Peter Seliger questions

Peter Seliger answers

• How to extract text from between any given pair of spans?
• How to use common try-catch for processing every given function in Javascript?
• How to merge objects with the same properties into an Array?
• Good Practice: How can I ensure a JavaScript constructor has access to mixin functions?
• How to check if a variable is undefined versus it is undeclared in javascript?
• How to rename object keys inside array
• How to observe property value changes of a third party object?