Shortest conditional statement
/* Short hand conditional This is similar to Optional constructor arguments utilising right hand evaluation if left hand results in boolean true */ var foo = 2, bar; foo == 2 && (bar = 3); /* Can also be used to call functions conditonally */ foo == 2 && baz();
Object properties to Array
/*
Collecting object properties into
an Array
*/
var i = 0, arr = [];
var foo = {bar: "value bar", baz: "value baz"};
for(arr[i++] in foo)
/*
Result:
arr == ["bar", "baz"]
*/
Optional constructor arguments
/*
Setting object parameters
optionally in the constructor
bar is required, baz is optional
Note:
false or 0 will result in no value being
used. Better to use conditions in this case.
*/
function foo(bar, baz) {
this.bar = bar;
baz && (this.baz = baz);
}
foo.prototype = {
bar: "",
baz: ""
};
Function arguments with defaults
/*
Function with defaulted arguments
bar is required, baz is optional with a default
Note:
false or 0 will result in the default value being
used. Better to use conditions in this case.
*/
function foo(bar, baz) {
baz = baz || 'default value';
}
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