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Parsing Visual Studio Solution files
... edit the post to include this twice but just got shot down in flames each time.
– oasten
Jul 28 '14 at 13:39
3
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How accurate is python's time.sleep()?
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The accuracy of the time.sleep function depends on your underlying OS's sleep accuracy. For non-realtime OS's like a stock Windows the smallest interval you can sleep for is about 10-13ms. I have seen accurate sleeps within several millisecond...
How do I get a background location update every n minutes in my iOS application?
...the Apple Developer Forums:
Specify location background mode
Create an NSTimer in the background with UIApplication:beginBackgroundTaskWithExpirationHandler:
When n is smaller than UIApplication:backgroundTimeRemaining it will work just fine. When n is larger, the location manager should be enable...
How does collections.defaultdict work?
...tation-specific behaviour - in both cases a new instance is "created" each time with int() or list(). That way, d[k].append(v) can work without filling the dictionary with references to the same list, which would render defaultdict almost useless. If this were the behaviour, defaultdict would take a...
hash function for string
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Wikipedia shows a nice string hash function called Jenkins One At A Time Hash. It also quotes improved versions of this hash.
uint32_t jenkins_one_at_a_time_hash(char *key, size_t len)
{
uint32_t hash, i;
for(hash = i = 0; i < len; ++i)
{
hash += key[i];
hash +...
How different is Objective-C from C++? [closed]
...ispatch, allowing the class responding to a message to be determined at runtime, unlike C++ where the object a method is invoked upon must be known at compile time (see wilhelmtell's comment below). This is related to the previous point.
Objective-C allows autogeneration of accessors for member va...
How can I check if a file exists in Perl?
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-B
File is a “binary” file (opposite of -T).
-M
Script start time minus file modification time, in days.
-A
Same for access time.
-C
Same for inode change time (Unix, may differ for other platforms)
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Is multiplication and division using shift operators in C actually faster?
...ence of shifts & adds in microcode.
Bottom line--don't spend a lot of time worrying about this. If you mean to shift, shift. If you mean to multiply, multiply. Do what is semantically clearest--your coworkers will thank you later. Or, more likely, curse you later if you do otherwise.
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...), %r11
movq 24(%rbx,%rdx,8), %rbp
addq $4, %rdx
# This time reuse "rax" for all the popcnts.
popcnt %r9, %rax
add %rax, %rcx
popcnt %r10, %rax
add %rax, %rsi
popcnt %r11, %rax
add %rax, %r8
popcnt %rbp, %rax
add %rax, %rdi
cmpq ...
When should the xlsm or xlsb formats be used?
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.xlsx loads 4 times longer than .xlsb and saves 2 times longer and has 1.5 times a bigger file. I tested this on a generated worksheet with 10'000 rows * 1'000 columns = 10'000'000 (10^7) cells of simple chained =…+1 formulas:
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