Using Python's built-in defaultdict we can easily define a tree data structure:
def tree(): return defaultdict(tree)
That's it!
echo "Flipping tables! (╯°□°)╯︵ ┻━┻" | |
num_rules=3 | |
real=3 # exposed to the ELB as port 443 | |
test=4 # used to install test certs for domain verification | |
health=5 # used by the ELB healthcheck | |
blue_prefix=855 | |
green_prefix=866 |
-- Decoding | |
SELECT CONVERT_FROM(DECODE(field, 'BASE64'), 'UTF-8') FROM table; | |
-- Encoding | |
SELECT ENCODE(CONVERT_TO(field, 'UTF-8'), 'base64') FROM table; |
#!/usr/bin/perl | |
# | |
# Brad's el-ghetto do-our-storage-stacks-lie?-script | |
# | |
sub usage { | |
die <<'END'; | |
Usage: diskchecker.pl -s <server[:port]> verify <file> | |
diskchecker.pl -s <server[:port]> create <file> <size_in_MB> | |
diskchecker.pl -l [port] |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
Using Python's built-in defaultdict we can easily define a tree data structure:
def tree(): return defaultdict(tree)
That's it!
Update 2022: git checkout -p <other-branch>
is basically a shortcut for all this.
FYI This was written in 2010, though I guess people still find it useful at least as of 2021. I haven't had to do it ever again, so if it goes out of date I probably won't know.
Example: You have a branch refactor
that is quite different from master
. You can't merge all of the
commits, or even every hunk in any single commit or master will break, but you have made a lot of
improvements there that you would like to bring over to master.
Note: This will not preserve the original change authors. Only use if necessary, or if you don't mind losing that information, or if you are only merging your own work.