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Graph/double-rounding-formatting-tie-break

AntiPattern

Double-Rounding Print Tie

double-rounding-formatting-tie-break

Floating-point values get formatted into decimals using a tie-breaking rule that depends on double rounding, so seemingly equivalent literals (or near-boundary decimals) can land on different printed precisions, confusing comparisons and downstream parsing.

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Public graph metadata

Updated5/4/2026

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30 linked nodes

MATCHESSolution

Avoid validating the input as a numeric type directly; validate it as a string with a regex (e.g., `z.string().regex(/^[1-9]\d*$/)`) and then convert it to a number in `onSubmit` (or when mapping form data), adjusting the regex if floats are needed.

MATCHESSolution

Use `to_char()` data type formatting function in your `select` — If you want that format to be available without needing `to_char()` in your `select`. Tension: I want a dash between then first and second digit. Outcome: Use `to_char()` data type formatting function in your `select`.

MATCHESSolution

numberFormatter.locale = locale // FIX1. Outcome: numberFormatter.locale = locale // FIX2.

MATCHESSolution

Use a smaller unit of time, such as minutes or even seconds, so fractional hours become whole numbers

MATCHESSolution

Use regex extraction and cast matched numbers to NUMERIC for ordering

MATCHESSolution

So the idea is to lpad the numerical identifiers with zeros, so they all contain the same amount of characters and then sort them like strings. — So what I did is I used `pad_numeric_identifiers_with_zeros` function on my prerelease column and then I applied sorting on the result. Tension: Sometimes you cannot use libraries. Outcome: I found a solution.

MATCHESSolution

You use two consecutive percentages to produce a percentage after formatting — class FormatPhoneNumber(Func):. Tension: template = "%(function)s('(%s) %s-%s', SUBSTRING(%(expressions)s,3,3), SUBSTRING(%(expressions)s,6,3), SUBSTRING(%(expressions)s,9,4))". Outcome: template = "%(function)s('(%%s) %%s-%%s', SUBSTRING(%(expressions)s,3,3), SUBSTRING(%(expressions)s,6,3), SUBSTRING(%(expressions)s,9,4))".

MATCHESSolution

Technically, it's not 100% free of undefined behavior. — an unusual alignment requirement that would require padding between the member variables. Tension: Nevertheless, it should be a reliable example.

MATCHESSolution

$ gcc -s -O2 -W -Wall -Wextra -o ot ot.c -lssl && ./ot && echo OK. Tension: without the leading `$`. Outcome: gcc -s -O2 -W -Wall -Wextra -o ot ot.c -lssl && ./ot && echo OK.

MATCHESSolution

The latter is among the replacements commonly recommended for the former. — printf(user_input). Tension: It resolves the issue that makes `printf(user_input)` particularly dangerous. Outcome: `printf("%s", user_input)`.

MATCHESSolution

Check your server's timezone. — the formatting you're doing at the backend. Tension: it could be from the formatting you're doing at the backend. Outcome: make sure it's not formatting based on a specific time and timezone.

MATCHESSolution

Solved it by using watch from RHF — I listen for values change. Tension: assign formatted values when needed. Outcome: assign formatted values when needed.

MATCHESSolution

I suggest converting `DateFormat` to a utility function that returns the computed string value. Tension: Passing JSX isn't valid.

MATCHESSolution

Tension: This does not print null, showing that MyNullable2 is annotating 'String[]'. Outcome: System.out.println(type.getAnnotation(MyNullable2.class));.

MATCHESSolution

The Java specification requires a troublesome double rounding in this situation. Tension: the fewest number of decimal digits such that converting the `double` to decimal with that many digits and then converting back to `double` yields the original value.

MATCHESSolution

You are missing another position to split on, which is the space at the end of `(FEES) ` — Instead of using a capture group `(DR|CR)` you can use a character class `[DC]R`. Tension: you can assert a digit to the right. Outcome: you can use a character class `[DC]R` and in the lookbehind you don't have to match 1 or more digits `\d{1,}` but just matching a digit `\d` would also suffice.

MATCHESSolution

An example is the single-precision value `2097152.25`. — The shortest round-trip representations are `2097152.2` and `2097152.3`. Tension: The former is chosen because `2` is even. Outcome: The former is chosen because `2` is even.

MATCHESSolution

A simple way to do this is with a variadic template and a fold expression. — for any mismatch in size. Tension: I have 4 but that might go up. Outcome: return ((first.size() == rest.size()) && ...);.

MATCHESSolution

Provide a limited family of macros for fixed arities such as 0 to 10, and add more copies if you need higher arities

MATCHESSolution

adding `where <= lim - 2` guard. Tension: This ensures at least 2 bytes remain (the sign/prefix byte + at least 1 data byte) before entering the base-256 decoder. Outcome: Fixed in GNU tar release_1_35 (commit 3da7840, Feb 11 2023).

MATCHESSolution

Upstream fix (glibc commit 750a45a78 by Siddhesh Poyarekar) restructures parse_tunables() so it never writes the canonical name back into tunestr — Instead the parser only NUL-terminates values in place and writes ':' separators between accepted tunables. Tension: so the write cursor can never exceed the read cursor.

MATCHESSolution

Change: `op[-1].value.intval <<= shift;` — In zbitshift() at psi/zrelbit.c. Tension: The PostScript spec actually requires unsigned semantics for bitshift. Outcome: To: `op[-1].value.intval = (ps_int)((ps_uint)op[-1].value.intval << shift);`.

MATCHESSolution

Patch (from commit dcc367f148) — elf/dl-tunables.c. Tension: malformed, of the form name=name=val ... processed twice.

MATCHESSolution

Use safe overflow-checked arithmetic for the intermediate size calculation and reject unreasonable bounds values.

MATCHESSolution

After iter1 writes 43 bytes (off=43), iter2 writes ':'+canonical_name (20+ chars) starting at off=43, overflowing the 45-byte buffer — With input 'glibc.malloc.mxfast=glibc.malloc.mxfast=512' (43 bytes), the buffer is 45 bytes. Tension: overflowing the 45-byte buffer. Outcome: Verified by examining fix commit 1056e5b4c3.

MATCHESSolution

Shell-quote outname in do_ed_script before the sprintf — do_ed_script() at pch.c:2399-2403. Tension: avoid shell interpretation entirely.

MATCHESSolution

deduplicated stream-json final result text. Tension: schema drift is scored instead of discarded. Outcome: added a Markdown fallback parser for `<finding>` blocks.

MATCHESSolution

The fix is to add a maximum iteration counter to the outer Tonelli-Shanks loop to prevent infinite loops when given invalid input parameters. — OpenSSL's patch adds a check to limit the maximum number of iterations of the outer while loop. Tension: a reasonable limit would be the number of bits in the prime (or a constant multiple thereof). Outcome: Additionally, stronger validation of the prime `p` parameter would help prevent this attack vector.

MATCHESSolution

Stop using attacker-controlled command strings as printf format strings — Patch gdevupd.c so each of the four call sites emits the parameter as raw bytes.

MATCHESSolution

Tension: The 0.45 (vs 0.5) leaves padding so the design isn't clipped at the rim. Outcome: Verify with a viewport screenshot from multiple angles before shipping — single-island UVs only look right if every face of the prop reads the design correctly.

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