MEL IKFK matching code for Maya rig

//fk 2 ik
string $shoulderCON[] = `listConnections #.shoulderCON`;
string $elbowCON[] = `listConnections #.elbowCON`;
string $wristCON[] = `listConnections #.wristCON`;
string $shoulderJoint[] = `listConnections #.shoulderJoint`;
string $elbowJoint[] = `listConnections #.elbowJoint`;
string $wristJoint[] = `listConnections #.wristJoint`;
string $armCON[] = `listConnections #.armCON`;
int $time = `currentTime -q`;
currentTime -edit ($time - 1);
setKeyframe ($shoulderCON[0] + ".rotate");
setKeyframe ($elbowCON[0] + ".rotate");
setKeyframe ($wristCON[0] + ".rotate");
setKeyframe ($armCON[0] + ".ik");
currentTime -edit $time;
float $shoulder[] = `xform -q -ws -ro $shoulderJoint[0]`;
float $elbow[] = `xform -q -ws -ro $elbowJoint[0]`;
float $wrist[] = `xform -q -ws -ro $armCON[0]`;
xform -ws -ro $shoulder[0] $shoulder[1] $shoulder[2] $shoulderCON[0];
xform -ws -ro $elbow[0] $elbow[1] $elbow[2] $elbowCON[0];
xform -ws -ro $wrist[0] $wrist[1] $wrist[2] $wristCON[0];
setKeyframe ($shoulderCON[0] + ".rotate");
setKeyframe ($elbowCON[0] + ".rotate");
setKeyframe ($wristCON[0] + ".rotate");
setKeyframe ($armCON[0] + ".ik");

//ik 2 fk
string $shoulderJoint[] = `listConnections #.shoulderJoint`;
string $wristCON[] = `listConnections #.wristCON`;
string $armCON[] = `listConnections #.armCON`;
string $poleCON[] = `listConnections #.poleCON`;
string $PV_LOC[] = `listConnections #.PV_LOC`;
int $time = `currentTime -q`;
currentTime -edit ($time - 1);
setKeyframe ($armCON[0] + ".translate");
setKeyframe ($poleCON[0] + ".translate");
setKeyframe ($armCON[0] + ".ik");
currentTime -edit $time;
float $fkPOVLoc[] = `xform -q -ws -t $PV_LOC[0]`;
float $wristRot[] = `xform -q -ws -ro $wristCON[0]`;
float $wristPos[] = `xform -q -ws -t $wristCON[0]`;
xform -ws -t $wristPos[0] $wristPos[1] $wristPos[2] $armCON[0];
xform -ws -ro $wristRot[0] $wristRot[1] $wristRot[2] $armCON[0];
xform -ws -t $fkPOVLoc[0] $fkPOVLoc[1] $fkPOVLoc[2] $poleCON[0];
setKeyframe ($armCON[0] + ".translate");
setKeyframe ($armCON[0] + ".rotate");
setKeyframe ($poleCON[0] + ".translate");
setKeyframe ($armCON[0] + ".ik");