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// See comments below.
// This code sample and justification brought to you by
// Isaac Z. Schlueter, aka isaacs
// standard style
var a = "ape",
b = "bat",
c = "cat",
d = "dog",
e = "elf",
f = "fly",
g = "gnu",
h = "hat",
i = "ibu";
// comma-first style
var a = "ape"
, b = "bat"
, c = "cat"
, d = "dog"
, e = "elf"
, f = "fly"
, g = "gnu"
, h = "hat"
, i = "ibu"
;
// error in standard style
var a = "ape",
b = "bat",
c = "cat",
d = "dog"
e = "elf",
f = "fly",
g = "gnu",
h = "hat",
i = "ibu";
// error in comma-first style
var a = "ape"
, b = "bat"
, c = "cat"
, d = "dog"
e = "elf"
, f = "fly"
, g = "gnu"
, h = "hat"
, i = "ibu"
;
// Objects:
// JSON.stringify style
var o = {
a : "ape",
b : "bat",
c : "cat",
d : "dog",
e : "elf",
f : "fly",
g : "gnu",
h : "hat",
i : "ibu"
},
a = [
[ "ape", "bat" ],
[ "cat", "dog" ],
[ "elf", "fly" ],
[ "gnu", "hat" ],
[ "ibu" ]
];
// comma-first
var o =
{ a : "ape"
, b : "bat"
, c : "cat"
, d : "dog"
, e : "elf"
, f : "fly"
, g : "gnu"
, h : "hat"
, i : "ibu"
}
, a =
[ [ "ape", "bat" ]
, [ "cat", "dog" ]
, [ "elf", "fly" ]
, [ "gnu", "hat" ]
, [ "ibu" ]
];
// errors in objects:
// JSON.stringify style
var o = {
a : "ape",
b : "bat",
c : "cat",
d : "dog"
e : "elf",
f : "fly",
g : "gnu",
h : "hat",
i : "ibu"
},
a = [
[ "ape", "bat" ],
[ "cat", "dog" ],
[ "elf", "fly" ]
[ "gnu", "hat" ],
[ "ibu" ]
];
// comma-first
var o =
{ a : "ape"
, b : "bat"
, c : "cat"
, d : "dog"
e : "elf"
, f : "fly"
, g : "gnu"
, h : "hat"
, i : "ibu"
}
, a =
[ [ "ape", "bat" ]
, [ "cat", "dog" ]
, [ "elf", "fly" ]
[ "gnu", "hat" ]
, [ "ibu" ]
];
// Addendum: effects on the return statement.
// It does not break.
return [ 1
, 2
, 3
] // returns [1,2,3]
return { a : "ape"
, b : "bat"
} // returns {a:"ape",b:"bat"}
// even just separating two values by commas is fine,
// though a bit silly
return 1
, 2
, 3
, 4 // returns the last value, 4
// this, however is wrong:
return
1
, 2 // returns undefined, because of semicolon-insertion.
// so is this. otb == fail.
return
{ a : "ape"
, b : "bat"
} // returns undefined,
// then creates a block with two named statements.
// this is ok:
return ( 1
, 2
) // returns 2
// so is this:
return (
{ a : "ape"
, b : "bat"
}
) // returns {a:"ape",b:"bat"}
// Addendum 2: A function call
doSomething( aPrettyLongVariableName
, "A string, which has some useful information"
, "If you put these all together, it'd be too long"
, { a: "is for antelope", b: "is for bat" }
, 42
)
// Addendum 3: More realistic error in standard style:
// leaks FIVE globals!
var a = "ape eat banana",
b = "bat, allowed to fly",
c = "cat toy",
d = "dog chasing the mailman,"
e = "elf lord",
f = "fly through the air",
g = "gnu is not unix",
h = "hat goes on your head",
i = "ibu isn't a cow";
// Error: Can't call method 'forEach' of undefined.
// not passing in undefined as an argument!??
mergeLists([ apple, [ penelope, granger ] ],
[ fun ],
[ 1, 2, 3, 4, 5, 6, 7, 8 ]
[ "mary's store has many pies, and cookies, and eggs," ]
[ function() { doSomething() } ]);
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