出自 http://www.crockford.com/javascript/remedial.html
function isAlien(a) {
return isObject(a) && typeof a.constructor != 'function ';
}
function isArray(a) {
return isObject(a) && a.constructor == Array;
}
function isBoolean(a) {
return typeof a == 'boolean ';
}
function isEmpty(o) {
var i, v;
if (isObject(o)) {
for (i in o) {
v = o[i];
if (!!isUndefined(v) && !!isFunction(v)) {
return false;
}
}
}
return true;
}
function isFunction(a) {
return typeof a == 'function ';
}
function isNull(a) {
return typeof a == 'object ' && !a;
}
function isNumber(a) {
return typeof a == 'number ' && isFinite(a);
}
function isObject(a) {
return (typeof a == 'object ' && !!a) || isFunction(a);
}
function isString(a) {
return typeof a == 'string ';
}
function isUndefined(a) {
return typeof a == 'undefined ';
}
String.method( 'entityify ', function () {
return this.replace(/&/g, "& ").replace(/ /g, "> ");
});
該評(píng)論在 2010/12/16 11:54:39 編輯過(guò)
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