Prevent stop of code execution on undefined value
21050
Test for existence of nested JavaScript object key
10333
How do I best silence a warning about unused variables?
83782
How to check a not-defined variable in JavaScript
144673
Why does this JavaScript code print "undefined" on the console?
66916
Expressions containing globally undefined symbols inside a function where they are defined
85118
What happens with event handlers when an object goes out of scope?
42442
Chrome/Firefox console.log always appends a line saying 'undefined'
118013
How to defer inline Javascript?
119268
Stopping the debugger when a NaN floating point number is produced
10345
setTimeout in loop to check for a change in bounds
1106
Defer loading of JavaScript - Uncaught ReferenceError: $ is not defined
7276
Code executes condition wrong?
156123
How to detect when a variable changes value
153893
What are the circumstances under which a finally {} block will NOT execute?
130401
Is it possible to skip parameters that have default values in a php(5) function call?
3175
Can you 'exit' a loop in PHP?
105287
(Why) is using an uninitialized variable undefined behavior?