有闲来无事的大佬能帮新人解释这段代码的意思嘛 最好每一行都带

click: function () {
var WorkCenter = Ext.getCmp('WorkCenter').getValue();
left.clearFilter();
left.filterBy(function (record) {
var OpCodeRight = false;
var WcCode = record.data.WcCode.toLowerCase();
if (record.data.WcCode == '') {
OpCodeRight = true;
}
var GXCodeArry = WorkCenter.replace(/(^\s*)|(\s*$)/g, '').replace(/，/g, ',').split(',');
for (var i = 0 ; i < GXCodeArry.length; i++) {
if (WcCode.indexOf(GXCodeArry[i].toLowerCase()) >= 0) {
OpCodeRight = true;
}
}
return OpCodeRight;;
});
}