Question

我有一个带有属性坐标的对象arraylist。

我将如何展平该阵列。通过展平，我的意思是保持坐标数组，但是附加数组中的信息应该在最后的第一个数组内推送。

"checksum": "b29e57b048be1ff004de37679c6f6ea4",
"type": "LineString",
"color": "#0000ff",
"text": "",
"count": 2,
"length": 1,
"coordinates": [
  [
    [
      1245613.4845831,
      8456782.8389739
    ],
    [
      1245612.5888367,
      8456786.5712507
    ],
    [
      1245611.3945081,
      8456792.6921846
    ],
    [
      1245611.9916724,
      8456795.678006
    ]
  ],
  [
    [
      1245560.9341261,
      8456793.1400578
    ],
    [
      1245561.6805815,
      8456795.528715
    ],
    [
      1245562.2777458,
      8456797.9173721
    ],
    [
      1245564.3678208,
      8456797.9173721
    ],
    [
      1245565.7114404,
      8456802.8439774
    ]
  ],
  [
    [
      1245560.9341261,
      8456793.1400578
    ],
    [
      1245561.6805815,
      8456795.528715
    ],
    [
      1245562.2777458,
      8456797.9173721
    ],
    [
      1245564.3678208,
      8456797.9173721
    ],
    [
      1245565.7114404,
      8456802.8439774
    ]
  ]
]

我希望坐标数组排序：

"coordinates": [
    [
      [
        1245613.4845831,
        8456782.8389739
      ],
      [
        1245612.5888367,
        8456786.5712507
      ],
      [
        1245611.3945081,
        8456792.6921846
      ],
      [
        1245611.9916724,
        8456795.678006
      ],
      [
        1245560.9341261,
        8456793.1400578
      ],
      [
        1245561.6805815,
        8456795.528715
      ],
      [
        1245562.2777458,
        8456797.9173721
      ],
      [
        1245564.3678208,
        8456797.9173721
      ],
      [
        1245565.7114404,
        8456802.8439774
      ],
      [
        1245560.9341261,
        8456793.1400578
      ],
      [
        1245561.6805815,
        8456795.528715
      ],
      [
        1245562.2777458,
        8456797.9173721
      ],
      [
        1245564.3678208,
        8456797.9173721
      ],
      [
        1245565.7114404,
        8456802.8439774
      ]

    ]

Answer 1

您可以遍历嵌套值并将所有这些值合并到一个新数组中：在这里，$old是最初的coordinates嵌套数组。

$new = array();
foreach($old as $oldNest){
    $new = array_merge($new, $oldNest);
}

Answer 2

简单地迭代坐标以构建扁平化数组：

$coordinatesOnly = $original['coordinates'];
$flattenedCoordinates = [];
foreach ($coordinatesOnly as $coordinatesSet) {
  $flattenedCoordinates = array_merge($flattenedCoordinates, $coordinatesSet);
}
var_dump($flattenedCoordinates);

鉴于你原来的阵列：

$original = [
  'checksum' => 'b29e57b048be1ff004de37679c6f6ea4',
  'type' => 'LineString',
  'color' => '#0000ff',
  'text' => '',
  'count' => 2,
  'length' => 1,
  'coordinates' => [
    [
      [
        1245613.4845831,
        8456782.8389739
      ],
      [
        1245612.5888367,
        8456786.5712507
      ],
      [
        1245611.3945081,
        8456792.6921846
      ],
      [
        1245611.9916724,
        8456795.678006
      ]
    ],
    [
      [
        1245560.9341261,
        8456793.1400578
      ],
      [
        1245561.6805815,
        8456795.528715
      ],
      [
        1245562.2777458,
        8456797.9173721
      ],
      [
        1245564.3678208,
        8456797.9173721
      ],
      [
        1245565.7114404,
        8456802.8439774
      ] ],
    [
      [
        1245560.9341261,
        8456793.1400578
      ],
      [
        1245561.6805815,
        8456795.528715
      ],
      [
        1245562.2777458,
        8456797.9173721
      ],
      [
        1245564.3678208,
        8456797.9173721
      ],
      [
        1245565.7114404,
        8456802.8439774
      ]
    ]
  ]
];

你得到了你期望的东西：

array(14) {
  [0]=>
  array(2) {
    [0]=>
    float(1245613.4845831)
    [1]=>
    float(8456782.8389739)
  }
  [1]=>
  array(2) {
    [0]=>
    float(1245612.5888367)
    [1]=>
    float(8456786.5712507)
  }
  [2]=>
  array(2) {
    [0]=>
    float(1245611.3945081)
    [1]=>
    float(8456792.6921846)
  }
  [3]=>
  array(2) {
    [0]=>
    float(1245611.9916724)
    [1]=>
    float(8456795.678006)
  }
  [4]=>
  array(2) {
    [0]=>
    float(1245560.9341261)
    [1]=>
    float(8456793.1400578)
  }
  [5]=>
  array(2) {
    [0]=>
    float(1245561.6805815)
    [1]=>
    float(8456795.528715)
  }
  [6]=>
  array(2) {
    [0]=>
    float(1245562.2777458)
    [1]=>
    float(8456797.9173721)
  }
  [7]=>
  array(2) {
    [0]=>
    float(1245564.3678208)
    [1]=>
    float(8456797.9173721)
  }
  [8]=>
  array(2) {
    [0]=>
    float(1245565.7114404)
    [1]=>
    float(8456802.8439774)
  }
  [9]=>
  array(2) {
    [0]=>
    float(1245560.9341261)
    [1]=>
    float(8456793.1400578)
  }
  [10]=>
  array(2) {
    [0]=>
    float(1245561.6805815)
    [1]=>
    float(8456795.528715)
  }
  [11]=>
  array(2) {
    [0]=>
    float(1245562.2777458)
    [1]=>
    float(8456797.9173721)
  }
  [12]=>
  array(2) {
    [0]=>
    float(1245564.3678208)
    [1]=>
    float(8456797.9173721)
  }
  [13]=>
  array(2) {
    [0]=>
    float(1245565.7114404)
    [1]=>
    float(8456802.8439774)
  }
}

将嵌套数组合并为一个数组

2 个答案: