查找失踪阵列数量 [英] Find missing numbers in array
本文介绍了查找失踪阵列数量的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我试图找到类似以下的数组每个丢失号码。
I'm trying to find each missing number in an array like the following.
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 [5] => 6 [6] => 7 [7] => 8
[8] => 9 [9] => 10 [10] => 11 [11] => 12 [12] => 13 [13] => 14 [14] => 15 [15] => 16
[16] => 17 [17] => 18 [18] => 19 [19] => 20 [20] => 21 [21] => 22 [22] => 23
[23] => 24 [24] => 25 [25] => 26 [26] => 27 [27] => 28 [28] => 29 [29] => 30
[30] => 31 [31] => 32 [32] => 33 [33] => 34 [34] => 35 [35] => 36 [36] => 37
[37] => 38 [38] => 39 [39] => 40 [40] => 41 [41] => 42 [42] => 43 [43] => 44
[44] => 45 [45] => 46 [46] => 47 [47] => 48 [48] => 49 [49] => 50 [50] => 51
[51] => 52 [52] => 53 [53] => 54 [54] => 55 [55] => 56 [56] => 57 [57] => 58
[58] => 59 [59] => 60 [60] => 61 [61] => 62 [62] => 63 [63] => 64 [64] => 67
[65] => 68 [66] => 69 )
数字 65
, 66
缺少这种特殊的阵列中的
The numbers 65
,66
are missing in this particular array.
我的问题我怎么找出哪些号码与PHP的帮助失踪。具体是什么我需要找出是最低的失踪人数。
My question how do I figure out which numbers are missing with the help of PHP. Specifically what I need to find out is the lowest missing number.
为什么:因为当时我可以说一些分配给成员作为一个id
Why: Because then I can assign that number to a member as an id.
推荐答案
您可以使用和array_diff
和范围
功能:
// given array. 3 and 6 are missing.
$arr1 = array(1,2,4,5,7);
// construct a new array:1,2....max(given array).
$arr2 = range(1,max($arr1));
// use array_diff to get the missing elements
$missing = array_diff($arr2,$arr1); // (3,6)
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