PHP 五 入门 分组算法（一）

PHP 5 入门 分组算法（一）

把一组数据拆分为6组输出算法

?

$groupCount = 6; //组数

$userIdList = array(1, 2, 3, 4, 5, 6, 7, 8, 9,10);

$size = count($userIdList );

$sizeGroupPer = floor($size / $groupCount );//每组被分配的个数

$criticalValue = $size % $groupCount ; //临界值
$startIndex = 0;
$endIndex = 0;
for ($i = 0; $i < $groupCount ; $i ) {?

?

??????????? if ($i < $critical) { //表示哪些组可以被多分配

?????????????? $endIndex = $startIndex $sizeGroupPer 1;

????????????} else {

??????????????? $endIndex = $startIndex $sizeGroupPer ;

????????????}

??
????????????$strGroup = "";?

??????????? for ($j = $startIndex ; $j < $endIndex; $j ) {
?????????????? if (($j 1) == $to) {
?????????????????? $strGroup .= $arryData[$j];
?????????????? } else {
?????????????????? $strGroup .= $arryData[$j].","; ???????????
?????????????? }
??????????? }

?

?????????? $startIndex = $endIndex;

???????? echo?"第 ".$i." 组数据：：".$strGroup;?

}

?