やたらとこけるJSONを出力する商用のツールを追いかけていたら、浮動小数点の表記に問題があった。1.e-2っていうのはJSON的にはmalformed numberなんだろうか？
Perl
use strict; use warnings; use JSON; print decode_json('{"num": 1.e-2}')->{'num'};
実行
$ perl jsontest.pl malformed number (no digits after decimal point), at character offset 10 (before "e-2}") at jsontest.pl line 5.
Python
>>> import json >>> json.loads('{"num":1.0e-2}') {u'num': 0.01} >>> json.loads('{"num":1e-2}') {u'num': 0.01} >>> json.loads('{"num":1.e-2}') Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/__init__.py", line 326, in loads return _default_decoder.decode(s) File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/decoder.py", line 366, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) File "/usr/local/Cellar/python/2.7.2/lib/python2.7/json/decoder.py", line 382, in raw_decode obj, end = self.scan_once(s, idx) ValueError: Expecting , delimiter: line 1 column 8 (char 8)