《JavaScript高级程序设计》阅读笔记（十九）：表格排序

排序代码

function SortTable(sTableID, iCol, sDataType){

    this.oTable=document.getElementById(sTableID);

    this.oTBody=this.oTable.tBodies[0];

    this.colDataRows=this.oTBody.rows;

    this.aTRs=[];

    this.iCol=iCol;

    this.sDataType=sDataType;

}



SortTable.prototype={

    convert:function(sValue, sDataType){

        switch(sDataType){

            case "int":

                return parseInt(sValue);

            case "float":

                return parseFloat(sValue);

            case "date":

                return new Date(sValue);

            default:

                return sValue.toString();

        }

    },

    generateCompareTRs:function(iCol, sDataType, that){

        return function compareTRs(oTR1,oTR2){

                    var vValue1= that.convert(oTR1.cells[iCol].firstChild.nodeValue, sDataType),

                        vValue2= that.convert(oTR2.cells[iCol].firstChild.nodeValue, sDataType);

                    if(vValue1 < vValue2){

                        return -1;

                    } else if(vValue1 > vValue2){

                        return 1;

                    } else{

                        return 0;

                    }

               };

    },

    sort:function(){

        for(var i=0,l=this.colDataRows.length;i<l;i++){

            this.aTRs.push(this.colDataRows[i]);

        }

        if(this.oTable.sortCol === this.iCol){

            this.aTRs.reverse();

        } else {

            this.aTRs.sort(this.generateCompareTRs(this.iCol, this.sDataType, this));

        }



        var oFragment=document.createDocumentFragment();

        for(var i=0,l=this.aTRs.length;i<l;i++){

            oFragment.appendChild(this.aTRs[i]);

        }



        this.oTBody.appendChild(oFragment);

        this.oTable.sortCol = this.iCol;

    }

}

调用示例

function bindSortTable(sTableID, iCol, sDataType){

    var table=document.getElementById(sTableID),

        ftr=table.tHead.rows[0],

        tds=ftr.cells;

    if(tds[iCol]){

        tds[iCol].onclick=function(){

            var sortTable=new SortTable(sTableID, iCol, sDataType);

            sortTable.sort();

        }

    }

}



window.onload=function(){

    bindSortTable("tblSort",0);

    bindSortTable("tblSort",1);

    bindSortTable("tblSort",2,"int");

    bindSortTable("tblSort",3,"float");

    bindSortTable("tblSort",4,"date");

}

将table中的td顺序颠倒

function reverseTD(tbid){

    var table=document.getElementById(tbid),

        tbody=table.tBodies[0],

        trs=tbody.rows,

        cols=[];

    for(var i=0,j=trs.length;i<j;i++){

        cols = trs[i].cells;

        trs[i]=document.createElement("tr");

        for(var m=cols.length-1;m>=0;m--){

            trs[i].appendChild(cols[m]);

        }

    }

}



//Test

reverseTD("tableid");