is.js

December 11, 2009

is = function(_) { return(
_ !== null && typeof(_) != "undefined"
)}

is.nt = function(_) { return(
!is(_)
)}

$.each(is, function(i) {

is.nt[i] = function(_) { return(
!is[i](_)
)}

})

is.bool = function(_) { return(
typeof(_) == "boolean"
)}

is.num = function(_) { return(
typeof(_) == "number"
)}

is.str = function(_) { return(
typeof(_) == "string"
)}

is.re = function(_) { return(
_ !== null && typeof(_) == "object" && is(_.test)
)}

is.singular = function(_) { return(
is.bool(_) || is.num(_) || is.str(_) || is.re(_)
)}

is.args = function(_) { return(
_ !== null && typeof(_) == "object" && is.nt(_.join)
)}

is.arr = function(_) { return(
_ !== null && typeof(_) == "object" && is(_.join)
)}

is.obj = function(_) { return(
_ !== null && typeof(_) == "object" && !(is(_.length) || is(_.test))
)}

is.fun = function(_) { return(
typeof(_) == "function" && is.nt(_.test)
)}

is.plural = function(_) { return(
is.arr(_) || is.args(_) || is.obj(_) || is.fun(_)
)}

is.event = function(_) { return(
is.nt(_) || is(_.which || _.keyCode)
)}

$.each({
bs:    8,
tab:   9,
enter: 13,
esc:   27,
space: 32,
left: 37,
up:    38,
right: 39,
down: 40
}, function(i, it) {

$.is[i] = function(e) {
return($.num(e) == it)
}

})

$.each([
"alt",
"ctrl",
"meta",
"shift"
], function(i, it) {

is[it] = function(e) {
return(e[it+"Key"])
}

})

is.of = function(_) {

var types = [
    "nt",
    "num",
"bool",
"str",
"re",
    "arr",
    "obj",
    "fun",
    "event"
]

var acc = []

$.each(types, function(i, type) {
if ($.is[type](_)) acc.push(_)
})

return(acc)

}