$([selector][, context])

$("div").each(function(element, index) {
    //any process
});

var clickCallback = function(e) {
    console.log(e);
};
$("#id").bind("click", clickCallback);
//bind event to element

var clickCallback = function(e) {
    console.log(e);
};
$(".class").unbind("click", clickCallback);
//unbind event from element

var touchstartCallback = function(e) {
    console.log(e);
}
$("#parentId").delegate("touchstart", ".childClass", touchstartCallback);
//start to delegate event
//elements will be searched by selector and fired 
//in context which Fluent object contains

var touchendCallback = function(e) {
    console.log(e);
};
$(".parentClass").undelegate("touchend", ".childClass", touchendCallback);
//end to delegate event

var filtered = $("article").filter(function() {
    return element.classList.contains("hoge");
});
//filter elements with callback function

var mapped = $("section").map(function(element) {
    return element.classList.add("hoge")
});
//execute callback to elements,
//and return affected elements as Fluent object

var foundElements = $("body").find(".className");

$(".className").html("<div>12345</div>");
//set value to innerHTML property

$("li").text("setText");
//set value to textContent property

$("input").val("value");
//set value to value property

$("img").attr("src", "http://.../hoge.png");
//set value to attribute

$("span").data("tmp", "keepvalue");
//set value to dataset

$("div").css("color", "red");
//set value to key of style structure

$(".testClass").addClass("addClass");
//add class to elements

$(".testClass").removeClass("removeClass");
//remove class from elements

$(".testClass").toggleClass("toggleClass");
//toggle class of elements

$("#container").append(elements);
//append element

$("#container").prepend(elements);
//insert element

$(".testClass").show();
//show elements

$(".testClass").hide();
//hide elements