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Copy a file in a sane, safe and efficient way
...duedl0r: Yes. But that's like saying "if the sun sets". You can run really fast west and you may make your day slightly longer but the sun is going to set. Unless you have bug and leak memory (it will go out of scope). But since there is no dynamic memory management here there can not be a leak and ...
How to append rows to an R data frame
...ata.frame.
Continuing with Julian's f3 (a preallocated data.frame) as the fastest option so far, defined as:
# pre-allocate space
f3 <- function(n){
df <- data.frame(x = numeric(n), y = character(n), stringsAsFactors = FALSE)
for(i in 1:n){
df$x[i] <- i
df$y[i] <- toString(...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...are two variants, DER (binary) encoding and PEM (ascii) encoding. Both are fast, but DER is faster and more size efficient of the two. In fact ASN.1 DER can easily keep up (and sometimes beat) serializers that were designed 30 years after itself, a testament to it's well engineered design. It's very...
Fastest Way of Inserting in Entity Framework
I'm looking for the fastest way of inserting into Entity Framework.
30 Answers
30
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How would you implement an LRU cache in Java?
...ue
Frequently used keys will be at the top so the search could be fast.
*/
if ( oldValue != null ) {
queue.removeFirstOccurrence ( key );
}
queue.addFirst ( key );
if ( map.size () > limit ) {
final KEY removedKey = queue....
What's the equivalent of use-commit-times for git?
... For lots of files (eg big repos like the kernel), it's not going to be as fast as just switching branches, but havign a second copy of the working tree can be quite powerful.
do the same thing with just a tar-ball instead, if you want to
git archive --format=tar --prefix=new-tree/ <bra...
Generate all permutations of a list without adjacent equal elements
...s, perms))
slow = {perm for perm in perms if defects(perm) == opt}
fast = set(enum(lst))
print(lst, fast, slow)
assert slow == fast
for r in range(10000):
test([randrange(3) for i in range(randrange(6))])
...
How to merge the current branch into another branch
...current branch into another branch without checking out the other branch:
Fast-forward merge
This is really easy. By definition, a fast-forward merge simply means the branch pointer is moved ahead in the commit tree. So all you need to do is just simulate that:
git branch -f master dev
Cavea...
Making the Android emulator run faster
... For some devices, like the Motorola Droid and the Nexus One, the app runs faster in the actual device than the emulator. This is a problem when testing games and visual effects.
...
Render HTML to an image
...based on wkhtmltoimage)
python-webkit2png
...
Pros
Conversion is quite fast most of the time
Cons
Bad rendering
Does not execute javascript
No support for recent web features (FlexBox, Advanced Selectors, Webfonts, Box Sizing, Media Queries, ...)
Sometimes not so easy to install
Complicated ...