@selectors: blue, green, red;
@list: a b c d;

each(@selectors, {
  .sel-@{value} {
    a: b;
  }
});

.each {
  each(@list, {
    index+: @index;
    item@{index}: @value;
  });

  // nested each
  each(10px 15px, 20px 25px; { 
    // demonstrates nesting of each()
    each(@value; #(@v, @k, @i) {
      nest-@{i}-@{index}: @v @k;
    });
  });

  // nested anonymous mixin
  .nest-anon {
    each(a b, .(@v;@i) {
      each(c d, .(@vv;@ii) {
        nest-@{i}-@{ii}: @v @vv;
      });
    });
  }

  // vector math
  each(1 2 3 4, {
    padding+_: (@value * 10px);
  });
}

@set: {
  one: blue;
  two: green;
  three: red;
}
.set {
  each(@set, {
    @{key}: @value;
  });
}
.set-2() {
  one: blue;
  two: green;
  three: red;
}
.set-2 {
  each(.set-2(), .(@v, @k, @i) {
    @{k}-@{i}: @v;
  });
}

.pick(@a) when (@a = 4) {
  val3: @a;
}
.single {
  each(true, {
    val: @value;
  });
  @exp: 1 + 1;
  each(@exp, {
    val2: @value;
  });
  each(1 2 3 4, {
    .pick(@value);
  });
}

@list: a b c d;
.box {
  each(@list, {
    -less-log: extract(@list, @index);
  })
}