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Why can't variables be declared in a switch statement?
... never encountered a compiler where all the stack space for a method isn't allocated when the method is entered, in 40 years.
– Marquis of Lorne
Apr 10 '17 at 8:05
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Do I set properties to nil in dealloc when using ARC?
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Short answer: no, you do not have to nil out properties in dealloc under ARC.
Long answer: You should never nil out properties in dealloc, even in manual memory management.
In MRR, you should release your ivars. Nilling out properties means calling setters, which may invoke code that...
How does Java Garbage Collection work with Circular References?
... interpreter: shell scripts typically only run for a few seconds and don't allocate much memory.
Combine your reference counting garbage collector with another garbage collector which doesn't have problems with cycles. CPython does this, for example: the main garbage collector in CPython is a refere...
Correct way to use StringBuilder in SQL
...which is usually too small and results in the StringBuilder having to do reallocations to make itself bigger (IIRC, in the Sun/Oracle JDK, it doubles itself [or more, if it knows it needs more to satisfy a specific append] each time it runs out of room).
You may have heard that string concatenation...
What is meant by “managed” vs “unmanaged” resources in .NET?
... of managed resources. A example of unmanaged resources is when we need to allocate memory from the unmanaged memory using the method Marshal.AllocHGlobal() it's an unmanaged resource in this case the best practice is uses a destructor (~ ctor) and call the Marshal.FreeHGlobal() to release this mem...
Is there a generator version of `string.split()` in Python?
...n of split() implemented via re.search() that does not have the problem of allocating too many substrings.
import re
def itersplit(s, sep=None):
exp = re.compile(r'\s+' if sep is None else re.escape(sep))
pos = 0
while True:
m = exp.search(s, pos)
if not m:
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How to use timeit module
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I can only add that how you allocate your budget of 7000 executions (e.g., .repeat(7, 1000) vs. .repeat(2, 3500) vs .repeat(35, 200) should depend on how the error due to system load compares to the error due to input variability. In the extreme case if...
Why use static_cast(x) instead of (int)x?
...4 bytes
Since this results in a 4-byte pointer pointing to 1 byte of allocated
memory, writing to this pointer will either cause a run-time error or
will overwrite some adjacent memory.
*p = 5; // run-time error: stack corruption
In contrast to the C-style cast, the static cast will...
Should IBOutlets be strong or weak under ARC?
...&& IsEmpty(self.zip.text)) {
id geocoder = [[geocoderClass alloc] init];
[geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
if (self.zip && IsEmpty(self.zip.text)) {
self.zip.text = [[pla...
Using {} in a case statement. Why?
...l switch cases.
Micro optimizations- scope for a really expensive resource allocated variable that you want to destruct as soon as you leave the scope of the case, or even a more spaghetti scenario of the "GOTO" command usage.
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