Sunday, June 6, 2010

Erjang on OSX 10.6.x

A few obstacles I was having when trying to setup Erjang on OSX 10.6.x
1. Perl version
Erjang requires perl 5.10.0, and the default perl on the system is 5.8.x.
Perl 5.10.x is installed on the system however, so all I have to do is to modify build.xml,
replacing executable="perl" with executable="perl5.10.0"
2. Erlang environment vars
To make it easy, I add a soft link /sw that points to /opt/local

Then I can just do
./erl.sh -pa ./src/main/erl -noshell -s ring main

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Wednesday, May 19, 2010

Dojo generate colors

The one that I want is in

dojox.color.Generator.monochromatic ({ base:myColor, num:6 })
http://bugs.dojotoolkit.org/browser/dojox/trunk/color/Generator.js?rev=14628

This monochromatic function does NOT do what I want
dojo.require("dojox.color.Palette");
var colors = dojox.color.Palette.generators.monochromatic ({ base:myColor, num:6 });
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Tuesday, May 18, 2010

Dojo How to ColorPalette + TooltipDialog + DropDownButton

function changeColor(selectColor) {
console.log("color: " + selectColor);
}

dojo.addOnLoad( function() {
var censusContainer = new dijit.layout.BorderContainer({
style: "width: 30%; height: 30%",
gutters: false,
design: "headline"
},"censusContainerId");


var paramsContent = new dijit.layout.ContentPane();
var colorPalette = new dijit.ColorPalette({onChange:changeColor});
var colorPalette2 = new dijit.ColorPalette({onChange:changeColor});
censusContainer.addChild(colorPalette);
var dropDownButton = new dijit.form.DropDownButton({label: "drop", dropDown: colorPalette2});
censusContainer.addChild(dropDownButton);
censusContainer.startup();
}

HTML:

<body class="tundra">
<div id="censusContainerId" region="top" >Region top</div>
<div dojoType="dijit.ColorPalette" onChange="changeColor"></div>
</body>
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Thursday, May 13, 2010

Erlang parse file

Trying to parse csv file with the following contents

INTC,07-May-2010 16:51,21.31,21.31,21.31,21.31,200\n
INTC,07-May-2010 16:47,21.31,21.31,21.31,21.31,100\n
INTC,07-May-2010 16:42,21.31,21.31,21.31,21.31,300\n

The erlang code


getCompanyEff(Filename,Company) ->
{ok,Device} = file:open(Filename,read),
getLinesCompany(Device,[],Company).

getLinesCompany(Device,Accum,Company) ->
case io:get_line(Device,"") of
eof -> Accum;
Line ->
case regexp:first_match(Line, Company ++ ",*") of
{match,_,_} -> getLinesCompany(Device, [Line|Accum], Company);
nomatch -> getLinesCompany(Device, Accum, Company)
end
end.

and to execute:
erl> module:getCompanyEff("/path/to/file", "CompanyName").
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Monday, May 10, 2010

HTML 5 postMessage (Cross-Domain Message) on Firefox 3.6.3

This only works in Firefox because IE uses attachEvent(). You can always use dojo.connect( window, 'message', func() ) so it works in Firefox and IE.

A (http://localhost/cross.htm) has an iframe containing B (http://otherdomain/cross.htm)

After the iframe is loaded in A, then a message is sent to it (containing string 'Hello'). The origin is checked in B, and if it matches an alert is displayed.

on A (http://localhost/cross.htm)
<script type="text/javascript">
function iframeload() {
var o = document.getElementById('crossid').contentWindow;
o.postMessage('Hello', "http://otherdomain/cross.htm");
}
</script>

<iframe id="crossid" onload="iframeload();" src="http://otherdomain/cross.htm" width="700px" height="700px">
</iframe>


on B (http://otherdomain/cross.htm)
window.addEventListener('message',function(e) {
if (e.origin == 'http://localhost') {
if (e.data == 'Hello') {
alert(e.data);
e.source.postMessage('Hello');
} else {
alert(e.data);
}
}
}, false);
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Friday, May 7, 2010

