends on the encoding used.
– roozbeh
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What is the meaning of the term arena in relation to memory?
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An arena is just a large, contiguous piece of memory that you allocate once and then use to manage memory manually by handing out parts of that memory. For example:
char * arena = malloc(HUGE_NUMBER);
unsigned int current = 0;
void * my_malloc(size_t n) { current += n; return arena +...
When vectors are allocated, do they use memory on the heap or the stack?
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vector<Type> vect;
will allocate the vector, i.e. the header info, on the stack, but the elements on the free store ("heap").
vector<Type> *vect = new vector<Type>;
allocates everything on the free store.
vector<Type*> vect;
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Counting Line Numbers in Eclipse [closed]
...use a batch file with the following script:
@echo off
SET count=1
FOR /f "tokens=*" %%G IN ('dir "%CD%\src\*.java" /b /s') DO (type "%%G") >> lines.txt
SET count=1
FOR /f "tokens=*" %%G IN ('type lines.txt') DO (set /a lines+=1)
echo Your Project has currently totaled %lines% lines of code.
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