如何遍历数组以获取 jquery 属性？

Question

I have some fields that I want to hide if they are null. I am able to do this with:

if (json[0].incendio_edificio == null) {
  $("#dIncendio_edificio").parent().parent().hide();
}

if (json[0].hvct_edificio == null) {
  $("#dHvct_edificio").parent().parent().hide();
}

if (json[0].granizo_edificio == null) {
  $("#dGranizo_edificio").parent().parent().hide();
}

What I want to do is put the fields inside a matrix and do the conditional inside a loop, like this:

const campos_poliza = [
                         [json[0].incendio_edificio, $("#dIncendio_edificio")],
                         [json[0].hvct_edificio, $("#dHvct_edificio")],
                         [json[0].granizo_edificio, $("#dGranizo_edificio")],
                      ];

for (var x in campos_poliza){
  if (x[0] == null) {
    x[1].parent().parent().hide();
  }
}

This doesn´t give any errors but it keeps showing null fields. How can I achieve this? The html is:

<div class="row">
  <div class="col s3">
    <span class="text-bold text-blue">Incendio Edificio:</span>
  </div>
  <div class="col s9">
    <span id="dIncendio_edificio"></span>
  </div>
</div>
<div class="row">
  <div class="col s3">
    <span class="text-bold text-blue">HVCT Edificio:</span>
  </div>
  <div class="col s9">
    <span id="dHvct_edificio"></span>
  </div>
</div>
<div class="row">
  <div class="col s3">
    <span class="text-bold text-blue">Granizo Edificio:</span>
  </div>
  <div class="col s9">
    <span id="dGranizo_edificio"></span>
  </div>
</div>

Answer 1

When you use for (var x in campos_poliza) , x is the index of array, which is 0, 1, 2...

This might be what you need:

for (var x of campos_poliza) {
  if (x[0] == null) {
    x[1].parent().parent().hide();
  }
}

Or

campos_poliza.forEach(x => {
  if (x[0] == null) {
    x[1].parent().parent().hide();
  }
});

Answer 2

Why not toggle if existing

 const obj = [{ incendio_edificio:null, hvct_edificio : "not null", granizo_edificio : null }] Object.entries(obj[0]).forEach(([key,val]) => { const sel = `#d${key.slice(0,1).toUpperCase()}${key.slice(1)}`; console.log(key,val,sel) const $elem = $(sel) if ($elem) $elem.closest(".row").toggle(val!=null) })

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script> <div class="row"> <div class="col s3"> <span class="text-bold text-blue">Incendio Edificio:</span> </div> <div class="col s9"> <span id="dIncendio_edificio"></span> </div> </div> <div class="row"> <div class="col s3"> <span class="text-bold text-blue">HVCT Edificio:</span> </div> <div class="col s9"> <span id="dHvct_edificio"></span> </div> </div> <div class="row"> <div class="col s3"> <span class="text-bold text-blue">Granizo Edificio:</span> </div> <div class="col s9"> <span id="dGranizo_edificio"></span> </div> </div>