Javascript for loop + closure

This for loop uses closure to get the value of i for every iteration.
Without closure, every element in divvar will get the last value of x(length-1) from iteration.

for( var i=0;i<divvar.length;i++ ) {
(
function(x) { // -> capture looping variable
divvar[x].onclick = function() {
console.debug("clicked:", x);
}
}
)(i); // -> pass in looping variable
}

Compare this to the standar loop without closure

for( var i=0;i<divvar.length;i++ ) {
divvar[i].onclick = function() {
console.debug("clicked:", i);
};
}

Or we can use dojo.forEach to fix this
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Thursday, May 6, 2010

ESRI ArcXML get service info

HTTP POST to http://xxx/IMS/servlet/com.esri.esrimap.Esrimap?ServiceName=six_combo&CustomService=query

ARCXML service info:

<?xml version="1.0" encoding="UTF-8"?>
<ARCXML version="1.1">
<REQUEST>
<GET_SERVICE_INFO fields="false" envelope="false" renderer="false" extensions="true" acetateinfo="false" />
</REQUEST>
</ARCXML>

The response:
<?xml version="1.0" encoding="UTF-8"?>
<ARCXML version="1.1">
<RESPONSE>
<SERVICEINFO>
<ENVIRONMENT>
<LOCALE language="en" country="AU" />
<UIFONT name="Arial" color="0,0,0" size="12" style="regular" />
<SEPARATORS cs=" " ts=";"/>
<CAPABILITIES forbidden="" disabledtypes="" returngeometry="xmlmode"/>
<SCREEN dpi="74"/>
</ENVIRONMENT>
<PROPERTIES>
<FEATURECOORDSYS string="GEOGCS["GCS_GDA_1994",DATUM["D_GDA_1994",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]" id="4283" />
<FILTERCOORDSYS string="GEOGCS["GCS_GDA_1994",DATUM["D_GDA_1994",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]" id="4283" />
<ENVELOPE minx="140.05983881892" miny="-37.740334035" maxx="154.575951211079" maxy="-27.924909045" name="Initial_Extent" />
<ENVELOPE minx="140.05983881892" miny="-37.740334035" maxx="154.575951211079" maxy="-27.924909045" name="Extent_Limit" />
<MAPUNITS units="decimal_degrees" />
<LEGEND/>
</PROPERTIES>
<LAYERINFO type="featureclass" visible="true" name="Suburb Labels" id="Suburb_Label_1" minscale="0.0000308686210057027" maxscale="0.000308686210057027">
<FCLASS type="polygon">
<FIELD name="delivsdm:geodb.Suburb.cadid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.modifieddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.suburbname" type="12" size="40" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.postcode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.state" type="5" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Local Government Area Labels" id="LocalGovernmentArea_Label_1" minscale="0.000246948968045622" maxscale="0.000926058630171081">
<FCLASS type="polygon">
<FIELD name="delivsdm:geodb.LocalGovernmentArea.cadid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.modifieddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.lganame" type="12" size="60" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.councilname" type="12" size="80" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.abscode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.ltocode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.vgcode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.wbcode" type="4" size="10" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="false" name="Locality Labels" id="Locality_Label_1" maxscale="0.0000000308686210057027">
<FCLASS type="point">
<FIELD name="delivsdm:geodb.placepoint.topoid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.objectmoddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.featuremoddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.classsubtype" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.featurereliabilitydate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.attributereliabilitydate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.capturesourcecode" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.capturemethodcode" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.planimetricaccuracy" type="6" size="6" precision="2" />
<FIELD name="delivsdm:geodb.placepoint.verticalaccuracy" type="6" size="6" precision="2" />
<FIELD name="delivsdm:geodb.placepoint.operationalstatus" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.generalnameoid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.generalname" type="12" size="50" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.alternativelabel" type="12" size="50" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.placetype" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.population" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.popsourcedate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.placesignificance" type="5" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.placepoint.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
<EXTENSION type="StoredQuery">
<STOREDQUERIES>
<STOREDQUERY name="generalname">
<QUERY subfields="" where="generalname LIKE '[%var%]%'" >
</QUERY>
<SQVAR name="[%var%]" position="0">
<FIELD name="delivsdm:geodb.placepoint.generalname" type="12" />
</SQVAR>
</STOREDQUERY>
</STOREDQUERIES>
</EXTENSION>

