Selected posts

Selected questions

C++

• How is the three-way comparison operator different from subtraction?
• Is it possible that a compiled program does not contain an instantiated template class?

C

• Is it well-defined to use a pointer pointing to one-past-malloc?
• strcpy()/strncpy() crashes on structure member with extra space when optimization is turned on on Unix? and a related one:
  • Is it OK to access past the size of a structure via member address, with enough space allocated?
• Why does integer division by -1 (negative one) result in FPE?

General

• Why are loops always compiled into “do…while” style (tail jump)?

Other

• How do antivirus softwares conflict with each other? (Super User)
• What exactly is “UEFI with CSM” boot mode?

Selected Answers

C++

• Append int to std::string
• Ternary operator implicit cast to base class
• Why do user-defined string literals and integer literals have different behavior?
• Is there a valid way to use number values in templates?
• Why does the size of the same identifier differ in C and C++?
• if constexpr (false) always evaluates to true

Python

• python converting strings in list to ints and floats (This is my first Python answer on Stack Overflow!)
• How Python assign multiple variables at one line works?
• What does it mean to say “if n”?

General

• Will printf still have a cost even if I redirect output to /dev/null?
• how to copy lines 10 to 15 of a file into another file, in unix?
• Why can HTTP/HTTPS proxy and Socks proxy work on one single port? (and a related blog article)

Other

• Windows SSH: Permissions for ‘private-key’ are too open (Super User, score 500+)
• Can you go to a website by typing the IP address into the address bar? (In-depth explanation of DNS and HTTP)
• How are Core iX names like Core i5, i7 related to Haswell, Ivy Bridge?
• traceroute shows just * * * in linux (in a virtual machine), although displays all IPs in windows correctly (Networking, Windows)
• Prevent user from installing software
• Can I upgrade my existing Ubuntu installation in WSL from 16.04 to 18.04?
• Why do Android phones have more cores than computers? (Android)
• Why does Android keep APK files of installed apps?
• Can .nomedia be a folder?