query: javascript : || double pipe operator alternative that tests undefined only
positive_passages.docid: 2772
positive_passages.text: Is there a "null coalescing" operator in JavaScript?
negative_passages.docid: 49446
negative_passages.text: How to check for an undefined or null variable in JavaScript?
negative_passages.docid: 31447
negative_passages.text: How would you overload the [] operator in javascript
negative_passages.docid: 5861
negative_passages.text: How can I test properties of a symbol from the string name without the symbol completely evaluating
negative_passages.docid: 21183
negative_passages.text: Splitting a Java String by the pipe symbol using split("|")
negative_passages.docid: 131495
negative_passages.text: What does ‘::’ (double colon) do in javascript for events?
negative_passages.docid: 84421
negative_passages.text: variable === undefined vs. typeof variable === "undefined"
negative_passages.docid: 285
negative_passages.text: When is JavaScript's eval() not evil?
negative_passages.docid: 83501
negative_passages.text: What is the JavaScript >>> operator used for?
negative_passages.docid: 118243
negative_passages.text: How do you test to see if a double is equal to NaN?
negative_passages.docid: 104032
negative_passages.text: Strange JavaScript idiom - what does "/xyz/.test(function(){xyz;})" do?
negative_passages.docid: 115437
negative_passages.text: Javascript || operator
negative_passages.docid: 78396
negative_passages.text: Logical Operators, || or OR?
negative_passages.docid: 5377
negative_passages.text: Is there a standard function to check for null, undefined, or blank variables in JavaScript?
negative_passages.docid: 49816
negative_passages.text: Javascript: operator overloading
negative_passages.docid: 601
negative_passages.text: How do I test for an empty JavaScript object?
negative_passages.docid: 128110
negative_passages.text: Change Operator Precedence of --> operator