LexaChebara

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

LexaChebara

#find file by name in jars
find . -name "*.jar" -exec sh -c 'jar -tf {}|grep -H --label {} 'org.apache.hadoop.fs.FileSystem'' \;

LexaChebara

SELECT data_object_id,
  file_id,
  relative_fno,
  file_batch,
  MIN (start_block_id) start_block_id,
  MAX (end_block_id) end_block_id,
  SUM (blocks) blocks
FROM
  (SELECT o.data_object_id,
    e.file_id,

LexaChebara

===Notebook Fujitsu LIFEBOOK S762===
**Intel(R) Core(TM) i7-3540M CPU @ 3.00GHz**

====Java 7====

---- 8< (cut here) -----------------------------------------
Java(TM) SE Runtime Environment, 1.7.0_25-b15
Java HotSpot(TM) 64-Bit Server VM, 23.25-b01
Linux, 3.8.0-38-generic, amd64

LexaChebara

#!/bin/sh -u
#   $0 [atop logfile to plot]

log=${1-'/var/log/atop.log'}

tmp=/tmp/atop$$
rm -f $tmp
trap "rm -f $tmp" 0 1 2

atop -PCPL -r "$log" >$tmp

LexaChebara

<target name="upload">
	<input message="Enter passphrase:" addproperty="ssh.passphrase" >
		<handler classname="org.apache.tools.ant.input.SecureInputHandler" />
	</input>
	<scp todir="${ssh.username}@${ssh.host}:${ssh.path}"
         file="${file.to.copy}" trust="true"
         keyfile="${ssh.keyfile}" passphrase="${ssh.passphrase}"/>
</target>

LexaChebara

DELETE FROM T WHERE ROWID IN (
  SELECT rid
  FROM (SELECT ROWID rid, ROW_NUMBER() OVER ( PARTITION BY X ORDER BY ROWID ) rn FROM T) 
  WHERE rn > 1);