</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Road Labels" id="RoadSegment_Label_1">
<FCLASS type="line">
<FIELD name="delivsdm:geodb.RoadSegment.topoid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.objectmoddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.featuremoddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.classsubtype" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.featurereliabilitydate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.attributereliabilitydate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.capturesourcecode" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.capturemethodcode" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.planimetricaccuracy" type="6" size="6" precision="2" />
<FIELD name="delivsdm:geodb.RoadSegment.verticalaccuracy" type="6" size="6" precision="2" />
<FIELD name="delivsdm:geodb.RoadSegment.operationalstatus" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.roadnameoid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.roadnamebase" type="12" size="50" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.roadnametype" type="12" size="20" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.roadnamesuffix" type="12" size="10" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.functionhierarchy" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.roadontype" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.surface" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.lanecount" type="5" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.RoadSegment.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Town Labels" id="Town_Label_1" minscale="0.000246948968045622">
<FCLASS type="point">
<FIELD name="OBJECTID" type="8" size="10" precision="0" />
<FIELD name="NAME" type="12" size="32" precision="0" />
<FIELD name="POSTCODE" type="8" size="10" precision="0" />
<FIELD name="POP_1996" type="8" size="10" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="#ID#" type="-99" size="16" precision="0" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Local Government Area" id="LocalGovernmentArea_1" minscale="0.000246948968045622" maxscale="0.000926058630171081">
<FCLASS type="polygon">
<FIELD name="delivsdm:geodb.LocalGovernmentArea.cadid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.modifieddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.lganame" type="12" size="60" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.councilname" type="12" size="80" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.abscode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.ltocode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.vgcode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.wbcode" type="4" size="10" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.LocalGovernmentArea.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Suburbs" id="Suburb_1" minscale="0.0000308686210057027" maxscale="0.000308686210057027">
<FCLASS type="polygon">
<FIELD name="delivsdm:geodb.Suburb.cadid" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.createdate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.modifieddate" type="91" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.suburbname" type="12" size="40" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.postcode" type="4" size="10" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.state" type="5" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.Suburb.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="Topographic Map Index" id="Topographic_Map_Index_1" maxscale="0.000617372420114054">
<FCLASS type="polygon">
<FIELD name="delivsdm:geodb.topomapindex.mapnumber" type="12" size="10" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.maptitle" type="12" size="32" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.nominalpresentationscale" type="4" size="8" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.mgazone" type="5" size="5" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.hundredkmapnumber" type="4" size="5" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.presentationformat" type="5" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="delivsdm:geodb.topomapindex.objectid" type="-99" size="16" precision="0" />
<FIELD name="SE_Area(shape)" type="8" size="16" precision="8" />
<FIELD name="SE_Length(shape)" type="8" size="16" precision="8" />
</FCLASS>
</LAYERINFO>

<LAYERINFO type="featureclass" visible="true" name="NSW Border" id="Border_1" minscale="0.00617372420114054">
<FCLASS type="line">
<FIELD name="IGDS_CLASS" type="4" size="5" precision="0" />
<FIELD name="IGDS_COLOR" type="4" size="5" precision="0" />
<FIELD name="GROUP" type="4" size="5" precision="0" />
<FIELD name="IGDS_STYLE" type="4" size="5" precision="0" />
<FIELD name="WEIGHT" type="4" size="5" precision="0" />
<FIELD name="#SHAPE#" type="-98" size="0" precision="0" />
<FIELD name="#ID#" type="-99" size="16" precision="0" />
</FCLASS>
</LAYERINFO>

</SERVICEINFO>
</RESPONSE>
</ARCXML>
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