Question

我正在研究一种有效的遗传计算器，但不是我想要的哈哈。

我使用以下代码：

<?php

function getGeneArray($geneString) {
    // check the argument for fitting your needs!
    if ( strlen($geneString) % 2 == 1 ) {
         die('Supplied geneString is not made of pairs!'); // better not die - handle errors according to your application methodology
    }
    // add additional error-catching (there are only certain possible base-pairs, if something else is found you should reject the string

    $genes = array();
    $i = 0;
    while ( $i < strlen($geneString) )
    {
        $genes[] = substr($geneString, $i, 2);
        $i += 2; // Here is your mistake, you just $i++
    }
    return $genes;
}

function combinePairs($A, $B) {
    // uppercase genes build the string first, which means B must be uppercase to come first and A cant be uppercase -- no longer important
    if ($A !== $A && $B === $B) {
        return $B.$A;
    } 
    return $A.$B;
}   

$gene1 = 'bbEe';
$gene2 = 'bbEe';

$geneA = getGeneArray($gene1);
$geneB = getGeneArray($gene2);

$possibilities = array();
foreach ($geneA as $A) {
    foreach ($geneB as $B) {
        $possibilities[] = combinePairs($A, $B);
    }
}

运行上述代码的输出是：

Array ( [0] => bbbb [1] => bbEe [2] => Eebb [3] => EeEe )

实际上，我希望它是这样的：

Array ( [0] => bbee [1] => bbEe [2] => bbEE )

我能做些什么/改变以获得正确的结果？

Answer 1

使用str_split

可以稍微简化第一个函数

function getGeneArray( $str ) {
    if ( strlen( $str ) % 2 == 1 ) die('Supplied gene string is not made of pairs!');
    return str_split( $str, 2 );
}

对于combinePairs函数，它似乎只会返回$A.$B - 如果不知道计算是如何工作的，那么很难给出答案。

我不知道这是combinePairs函数应该是怎样的

function combinePairs( $A, $B ) {
    return strtolower( $A )!=$A && $B===$B ? $B.$A : $A.$B;
}

关于计算序列的可能兴趣（根据您对"uppercase genes build the string first"的评论，ctype_*系列函数可能会有用。

`ctype_lower( $str )` ~ tests if ALL characters in $str are lowercase.
`ctype_upper( $str )` ~ tests if ALL characters in $str are uppercase.
`ctype_alpha( $str )` ~ tests that all characters in $str are Alphabetic.

要测试字符串是否包含大写字符，您可以执行以下操作：

if( strtolower( $str ) != $str ){/* contains an uppercase character */}

使用遗传学计算器，没有得到我期望从我的阵列的结果

1 个答案: