Wordpressメモとかアフィめもとか

select @i:=@i+1 as rownum,COLUM from (select @i:=0) as dummy,TABLENAME;

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<p class="p_a" id="1">p-1</p>
<p class="p_a" id="2">p-2</p>
<p class="p_a" id="3">p-2</p>
<p class="p_b" id="4">p-4</p>
<p class="p_b" id="5">p-5</p>
<p class="p_b" id="6">p-6</p>

$(function() {
  $(".p_a,#5").css("backgroundColor", "red");
});

$(function() {
  $(".p_b" + "#6").css("backgroundColor", "red");
});

セレクタ1, セレクタ2

セレクタ1 + セレクタ2

$(function() {
  $(".p_a" + "#2" + "," + ".p_b" + "#5, #6").css("backgroundColor", "red");
});

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date_i18n

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