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map.txt
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List ALl Tags in DB
===================
Map Function:
function(doc) {
if (doc.tags != null){
for(var i=0; i < doc.tags.length; i++)
{
emit(doc.tags[i], null);
}
}
}
Count Tags in DB
================
Map Function:
function(doc) {
if (doc.tags != null){
for(var i=0; i < doc.tags.length; i++)
{
emit(doc.tags[i], 1);
}
}
}
Reduce Function:
function(keys, values, rereduce){
var sum = 0;
for (var val in values){
sum += values[val];
}
return sum;
}
Group Multiple Tags
===================
Map Function:
function(doc) {
if (doc.tags != null){
for(var i=0; i < doc.tags.length; i++)
{
for(var j=0; j < doc.tags.length; j++)
{
if (doc.tags[i] != doc.tags[j]) {
emit([doc.tags[i], doc.tags[j]], 1);
}
}
}
}
}
Reduce Function:
function(keys, values, rereduce){
var sum = 0;
for (var val in values){
sum += values[val];
}
return sum;
}