©2024 by josuttis.com 1 C++ Nicolai M. Josuttis josuttis.com @NicoJosuttis Taming the C++ Filter View September 17, 2024 16:45 - 17:45 MDT ©2024 by josuttis.com 2 C++ Nicolai M. Josuttis • Independent Other Topics: – Systems Architect – Technical Manager – SOA – X and OSF/Motif Nico Josuttis C++ Filter View @cppcon 2024-09-17 1©2024 by josuttis.com 3 C++ Views C++20 ©2024 by josuttis.com 4 C++ print(coll2); Output: 0 8 15 47 11 42 1 0 1 8 11 15 42 47 C++20 template Nico Josuttis C++ Filter View @cppcon 2024-09-17 2©2024 by josuttis.com 5 C++ C++20: Views void print(const auto& coll)

...................................................................................... 2739 F.5. bloom ................................................................................................. Methods ............................................................................ 347 9.49. jsonpath Filter Expression Elements ....................................................................... 349 9 Operator Classes ....................................... 2548 68.4. Procedure and Support Numbers for Bloom Operator Classes ......................................... 2549 68.5. Procedure and Support Numbers

...................................................................................... 2595 F.5. bloom .............................................................................................. 2598 Methods ...................................................................... 329 9.49. jsonpath Filter Expression Elements .................................................................. 331 9.50. Inclusion Operator Classes ................................. 2410 68.4. Procedure and Support Numbers for Bloom Operator Classes ................................... 2411 68.5. Procedure and Support Numbers for

basic_archive — an example WAL archive module ....................................... 2862 F.6. bloom — bloom filter index access method .................................................. 2863 F.7. btree_gin Methods ............................................................................ 366 9.51. jsonpath Filter Expression Elements ....................................................................... 369 9 Operator Classes ....................................... 2719 64.7. Procedure and Support Numbers for Bloom Operator Classes ......................................... 2720 64.8. Procedure and Support Numbers

basic_archive — an example WAL archive module ....................................... 2807 F.7. bloom — bloom filter index access method .................................................. 2808 F.8. btree_gin Methods ............................................................................ 357 9.51. jsonpath Filter Expression Elements ....................................................................... 359 9 Operator Classes ....................................... 2648 71.4. Procedure and Support Numbers for Bloom Operator Classes ......................................... 2649 71.5. Procedure and Support Numbers

basic_archive — an example WAL archive module .................................. 2706 F.6. bloom — bloom filter index access method ............................................ 2707 F.7. btree_gin — GIN Methods ...................................................................... 345 9.51. jsonpath Filter Expression Elements .................................................................. 349 9.52. Inclusion Operator Classes ................................. 2568 64.7. Procedure and Support Numbers for Bloom Operator Classes ................................... 2569 64.8. Procedure and Support Numbers for

basic_archive — an example WAL archive module .................................. 2664 F.7. bloom — bloom filter index access method ............................................ 2665 F.8. btree_gin — GIN Methods ...................................................................... 337 9.51. jsonpath Filter Expression Elements .................................................................. 339 9.52. Inclusion Operator Classes ................................. 2510 71.4. Procedure and Support Numbers for Bloom Operator Classes ................................... 2511 xxix PostgreSQL 16.1 Documentation 71

...................................................................................... 2779 F.7. bloom ................................................................................................. Methods ............................................................................ 352 9.50. jsonpath Filter Expression Elements ....................................................................... 354 9 Operator Classes ....................................... 2607 71.4. Procedure and Support Numbers for Bloom Operator Classes ......................................... 2608 71.5. Procedure and Support Numbers

basic_archive ..................................................................................... 2632 F.7. bloom .............................................................................................. 2633 Methods ...................................................................... 334 9.50. jsonpath Filter Expression Elements .................................................................. 336 9.51. Inclusion Operator Classes ................................. 2466 71.4. Procedure and Support Numbers for Bloom Operator Classes ................................... 2467 71.5. Procedure and Support Numbers for

Selecting multiple records Filtering records Sorting records Getting random records Paginating records Counting records Aggregating records Retrieving Scalar Values Window functions Retrieving row tuples / dictionaries person.birthday) # prints: # Bob 1960-01-15 # Herb 1950-05-05 # Grandma L. 1935-03-01 Combining filter expressions Peewee supports arbitrarily-nested expressions. Let’s get all the people whose birthday for (content, username) in cursor: print(username, '->', content) Filtering records You can filter for particular records using normal python operators. Peewee supports a wide variety of query operators