数组，如何显示“更改值”只要 [英] Array, how to display the "changing values" only

问题描述

假设我有一个日期和季节的数组，每天有一个条目。

数组看起来像这样：

pre> 2009-10-28 00:00:00（好季节）

2009-10-29 00:00:00（好季节）

2009-10-30 00:00:00（好季节）

2009-10-31 00:00:00（好季节）

2009 -11-01 00:00:00（好季节）

2009-11-02 00:00:00（不良季节）

2009-11-03 00： 00:00（不好的季节）

2009-11-04 00:00:00（不好的季节）

2009-11-05 00:00:00（不好的季节）


解决方案

循环播放，保留上个赛季的记录：

  $ lastSeason =''; 
 $ b $ foreach（$ array为$ date => $ season）
 {
 if（$ season！= $ lastSeason）
 echoSeason changed on。 $日期; 
 
 $ lastSeason = $ season; 
} 
  

Let's say I have an array with dates and seasons, there is one entry for each day. I would like to print the array row only when the season value is changing.

the array look like that:

2009-10-28 00:00:00 (good season)  

2009-10-29 00:00:00 (good season) 

2009-10-30 00:00:00 (good season) 

2009-10-31 00:00:00 (good season) 

2009-11-01 00:00:00 (good season) 

2009-11-02 00:00:00 (bad season) 

2009-11-03 00:00:00 (bad season) 

2009-11-04 00:00:00 (bad season) 

2009-11-05 00:00:00 (bad season) 

解决方案

Loop through, keeping a record of the last season:

$lastSeason = '';

foreach ($array as $date => $season)
{
    if ($season != $lastSeason)
        echo "Season changed on " . $date;

    $lastSeason = $season;
}

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