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Promise.allSettled(): report for each completed task
Promise.allSettled() waits for every input promise to settle, whether fulfilled or rejected.
Published22 Oct 2026
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Python csv: a comma inside a field is not a separator
The csv module reads tabular rows using rules for delimiters and quoting. A field such as "Sofia, Bulgaria" can remain one cell instead of being split into two.
Published22 Oct 2026
Technology
Python json: decoded data is not necessarily a dictionary
json.loads() converts JSON text into the corresponding Python value. For example, json.loads('[1, 2]') produces a list, while json.loads('3') produces an integer. Successful decoding do...
Published22 Oct 2026
Technology
Python re: matching the whole input or finding a fragment
re.fullmatch() requires a pattern to cover the entire string. For example, re.fullmatch(r'[0-9]{4}', '1234') matches, but the same check against '1234x' does not.
Published22 Oct 2026
Technology
QR codes: data, the quiet zone and error correction
QR code is a two-dimensional data symbol. Its successful reading depends on both the content and the size of the modules, the free space, and the correction level selected.
Published22 Oct 2026
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Queue: passing work between threads
queue.Queue provides a synchronized queue for producers and consumers. maxsize can bound pending work instead of accepting input without a limit.
Published22 Oct 2026
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Quotes: typographic quotation marks use defined pairs
quotes sets the quotation-mark pairs used for automatically generated opening and closing marks. It can also distinguish nesting levels.
Published23 Oct 2026
Technology
Random: reproducible experiments without secrecy
random.Random(42) creates a separate pseudorandom generator with a specified initial state. It suits reproducible simulations and examples without necessarily changing the shared genera...
Published22 Oct 2026
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reduce(): the sum starts from a clear starting value
reduce() passes an accumulated result from one array element to the next.
Published22 Oct 2026
Technology
Reflog: where a local reference previously pointed
git reflog records local reference movements, including HEAD. It can help locate a commit after reorganizing work or moving a branch.
Published22 Oct 2026
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RegExp.test(): why rechecking may be different
Expressions with g or y keep a position on the last match.
Published22 Oct 2026
Technology
repeat(): repetition of text with a controlled number
The output string remains unchanged.
Published22 Oct 2026