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JavaScript isset test function
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function isset(v){ | |
if(typeof v === 'undefined'){ | |
return false; | |
} else if( typeof v === 'object' && v === null || typeof v === 'object' && Object.keys(v).length === 0){ | |
return false; | |
} else if( v instanceof Array && v.length === 0){ | |
return false; | |
} else if (typeof v === 'number' && isNaN(v) ){ | |
return false; | |
} | |
return true; | |
} | |
// ########### isset function TESTS | |
// var ttest; | |
// var ttestN = null; | |
// var ttestNa = NaN; | |
// var ttestU = undefined; | |
// var ttestA = new Array(); | |
// var ttestO = new Object(); | |
// if(isset(ttest)) { | |
// console.log('[true] ttest: '); | |
// } else { | |
// console.log('[false] ttest: '); | |
// } | |
// if(isset(ttestA)) { | |
// console.log('[true] ttestA: '); | |
// } else { | |
// console.log('[false] ttestA: '); | |
// } | |
// if(isset_2(ttestA[0])) { | |
// console.log('[true] ttestA[0]: '); | |
// } else { | |
// console.log('[false] ttestA[0]: '); | |
// } | |
// if(isset_2(ttestA[1])) { | |
// console.log('[true] ttestA[1]: '); | |
// } else { | |
// console.log('[false] ttestA[1]: '); | |
// } | |
// if(isset(ttestO)) { | |
// console.log('[true] ttestO: '); | |
// } else { | |
// console.log('[false] ttestO: '); | |
// } | |
// if(isset(ttestO.one)) { | |
// console.log('[true] ttestO.one: '); | |
// } else { | |
// console.log('[false] ttestO.one: '); | |
// } | |
// if(isset(ttestN)) { | |
// console.log('[true] ttestN: '); | |
// } else { | |
// console.log('[false] ttestN: '); | |
// } | |
// if(isset(ttestNa)) { | |
// console.log('[true] ttestNa: '); | |
// } else { | |
// console.log('[false] ttestNa: '); | |
// } | |
// if(isset(ttestU)) { | |
// console.log('[true] ttestU: '); | |
// } else { | |
// console.log('[false] ttestU: '); | |
// } |
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