Cheng Kuan codeck
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| (funcall | |
| (lambda (fn n) | |
| (funcall fn n fn)) | |
| (lambda (n this) | |
| (cond ((> n 0) | |
| (* n (funcall this (- n 1) this))) | |
| (t 1))) | |
| 10) |
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| dpkg --add-architecture i386 | |
| apt-get update | |
| apt-get install libstdc++6:i386 |
codeck
/ backupgit.sh
Created
October 29, 2013 02:57
git backup
modify from http://sethrobertson.github.io/GitBestPractices/#backups
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| #!/bin/sh | |
| [email protected] | |
| GITPATH=gitroot | |
| cd ~/${GITPATH}_backup | |
| ls -F . | grep / > /tmp/.gitmissing1 | |
| eval ssh -n $GITHOST ls -F ${GITPATH}/. | grep / > /tmp/.gitmissing2 | |
| diff /tmp/.gitmissing1 /tmp/.gitmissing2 | egrep '^>' | | |
| while read x f; do | |
| git clone --bare --mirror ${GITHOST}:${GITPATH}/$f $f |
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| PGHOST=root@remotehost | |
| eval "ssh ${PGHOST} pg_dump -Fc webdb" > webdb-`date +%F.%H%M`.dump |
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| object jgitenv { | |
| def setup() { | |
| val jschConfigSessionFactory = new JschConfigSessionFactory() { | |
| override def createDefaultJSch(fs:FS) = { | |
| val jsch = new JSch(); | |
| try { | |
| jsch.addIdentity("..\\id_rsa"); //_.pub must exist | |
| jsch.setKnownHosts("..\\known_hosts"); | |
| } catch { |
codeck
/ gist:8192348
Created
December 31, 2013 03:50
peek specific field from a protobuf message by field numbers
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| private[this] def peakNested(fid:Int, pbs:CodedInputStream):Option[CodedInputStream] = { | |
| val (_, res) = Iterator.continually(pbs.readTag()).span{tag => | |
| (tag != 0) && (WireFormat.getTagFieldNumber(tag) != fid) && pbs.skipField(tag) | |
| } | |
| val lastid = WireFormat.getTagFieldNumber(res.next) | |
| if (lastid == fid) Some(pbs) | |
| else None | |
| } | |
| def recursivePeek[T](ids:Seq[Int], extract: (CodedInputStream=>T), pbs:CodedInputStream):Option[T] = { | |
| ids match { |
codeck
/ it.scala
Last active
January 2, 2016 13:38
— forked from Centaur/it.scala
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| val arg1 = Iterator(2, 3, 4, 8, 9, 12, 14, 17) | |
| val arg2 = Iterator(1, 2, 3, 4, 6, 8, 9, 10, 11, 12, 13, 14, 17) | |
| //??(arg1, arg2)=> Iterator((2, 4), (8, 9), (12, 12),(14, 17)) | |
| case class CeRange(start:Int, end:Option[Int]) { | |
| def passed(br: Int) = { | |
| end.map(br < _).getOrElse(true) | |
| } | |
| } |
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| def timeit[T](f:()=>T)(count:Int=1) = { | |
| val st = System.nanoTime() | |
| var ti = 0 | |
| var accu = collection.mutable.ListBuffer.empty[T] | |
| while (ti < count) { | |
| f() +=: accu | |
| ti=ti+1 | |
| } | |
| val ed = System.nanoTime() | |
| println(s"${(ed-st)/1000000} ms") |
codeck
/ tcpflow.lua
Last active
August 29, 2015 14:00
whireshark script to show how sack make throughput jitter
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| -- run by | |
| -- "C:\Program Files\Wireshark\tshark" -Q -r ftp.pcapng -X lua_script:tcpflow.lua | |
| local server = "1.1.1.1" | |
| local tap = Listener.new("tcp", "ip.addr == "..server) | |
| function gen_acc(seq) | |
| local datas = {} | |
| local sum = 0 | |
| local last_sum = 0 |
codeck
/ ledger_head.sh
Created
May 2, 2014 02:29
bash command to monitor rippled ledger fetching progresss
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| #/bin/bash | |
| # | |
| #command to monitor a rippled stared by `./rippled --fg --net` with "full ledger_history" config | |
| # | |
| while [ 1 ]; | |
| do ./rippled -q server_info|grep "complete_ledger"|egrep -o '[[:digit:]]*'|head -n1|xargs -I{} ./rippled -q ledger {} |grep close_time_human; | |
| sleep 5; | |
| done |
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