join

优质

小牛编辑

136浏览

2023-12-01

Creates a string from joining together all of the elements in this sequence, separated by the given delimiter.

Signature

Sequence.join = function(delimiter) { /*...*/ }

Sequence.join = function join(delimiter) {
  delimiter = typeof delimiter === "undefined" ? "," : String(delimiter);

  var i = -1;
  return this.reduce(function(str, e) {
if (++i > 0) {
  str += delimiter;
}
return str + e;
  }, "");
}

Name	Type(s)	Description
delimiter	string?	The separator to insert between every element from this sequence in the resulting string (defaults to `","`).
returns	string	The delimited string.

Examples

function toParam(v, k) {
  return k + '=' + v;
}

Lazy([6, 29, 1984]).join("/")  // => "6/29/1984"
Lazy(["a", "b", "c"]).join()   // => "a,b,c"
Lazy(["a", "b", "c"]).join("") // => "abc"
Lazy([1, 2, 3]).join()         // => "1,2,3"
Lazy([1, 2, 3]).join("")       // => "123"
Lazy(["", "", ""]).join(",")   // => ",,"
Lazy([1, 2]).join(0)           // => "102"
Lazy(["cons", "d"]).join(true) // => "construed"
Lazy({foo: 1, bar: 2}).values().join()        // "1,2"
Lazy({foo: 1, bar: 2}).keys().join()          // "foo,bar"
Lazy({foo: 1, bar: 2}).map(toParam).join('&') // 'foo=1&bar=2'