Author Archives: cowman.chiang

[HBase] Filters not working for negative integers

Posted on 2018 年 07 月 12 日 by cowman.chiang

[stackoverflow] HBase: Filters not working for negative integers Easility say: Since, Hbase has only BinaryComparators and not other ‘typed’ comparators, it fails to filter on Negative integers as it stores the 2’s compliment of the negative number. Further, the binary … Continue reading →

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[Shelll Script] check tomcat status

Posted on 2018 年 07 月 04 日 by cowman.chiang

!/bin/bash tomcat7=$(ps -ef | grep tomcat | wc -l) echo ${#tomcat7} if [ ${#tomcat7} -gt 0 ]; then printf “tomcat is running\n” else printf “tomcat is not running\n” fi

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[HBase] get the scan result without specific cq

Posted on 2018 年 06 月 06 日 by cowman.chiang

scan ‘TableName’, FILTER=>”QualifierFilter(!=,’binary:QUALIFY2′)”

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[JavaScript] cannot call methods on [Object] prior to initialization; attempted to call method ‘refresh’

Posted on 2018 年 05 月 29 日 by cowman.chiang

try to force initialize the object first. stackOverflow: selectmenu (‘refresh’, true)

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[Linux] more than one commands after the pipe

Posted on 2017 年 12 月 20 日 by cowman.chiang

Source: How to merge and pipe results from two different commands to single command? bash test.sh || { curl -X POST ‘https://testurl’ -d ‘{ “data”: { “type”: “type”, “content”: “測試” } }’; exit 1; }

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[Linux] use tee to write log

Posted on 2017 年 12 月 20 日 by cowman.chiang

Source: stackoverflow: How do I write stderr to a file while using “tee” with a pipe? sh test.sh 2>&1 | tee “test.log”

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[Git] remove local git tags that are not in remote

Posted on 2017 年 12 月 14 日 by cowman.chiang

git fetch –prune origin “+refs/tags/:refs/tags/” source: stockoverflow: Remove local tags that are no longer on the remote repository

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[Windows Bash Script] convert csv to html table

Posted on 2017 年 10 月 18 日 by cowman.chiang

source: How to find and replace a string in text file using batch file just replace “,” with html table tag. @echo off setlocal enabledelayedexpansion set txtfile=%~1 set newfile=Output.html if exist “%newfile%” del /f /q “%newfile%” echo ^<table border=’1’^> >> … Continue reading →

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Getting around Active Directory search size limit via ldapsearch

Posted on 2017 年 08 月 22 日 by cowman.chiang

ldapsearch -E pr=500/noprompt -v -x -LLL -h host:port -D account -w password -b “DC=base,DC=dn” -s sub “(objectClass=user)” -E pr=500/noprompt : 500 results per page, no prompt -E pr=1000/prompt : 1000 results per page, show prompt Source: Getting around Active Directory … Continue reading →

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[Java] Convert Hex to String

Posted on 2017 年 08 月 14 日 by cowman.chiang

<code> public static byte[] hexStringToByteArray(String s) { int len = s.length(); byte[] data = new byte[len / 2]; for (int i = 0; i &lt; len; i += 2) { data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) &lt;&lt; 4) + … Continue reading →

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