Мне было интересно узнать о действиях следующих реализаций условных структур в javascript.
Метод 1:
if(id==="camelCase"){
window.location.href = "http://www.thecamelcase.com";
}else if (id==="jsFiddle"){
window.location.href = "http://jsfiddle.net/";
}else if (id==="cricInfo"){
window.location.href = "http://cricinfo.com/";
}else if (id==="apple"){
window.location.href = "http://apple.com/";
}else if (id==="yahoo"){
window.location.href = "http://yahoo.com/";
}
Метод 2:
switch (id) {
case 'camelCase':
window.location.href = "http://www.thecamelcase.com";
break;
case 'jsFiddle':
window.location.href = "http://www.jsfiddle.net";
break;
case 'cricInfo':
window.location.href = "http://www.cricinfo.com";
break;
case 'apple':
window.location.href = "http://www.apple.com";
break;
case 'yahoo':
window.location.href = "http://www.yahoo.com";
break;
}
Метод 3
var hrefMap = {
camelCase : "http://www.thecamelcase.com",
jsFiddle: "http://www.jsfiddle.net",
cricInfo: "http://www.cricinfo.com",
apple: "http://www.apple.com",
yahoo: "http://www.yahoo.com"
};
window.location.href = hrefMap[id];
Метод 4
window.location.href = {
camelCase : "http://www.thecamelcase.com",
jsFiddle: "http://www.jsfiddle.net",
cricInfo: "http://www.cricinfo.com",
apple: "http://www.apple.com",
yahoo: "http://www.yahoo.com"
}[id];
Вероятно, метод 3 и 4 может иметь почти такую же производительность, но только сообщение для подтверждения.