填充4阵列均匀地分布尽可能从上到下 [英] Populate 4 arrays evenly distributed as much as possible from top to bottom

问题描述

这个问题是关于这个职位
<一href=\"http://stackoverflow.com/questions/18051240/how-to-distribute-mysql-result-set-in-an-multidimensional-array-of-4-arrays\">How分发的MySQL结果在4数组的多维数组设置

我接受的答案，但现在我想做出改变到code和我不是有很多成功的...

基本上，从MySQL结果集，我需要填充4阵列分布均匀，尽可能上下...
克里斯·海耶斯提供了一个可行的solutuon，但是当我今天测试了它，我意识到它填充从左分辩的阵列，而不是从上到下...

我要如何改变code所以它填充4阵列尽可能从上到下？

  $ I = 0;
$ array_r =阵列（阵列（），（）数组，数组（），阵列（））;而（$ stmt-＆GT;取（））{
    array_push（$ array_r [$ i]，阵列（... ...值））;
    $ I =（$ I + 1）％4;
}
 

解决方案

最终版本没有操纵输入数组在所有的：

 为（$ NUM =计数（$输入），$抵消= 0; $ numBuckets大于0; $ numBuckets  -  = 1，$ NUM  -  = $ bucketSize，$胶印+ = $ bucketSize）{
  $ bucketSize = CEIL（$ NUM / $ numBuckets）;
  $输出[] = array_slice（$投入，$抵消，$ bucketSize）;
}
 

---

的透水答案的：

请尝试以下操作：

 ＆LT; PHP
$输入=范围（'A'，'Z'）; //测试输入数据
$输出=阵列（）; //输出容器
$ numBuckets = 4; //桶数量，以填补为（; $ numBuckets大于0; $ numBuckets  -  = 1）{
  $输出[] = array_splice（$输入，0，CEIL（计数（$输入）/ $ numBuckets））;
}的print_r（$输出）;
 

---

另一个版本，没有持续的复查的数组的长度

 为（$ NUM =计数（$输入）; $ numBuckets大于0; $ numBuckets  -  = 1，$ NUM  -  = $ bucketSize）{
  $ bucketSize = CEIL（$ NUM / $ numBuckets）;
  $输出[] = array_splice（$输入，0，$ bucketSize）;
}
 

This question is in relation to this post How to distribute mysql result set in an multidimensional array of 4 arrays

I got the accepted answer but now i want to make a change to the code and i'm not having a lot of success...

Basically, from a mysql result set, i need to populate 4 arrays evenly distributed as much as possible from top to bottom... Chris Hayes provided a solutuon that works, but when i tested it today, i realize that it populates the array from left to rigth, and not from top to bottom...

How do i change the code so it populates the 4 arrays as much as possible from top to bottom ?

$i = 0;
$array_r = array( array(), array(), array(), array() );

while ($stmt->fetch()) {
    array_push($array_r[$i], array(... values ...));
    $i = ($i + 1) % 4;
}

解决方案

final version without manipulating the input array at all:

for ($num = count($input), $offset = 0; $numBuckets > 0; $numBuckets -= 1, $num -= $bucketSize, $offset += $bucketSize) {
  $bucketSize = ceil($num / $numBuckets);
  $output[] = array_slice($input, $offset, $bucketSize);
}

---

pervious answer:

Try the following:

<?php
$input = range('A', 'Z'); // test input data
$output = array();        // the output container
$numBuckets = 4;          // number of buckets to fill

for (; $numBuckets > 0; $numBuckets -= 1) {
  $output[] = array_splice($input, 0, ceil(count($input) / $numBuckets));
}

print_r($output);

---

alternative version, without constant rechecking the length of the array

for ($num = count($input); $numBuckets > 0; $numBuckets -= 1, $num -= $bucketSize) {
  $bucketSize = ceil($num / $numBuckets);
  $output[] = array_splice($input, 0, $bucketSize);
}

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