| Autor | Zpráva | ||
|---|---|---|---|
| robbie Profil * |
#1 · Zasláno: 13. 1. 2016, 14:50:46
Zdravím, chtěl jsem poprosit o radu, nechápu, proč mi nefunguje v prohlížeči tento kod:
Dekuji za pomoc. R. <!doctype html>
<html>
<head>
<title>Chapter 8 Exercise 4</title>
<script type="text/javascript">
function Star(constell,type,specclass,magnitude) {
this.constellation = constell;
this.type = type;
this.spectralClass = specclass;
this.mag = magnitude;
}
star["Polaris"] = new Star("Ursa Minor","Double/Cepheid","F7",2.0);
star["Mizar"] = new Star("Ursa Major","Spectroscopic Binary","A1 V",2.3);
star["Aldebaran"] = new Star("Taurus","Irregular Variable","K5 III",0.85);
star["Rigel"] = new Star("Orion","Supergiant with Companion","B8 Ia",0.12);
star["Castor"] = new Star("Gemini","Multiple/Spectroscopic","A1 V",1.58);
star["Albireo"] = new Star("Cygnus","Double","K3 II",3.1);
star["Acrux"] = new Star("Crux","Double","B1 IV",0.8);
star["Gemma"] = new Star("Corona Borealis","Eclipsing Binary","A0 V",2.23);
star["Procyon"] = new Star("Canis Minor","Double","F5 IV",0.38);
star["Sirius"] = new Star("Canis Major","Double","A1 V",-1.46);
star["Rigil Kentaurus"] = new Star("Centaurus","Double","G2 V",-0.01);
star["Deneb"] = new Star("Cygnus","Supergiant","A2 Ia",1.25);
star["Vega"] = new Star("Lyra","White Dwarf","A0 V",0.03);
star["Altair"] = new Star("Aquila","White Dwarf","A7 V",0.77);
if ("Polaris" in star) {
star["Polaris"].aka = "The North Star";
alert("Polaris found and is also known as " + star["Polaris"].aka);
}
for (var element in star) {
if ("aka" in star[element]) {
alert(element + " is in " + star[element].constellation);
}
}
</script>
<body>
</body>
</html> |
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| Chamurappi Profil |
#2 · Zasláno: 13. 1. 2016, 15:01:03
Reaguji na robbieho:
Proměnná star neexistuje, takže do star["Polaris"] těžko můžeš něco přiřadit.
Chyba se vůbec netýká operátoru in. Nebo jsi neuvedl kompletní kód.
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| robbie Profil * |
#3 · Zasláno: 13. 1. 2016, 15:27:52
Chamurappi:
Dekuju moc, čerpám z jedné anglické knihy-učebnice a tam to nemeli, tak me zajimalo, kde je problém. Jeste jednou dekuju. R. |
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| KryVosa Profil |
#4 · Zasláno: 13. 1. 2016, 20:27:42
Vyřešit jde jednoduše, na začátek scriptu přidáš
var star=[];.
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| Radek9 Profil |
#5 · Zasláno: 13. 1. 2016, 21:08:02
KryVosa:
Proč pole? |
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Časová prodleva: 9 let
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