大约有 15,210 项符合查询结果（耗时：0.0373秒） [XML]
What does an exclamation mark mean in the Swift language?
...
Update 3 is exactly what I'm looking for. Before reading it I thought Apple was lying when they returned something like NSURLCredential! which actually could be nil.
– Golden Thumb
Jul 16 '14 at 13:43
...
Determining complexity for recursive functions (Big O notation)
... dramatically help you understand how to calculate any method.
I recommend reading it from top to bottom to fully understand how to do it:
T(n) = T(n-1) + 1 It means that the time it takes for the method to finish is equal to the same method but with n-1 which is T(n-1) and we now add + 1 because ...
Difference between Python's Generators and Iterators
... (i for i in range(0))
For a more in-depth exposition and examples, keep reading.
A Generator is an Iterator
Specifically, generator is a subtype of iterator.
>>> import collections, types
>>> issubclass(types.GeneratorType, collections.Iterator)
True
We can create a generat...
Get type of all variables
... delays caused by round trip casts/coercions that occur when assigning and reading data to and from disk.
Ideology around R's triad typing system:
R's duck typing system has uncertainty in it. As an analogy, consider a ceramic cup, it can be used to hold a liquid, or used as a projectile like a b...
What is the “FS”/“GS” register intended for?
...ability of segment registers in 64 bit mode. There was still a need for threads to access thread local store, and each thread needed a a pointer ... somewhere in the immediately accessible thread state (e.g, in the registers) ... to thread local store. Since Windows and Linux both used FS and GS (...
Could someone explain the pros of deleting (or keeping) unused code?
...like to address your individual bullets for keeping code.
Code is already written, and efforts are spent
But if the already-written code is not in use, this is cost only without (future) value. It is effort invested in vain, and preserving the unused product of those efforts does not va...
Git Symlinks in Windows
...E '^120000' | cut -f2 ;;
(*) printf '%s\n' "$@" ;;
esac | while IFS= read -r symlink; do
case "$symlink" in
(*/*) symdir=${symlink%/*} ;;
(*) symdir=. ;;
esac
git checkout -- "$symlink"
src="${symdir}/$(cat "$symlink")"
posix_to_dos_sed='s_^/\([A-Za-z]\)_\1:_;...
How to REALLY show logs of renamed files with git?
...where their local changes now need to be applied?
– Dread Quixadhal
Aug 22 at 20:35
|
show 3 more comments
...
What are the main purposes of using std::forward and which problems it solves?
...
You have to understand the forwarding problem. You can read the entire problem in detail, but I'll summarize.
Basically, given the expression E(a, b, ... , c), we want the expression f(a, b, ... , c) to be equivalent. In C++03, this is impossible. There are many attempts, but th...
mongoose vs mongodb (nodejs modules/extensions), which better? and why?
...de faster with simple apps with simple db structure
Mongoose will make you read mongodb docs AND mongoose docs
With mongoose your stack will get one more thing to depend on and it's one more possibility to crash and burn to ashes.
mongodb driver is raw driver, you communicate directly to mongodb.
...