Results for “GROUP BY”
Small, practical examples. Search by task or narrow things down below.
Index records by a unique key
Java: Use toMap with an explicit merge rule so duplicate keys have defined behavior.
Java✓ Tested
Initialize a byte buffer to zero
C: memset initializes each byte to the chosen unsigned-char value.
C✓ Tested
Initialize structure fields by name
C: Designated initializers make field assignments independent of their declaration order.
C✓ Tested
Inspect a byte as hexadecimal
Arduino / C: Inspect a byte as hexadecimal on an Uno with the Serial Monitor set to 9600 baud.
Arduino / C✓ Tested
Inspect a byte without consuming it
Arduino / C: peek leaves the next byte available for a later read.
Arduino / C✓ Tested
Inspect bytes as hexadecimal values
Linux Commands: Use od with explicit formatting and no address column.
Linux Commands✓ Tested
Join lines from two files side by side
Linux Commands: Use paste to pair lines by position with a chosen separator.
Linux Commands✓ Tested
Join two sorted files by a shared key
Linux Commands: Use join for sorted, simple delimiter-separated records with one row per key.
Linux Commands✓ Tested
Keep caller data unchanged by passing a structure by value
C: A value parameter is a copy of the original structure.
C✓ Tested
Keep loop state by avoiding a pipeline subshell
Bash Scripts: Redirect input into a while loop so updates to a counter remain in the current shell.
Bash Scripts✓ Tested
Limit the bytes read from a stream
Limit the bytes read from a stream using a complete Go program with explicit sample inputs.
Go✓ Tested
List files by extension
Enumerate regular files and return their names in order.
Get-ChildItem✓ Tested