从数组中的元素修改空白元素

Question

I have the following array of arrays:

arr1= ["avd befe, bla, bla, bla, bla", "cveve devev, bla, bla, bla, bla", "aava beve. cavbr, bla, bla, bla, bla", "feve gyhyh, bla, bla, bla, bla", "ibtbt, bla, bla, bla, bla"] 

In my example, I am focused on the first group of characters in the array. These can include items that are of the format "x", "xy" (wa blank space between two groups of characters), and "xyz" (w two blank spaces between three groups of characters.

I would like to delete the y from the third group of elements (so that "xyz" becomes "xz"). arr1 shown above is an example - the array I'm working with has a couple hundred entries. In that example above, I'd want "aava beve. cavbr" to become "aava cavbr" in the third element in arr1.

Answer 1

I'm making assumptions, based on your question, that these will always and only be in the first place in the nested arrays.

// loop over the inner arrays
arr1.forEach(function(innerArr) {
  var parts = innerArr[0].split(' ');
  innerArr[0] = parts[0] + ' ' + parts[ parts.length - 1 ];
});

If those elements never have additional spaces in them (eg it's always "xyz" and not "xy some other stuff with spaces in it z" then you can just do innerArr[0].replace(/\\s[^ ]\\s/, ''); but I wasn't clear on the exact form of your data.

EDIT:

Based on the new data format, here's more what you're after.

var newArr = arr1.map(function(val) {
  var parts = val.split(',');
  var words = parts[0].split(' ');
  if (words.length > 2) {
    parts[0] = words[0] + ' ' + words[ words.length - 1 ];
  }
  return parts.join(',');
});

Answer 2

if i understand you question correctly , maybe code like this :

arr1.map(function(ele){
    var current = ele[0].split(' ');
    var head = current.shift();      // head is first group
    var tail = current.pop();        // tail is last  group
    // console.log(head.concat([' '],tail));
    return head.concat([' '],tail);
});

Answer 3

It looks to me like you want to get the first and last values and keep them separated by a whitespace character. Here's the easiest way I can think to do that:

var arr1 = ["avd befe, bla, bla, bla, bla", "cveve devev, bla, bla, bla, bla", "aava beve. cavbr, bla, bla, bla, bla", "feve gyhyh, bla, bla, bla, bla", "ibtbt, bla, bla, bla, bla"]

function clean(str) {
  var foo = str.split(",")[0];
  var bar = foo.substr(0, foo.indexOf(" ")) + foo.substr(foo.lastIndexOf(" "));
  return str.replace(foo, bar);
}
for (var i = 0; i < arr1.length; i++) {
    arr1[i] = clean(arr1[i]);
}