variables 502

  1. How do JavaScript closures work?
  2. What is the scope of variables in JavaScript?
  3. How to determine if variable is 'undefined' or 'null'?
  4. How do you check if a variable is an array in JavaScript?
  5. JavaScript check if variable exists (is defined/initialized)

  6. How to check if a variable is set in Bash?
  7. PHP: “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset”
  8. How to check a not-defined variable in JavaScript
  9. How to trim whitespace from a Bash variable?
  10. Static variables in JavaScript
  11. How do I check if a variable exists?
  12. What is the naming convention in Python for variable and function names?
  13. How to check if type of a variable is string?
  14. MySQL: @variable vs. variable. What's the difference?
  15. Is there a better way of writing v = (v == 0 ? 1 : 0);
  16. Capturing multiple line output into a Bash variable
  17. What is the purpose of the single underscore “_” variable in Python?
  18. Define global variable in a JavaScript function
  19. How to add elements to an empty array in PHP?
  20. Static vs class functions/variables in Swift classes?
  21. Difference between declaring variables before or in loop?
  22. Determine if variable is defined in Python
  23. Semantic Issue: Property's synthesized getter follows Cocoa naming convention for returning 'owned' objects
  24. How to check if element exists in the visible DOM?
  25. Length of string in bash
  26. Declaring Multiple Variables in JavaScript
  27. Is there any way I can define a variable in LaTeX?
  28. JavaScript OR (||) variable assignment explanation
  29. Printing all global variables/local variables?
  30. Is it possible to print a variable's type in standard C++?
  31. How to use a variable for a key in a JavaScript object literal?
  32. Check if object exists in JavaScript
  33. Append integer to beginning of list in Python
  34. Create timestamp variable in bash script
  35. Pointer vs. Reference
  36. Expansion of variable inside single quotes in a command in Bash
  37. Set environment variables from file
  38. Pass Variables by Reference in Javascript
  39. Test if number is odd or even
  40. Will using 'var' affect performance?
  41. Non-static variable cannot be referenced from a static context
  42. Java system properties and environment variables
  43. @ variables in Ruby on Rails
  44. Convert string to variable name in JavaScript
  45. const vs constexpr on variables
  46. Why are variables “i” and “j” used for counters?
  47. Is it better in C++ to pass by value or pass by constant reference?
  48. How to get a variable name as a string?
  49. Best way to test for a variable's existence in PHP; isset() is clearly broken
  50. Python variable scope error