Created
July 20, 2012 04:07
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Fun with JS callbacks!
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// getting my head around callbacks, would like to take this further. Maybe another time. | |
// See this code live: http://jsconsole.com/?function%20testMe(%20a%2C%20b%2C%20c%2C%20callback%20)%20%7B%0A%20%20var%20test%20%3D%20a%2C%0A%20%20%20%20%20%20test2%20%3D%20b%2C%0A%20%20%20%20%20%20test3%20%3D%20c%3B%0A%20%20console.log(test%20%2B%20%22%20%22%20%2B%20test2%20%2B%20%22%20%22%20%2B%20test3)%3B%0A%20%20test2%20%3D%20b%20%2B%207%3B%0A%20%20return%20callback(%20test%2C%20test2%2C%20test3%20)%3B%0A%7D%0A%0Afunction%20testThis(%20callback%20)%20%7B%0A%20%20console.log(%22helloworld%22)%3B%0A%20%20console.log(typeof%20callback)%3B%0A%20%20(typeof%20callback%20%3D%3D%3D%20'number'%20%3F%20%20callback%20%3D%20callback%20%2B%207%20%3A%20callback)%3B%0A%20%20return%20callback%3B%0A%7D%0A%0AtestThis(%20testMe(%20%22string%22%2C%2020%2C%20false%2C%20function%20()%20%7B%0A%20%20return%20test2%3B%0A%7D))%3B | |
function testMe( a, b, c, callback ) { | |
var test = a, | |
test2 = b, | |
test3 = c; | |
console.log(test + " " + test2 + " " + test3); | |
test2 = b + 7; | |
return callback( test, test2, test3 ); | |
} | |
function testThis( callback ) { | |
console.log("helloworld"); | |
console.log(typeof callback); | |
(typeof callback === 'number' ? callback = callback + 7 : callback); | |
return callback; | |
} | |
testThis( testMe( "string", 20, false, function () { | |
return test2; | |
})); |
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