检查一个数组元素是否包含字符串

Question

Is it possible to search for a string within each element of an array.

So if I have

var arr =["select 1", "select 2", "unselect 1"];

I want to see which array elements have "1" in them then remove the ones that dont. This is the code I have but it is not working.

var RowNum = ( $('table.input-table > tbody > tr').length);
var type = [];
for(var i=0; i<=(RowNum - 1); i++){
    type.push( $("table.input-table > tbody > tr").eq(i).html());
};
alert(type.length);

for(var i = (type.length - 1); i >= 0 ; i--){
    var SpliceVal = 0;

    for(var ii = 0; ii <= (Req.length -1); ii++){
        if(type[i].indexof(Req[ii]) == -1){
            SpliceVal += 1;    
        };  
    };

    if(SpliceVal == Req.length){
        type.splice(i, 1);
    };
};
alert(type.length);

The first alert(type.length); returns a 7. Req.length = 3

The second alert(type.length); should return a 3

The code will partially run until I get to the line:

if(type[i].indexof(Req[ii]) == -1)

I get an error saying TypeError: type[i].indexof is not a function

Any help is appreciated

Answer 1

I would use filter;

var containsOne = function(el) {

   return el.indexOf('1') !== -1;
}

var filtered = ['select', 'select', 'select1'].filter( containsOne );

//returns 'select1'

http://jsfiddle.net/8vmjb1Lt/

Answer 2

If you are dead set on using splice instead of another method:

var arr =["select 1", "select 2", "unselect 1", "uneselect 2", "select 1"];

for (var i = 0; i < arr.length; i++) {
    if (arr[i].indexOf("1") > -1) {
        arr.splice(i, 1);
        if (i !== 0) {i--;}
    }
}

Updated JSFIddle .

This will modify the original array

Answer 3

Here's the exact thing you need. Use jquery grep() function by which you can get the list of elements that satisfy the your condition as shown below:

// Original array
var arr =["select 1", "select 2", "unselect 1"];

// Here, after executing this function your original array will have only
// elements having 1 in them
arr = jQuery.grep(arr, function(value) {
           if(value.indexOf("1") > 0){
              return true;
           }else{
              return false;
           }
      });