myblog/node_modules/less/test/less-bom/functions-each.less

@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;
  // skip comments
  two: green;
  /** and these
  */
  three: red; //and this
}
.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);
  });
}

@columns: range(4);
.column-list {
  list: @columns;
}

each(@columns, .(@val) {
  .col-@{val} {
    width: (100% / length(@columns));
  }
});

each(range(10px, 30px, 10px), .(@val, @index) {
  .row-@{index} {
    width: @val;
  }
});

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

// https://github.com/less/less.js/issues/3325

@color-schemes: {
  @primary: {
    @color: blue;
  }
  @secondary: {
    @color: red;
  }
}
.test {
  each(primary secondary, .(@color-name) {
    @scheme: @color-schemes[@@color-name]; // e.g. @color-name = primary
    color: @scheme[@color];
  });
}

@one: {
  @two: {
    foo: red;
    bar: blue;
  };
};

each(@one[@two], {
  .@{key} {
    content: @value;
  }
});