I travel a lot so I'm down to like 30 minutes of packing per any kind of trip. I always bring one carry-on suitcase for any trips up to 2 weeks (that I never check in unless forced) -- I have an Away suitcase because it's got a built-in (removable) battery, and amazing wheels.
I was talking to a coworker recently about general techniques that almost always form the core of any effort to write very fast, down-to-the-metal hot path code on the JVM, and they pointed out that there really isn't a particularly good place to go for this information. It occurred to me that, really, I had more or less picked up all of it by word of mouth and experience, and there just aren't any good reference sources on the topic. So… here's my word of mouth.
This is by no means a comprehensive gist. It's also important to understand that the techniques that I outline in here are not 100% absolute either. Performance on the JVM is an incredibly complicated subject, and while there are rules that almost always hold true, the "almost" remains very salient. Also, for many or even most applications, there will be other techniques that I'm not mentioning which will have a greater impact. JMH, Java Flight Recorder, and a good profiler are your very best friend! Mea
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
| # patch for make ruby error | |
| # % rbenv install 1.8.7-p375 | |
| # ... | |
| # ossl_pkey_ec.c:815: error: ‘EC_GROUP_new_curve_GF2m’ undeclared (first use in this function) | |
| # ossl_pkey_ec.c:815: error: (Each undeclared identifier is reported only once | |
| # ossl_pkey_ec.c:815: error: for each function it appears in.) | |
| # make[1]: *** [ossl_pkey_ec.o] error 1 | |
| # ... | |
| # | |
| # refs: http://forums.cpanel.net/f5/case-84173-error-installing-ruby-377831.html |
| urlencode() { | |
| # urlencode <string> | |
| old_lc_collate=$LC_COLLATE | |
| LC_COLLATE=C | |
| local length="${#1}" | |
| for (( i = 0; i < length; i++ )); do | |
| local c="${1:$i:1}" | |
| case $c in |
