len.ro v4, hugo based I wanted for a while to revive and find a new location for len.ro but it took time to find the available resources (especially time). This would be the fourth (4th) iteration: was a static site in the 2000 a Plone based site in 2006 a Wordpress based site in 2008 the 4th version is this, hugo based. My choice was based on the following:...
This is a long due project using a raspberry Pi to monitor the temperature of a cabin I’ve been building for a very long time. I’ve bought the hardware almost 4 years ago and only arrived to the point where I could use it. Motivation Beside the geek motivation the main practical motivation is to measure inside and outside temperature in order to estimate: degree of insulation and week points min temperature in order to calculate needed anti-freeze mix for heating pipes temperature monitoring for pump automation (TODO) min temperature in order to start some electric heating (TODO) accuracy of weather predictions for the location Architecture The architecture of the system is quite simple and has the following components:...
It’s been a long time since I felt such satisfaction debuging something so I decided to write about it. Let’s assume that you need to store (cache) in memory a large object tree during some operations. In practice this happens because some regulatory constraints so you end up having to parse a very large file and store the resulting object tree. Actually you have a single entry cache. You parse your object, store it in memory for search and processing while the current object tree is used....
This is a very basic pomodoro script I am using to avoid getting in a fixed position for hours at a time: <pre lang="shell"> #!/bin/bash UNIT=5 UNIT_CNT=5 PAUSE=6 notify-send -i clock "Starting interval..." for i in $(seq $UNIT_CNT); do sleep ${UNIT}m let c=$i*$UNIT notify-send -i clock "$c minutes" done (for i in $(seq $PAUSE); do let c=$PAUSE-$i+1; echo -n "Pause ${c}m"; echo -e '\f'; sleep 1m; done; echo -e '\f'; echo "Work";) | sm -
I have been spending a lot of time lately working on a new javascript based interface. As with any js project we ended up with a lot of layers. For instance for a simple numeric input there are: the html input the kendo numerictextbox the aurelia-kendo-bridge wrapper our own wrapper to allow for some level of DRY The fun part is that we needed of course some functionality which did not existed in the kendo component (adding support for financial shortcuts: 10k => 10,000)....
Fetch is the “de facto” standard now if building a new javascript code. Even if not yet supported by all browsers it is warmly recommended. There are numerous examples of usage but after reading a lot of them most of them seemed to miss the answer to my questions. These where: how to proper do error handling including having a default error handler which can be overriden how to do http POST?...
I have spend a lot of time today trying to find and fix an issue which ended up to be a fun discovery at the end. The following java error occurred when loading a pdf file from an url stream: <pre lang="java">java.io.IOException: missing CR at sun.net.www.http.ChunkedInputStream.processRaw(ChunkedInputStream.java:405) at sun.net.www.http.ChunkedInputStream.readAheadBlocking(ChunkedInputStream.java:572) at sun.net.www.http.ChunkedInputStream.readAhead(ChunkedInputStream.java:609) at sun.net.www.http.ChunkedInputStream.read(ChunkedInputStream.java:696) at java.io.FilterInputStream.read(FilterInputStream.java:133) at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3066) at sun.net.www.protocol.http.HttpURLConnection$HttpInputStream.read(HttpURLConnection.java:3060) This looked like a java lib error since java version was a bit old so the first idea was to replace the code with some apache httpClient based code to load the URL....
Purpose: drop all schema contents without dropping the user. <pre lang="sql"> DECLARE BEGIN FOR r1 IN ( SELECT 'DROP ' || object_type || ' ' || object_name || DECODE ( object_type, 'TABLE', ' CASCADE CONSTRAINTS PURGE' ) || DECODE ( object_type, 'TYPE', ' FORCE' ) AS v_sql FROM user_objects WHERE object_type IN ( 'TABLE', 'VIEW', 'PACKAGE', 'TYPE', 'PROCEDURE', 'FUNCTION', 'TRIGGER', 'SEQUENCE' ) ORDER BY object_type, object_name ) LOOP BEGIN EXECUTE IMMEDIATE r1....
There is not much to say about the new xubuntu 14.04 trusty tahr and this is a very very good thing. I had quite some work to do when installing 12.04 on my Tuxedo Laptop but with 14.04 I managed to setup almost everything in 2h on a friday night. Here is a list of just a few small hick-ups: non blocking grub error while booting from my LVM root Error: diskfilter writes are not supported....
There are many, many links, threads, bugs and discussions related to this since oracle 11g installation is no longer breeze at it was the case with oracle 10g, at least on Ubuntu. This is my short, minimal list of things to do to have oracle running on Ubuntu 14.04 12.04. Last updated 2014-05-01, install on 14.04 Last updated 2013-12-25, install on 12.04.3. 0. backup. If you have a previous oracle install backup your databases with expdp....