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What is the difference between Caching and Memoization?
...cific form of caching that involves caching the return value of a function based on its parameters.
Caching is a more general term; for example, HTTP caching is caching but not memoization.
Wikipedia says:
Although related to caching, memoization refers to a specific case of this optimization...
NSOperation vs Grand Central Dispatch
...
GCD is a low-level C-based API that enables very simple use of a task-based concurrency model. NSOperation and NSOperationQueue are Objective-C classes that do a similar thing. NSOperation was introduced first, but as of 10.5 and iOS 2, NSOperati...
Iterate over the lines of a string
...
1000 loops, best of 3: 406 usec per loop
not quite as good as the .find based approach -- still, worth keeping in mind because it might be less prone to small off-by-one bugs (any loop where you see occurrences of +1 and -1, like my f3 above, should automatically trigger off-by-one suspicions -- ...
git rebase without changing commit timestamps
Would it make sense to perform git rebase while preserving the commit timestamps?
5 Answers
...
The current SynchronizationContext may not be used as a TaskScheduler
...ublic override void Send(SendOrPostCallback d, object state)
{
base.Send(d, state);
}
public override void OperationStarted()
{
base.OperationStarted();
}
public override void OperationCompleted()
{
base.OperationCompleted();
}
public stat...
How do I enable C++11 in gcc?
....
{
"shell_cmd": "g++ \"${file}\" -std=c++1y -o \"${file_path}/${file_base_name}\"",
"file_regex": "^(..[^:]*):([0-9]+):?([0-9]+)?:? (.*)$",
"working_dir": "${file_path}",
"selector": "source.c, source.c++",
"variants":
[
{
"name": "Run",
"sh...
See “real” commit date in github (hour/day)
... permanently without hovering (e.g. for screenshots), the above Javascript-based solutions do not match the latest Github HTML (see comments). And they did not take into account the fact that the timestamps are auto-updated based on a timer ("X minutes ago" has to change every minute), so they will ...
How to combine paths in Java?
...
Rather than keeping everything string-based, you should use a class which is designed to represent a file system path.
If you're using Java 7 or Java 8, you should strongly consider using java.nio.file.Path; Path.resolve can be used to combine one path with anot...
Shell script to send email [duplicate]
...JECT} | file -bi - | cut -d"=" -f2)
SUB_B64=$(echo ${SUBJECT} | uuencode --base64 - | tail -n+2 | head -n+1)
NB_FILES=$(echo ${FILES} | wc -w)
NB=0
cat <<EOF | /usr/sbin/sendmail -t
From: ${FROM}
To: ${TO}
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=frontier
Subject: =?${SUB_CHA...
通信连接组件 · App Inventor 2 中文网
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SimpleBase64 拓展
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MqttClient 拓展
ClientSocket 拓展
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