雙迴路去除物品

Question

我想從給定的條件字典中刪除單詞。 我想這樣做，在下一次迭代時，字典將計算新的一個，最後一項刪除，所以它不會再計算。

// sample data 
    $dict = ['aaa', 'aaan','aba', 'abat', 'ime', 'iso', 'nime', 'tiso',]; 
    $unique = ['abatiso', 'aaanime']; 

    // could use while to further optimize unset (and remove on the fly) http://php.net/manual/en/control-structures.foreach.php#88578 
    while (list($key_word, $word) = each($unique)) { // $key is unused, just for the optimization that the whille provides 
     foreach ($dict as $key_other => $other) { 

// ... conditions calculations 

     unset($unique[$key_word]); 
} 
} 
    echo "n compounds: " . count($compounds) . NL; 

如果我設置內部循環而不是foreach作爲外部，我得到0結果，它立即終止。

現在，我得到重複的結果，如：

   // Removed: abatiso => wc: aba + tiso = abatiso 
       // Removed: abatiso => wc: abat + iso = abatiso 
       // Removed: abatiso => wc: abati + so = abatiso 
       // Removed: abatiso => wc: abatis + o = abatiso 

我怎樣才能使它所以它刪除的話，不會對下一個迭代再次proccess呢？

一些測試數據：

Removed: aaaaaah => wc: aaaa + aah = aaaaaah 
Removed: aaaaaah => wc: aaaaaa + h = aaaaaah 
Removed: aaaaargh => wc: aaa + aargh = aaaaargh 
Removed: aaaalead => wc: aaaa + lead = aaaalead 
Removed: aaabbbccc => wc: aaab + bbccc = aaabbbccc 
Removed: aaacomix => wc: aaa + comix = aaacomix 
Removed: aaagak => wc: aaa + gak = aaagak 
Removed: aaahh => wc: aaa + hh = aaahh 
Removed: aaainc => wc: aaa + inc = aaainc 
Removed: aaainc => wc: aaai + nc = aaainc 
Removed: aaanet => wc: aaa + net = aaanet 
Removed: aaanet => wc: aaan + et = aaanet 
Removed: aaanime => wc: aaa + nime = aaanime 
Removed: aaanime => wc: aaan + ime = aaanime 
Removed: aaaron => wc: aaa + ron = aaaron 
Removed: aabbcc => wc: aab + bcc = aabbcc 
Removed: aabmup => wc: aab + mup = aabmup 
Removed: aabre => wc: aab + re = aabre 
Removed: aabybro => wc: aaby + bro = aabybro 
Removed: aacap => wc: aac + ap = aacap 
Removed: aacap => wc: aaca + p = aacap 
Removed: aaccording => wc: aac + cording = aaccording 
Removed: aacd => wc: aac + d = aacd 
Removed: aachener => wc: aach + ener = aachener 
Removed: aachener => wc: aachen + er = aachener 
Removed: aacisuan => wc: aaci + suan = aacisuan 
Removed: aacisuan => wc: aacis + uan = aacisuan 
Removed: aacult => wc: aac + ult = aacult 

我不使用內環內休息，因爲我必須做的計算也

。

Answer 1

代碼有錯誤。您在兩個地方設置了兩個不同含義的$key值。起初，您將其分配在list(..聲明中，然後再次在foreach循環中作爲$dict中值的鍵值保留。

作爲一條經驗法則，當您遍歷該列表時，從列表中取消設置元素永遠不會好。您最好將您在列表中處理的項目保存在列表中，而不要再次處理它們。如果你想要你可以稍後刪除這些項目，後你完成了循環過unique。

如果我明白你的問題正確，這將是很長的路要走：

$toUnset = []; 
foreach ($unique as $key => $word) { 
    if (!in_array($word, $toUnset)) { 
     foreach ($dict as $other) { 

      //do your processing 
      $toUnset[] = $word; 
     } 
    } 
}