Difference between revisions of "Template:Groningen/dna js"

(Created page with "var DNA = {}; (function(){ var bases = 'ACTG'; var encodeUInt = function(num){ num = Math.floor(num); // truncate to int num = num < 0 ? -num : num; // make positive...")
 
 
(One intermediate revision by the same user not shown)
Line 4: Line 4:
 
var bases = 'ACTG';
 
var bases = 'ACTG';
 
 
−
var encodeUInt = function(num){
+
var encodeUInt = function(num, len){
 
num = Math.floor(num); // truncate to int
 
num = Math.floor(num); // truncate to int
 
num = num < 0 ? -num : num; // make positive
 
num = num < 0 ? -num : num; // make positive
Line 11: Line 11:
 
 
 
while(num){ // != 0
 
while(num){ // != 0
−
ret += bases[num & 3]; // lowest 2 bits as index to the base-pairs
+
ret += bases[num % 4]; // lowest 2 bits as index to the base-pairs
−
num = num >>> 2; // shift in next 2 bits
+
num = Math.floor(num / 4); // shift in next 2 bits
 +
}
 +
 +
while(ret.length < len){
 +
ret += 'A';
 
}
 
}
 
 
Line 33: Line 37:
 
 
 
return ret;
 
return ret;
−
};
 
−
 
−
var padUInt = function(dna, len){
 
−
while(dna.length < len){
 
−
dna += 'A';
 
−
}
 
−
return dna;
 
 
};
 
};
 
 
 
DNA = {
 
DNA = {
 
'encodeUInt': encodeUInt,
 
'encodeUInt': encodeUInt,
−
'decodeUInt': decodeUInt,
+
'decodeUInt': decodeUInt
−
'padUInt': padUInt
+
 
};
 
};
 
})();
 
})();

Latest revision as of 11:51, 26 August 2016

var DNA = {};

(function(){ var bases = 'ACTG';

var encodeUInt = function(num, len){ num = Math.floor(num); // truncate to int num = num < 0 ? -num : num; // make positive

var ret = num ?  : 'A'; // 0 -> A

while(num){ // != 0 ret += bases[num % 4]; // lowest 2 bits as index to the base-pairs num = Math.floor(num / 4); // shift in next 2 bits }

while(ret.length < len){ ret += 'A'; }

return ret; };

var decodeUInt = function(dna){ var ret = 0;

for(var i = 0; i < dna.length; i++){ ret *= 4; // shift first (does nothing first time)

var idx = bases.indexOf(dna[dna.length - i - 1]); if(idx === -1){ // not a base-pair return null; }

ret += idx; }

return ret; };

DNA = { 'encodeUInt': encodeUInt, 'decodeUInt': decodeUInt }; })();