大约有 1,000 项符合查询结果(耗时:0.0100秒) [XML]

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How to deal with floating point number precision in JavaScript?

... @mlathe: Doh.. ;P... Between 2⁵²=4,503,599,627,370,496 and 2⁵³=9,007,199,254,740,992 the representable numbers are exactly the integers. For the next range, from 2⁵³ to 2⁵⁴, everything is multiplied by 2, so the representable numbers are the even ones, etc. Conversely, for the ...
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How many files can I put in a directory?

...ld answer, I know… but when you write EXT4 – Maximum number of files: 2³² - 1 (4,294,967,295) and Maximum number of files per directory: unlimited you really confused me because 2³² - 1 != “unlimited”. I guess I need a coffee now. ;) Nevertheless +1 – e-sushi ...
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Difference between single and double square brackets in Bash

...d1 && cmd2 [ a = a -a b = b ]: equivalent, but deprecated by POSIX³ [ a = a ] && [ b = b ]: POSIX and reliable equivalent ( [[ (a = a || a = b) && a = b ]]: false [ ( a = a ) ]: syntax error, () is interpreted as a subshell [ \( a = a -o a = b \) -a a = b ]: equivalent, ...
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How do I copy a string to the clipboard on Windows using Python?

...h Unicode characters too. I have tested characters ±°©©αβγθΔΨΦåäö to work on Win10 64-bit, with Python 3.5 and pyperclip 1.5.27. – np8 Jul 3 '16 at 15:55 ...
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]

... edited Apr 30 '17 at 0:51 buræquete 12.5k44 gold badges3131 silver badges6262 bronze badges answered Jan 7 '09 at 21:11 ...
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Difference between InvariantCulture and Ordinal string comparison

...iosyncrasies out there. Ordinal 0 9 A Ab a aB aa ab ss Ä Äb ß ä äb ぁ あ ァ ア 亜 A IgnoreCase 0 9 a A aa ab Ab aB ss ä Ä äb Äb ß ぁ あ ァ ア 亜 A -------------------------------------------------------------------- InvariantCulture 0 9 a A A ä Ä aa ab aB ...
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What is the difference between encode/decode?

...n as encoding. Use u'...'.encode(encoding). Example: >>> u'æøå'.encode('utf8') '\xc3\x83\xc2\xa6\xc3\x83\xc2\xb8\xc3\x83\xc2\xa5' >>> u'æøå'.encode('latin1') '\xc3\xa6\xc3\xb8\xc3\xa5' >>> u'æøå'.encode('ascii') UnicodeEncodeError: 'asci...
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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?

...d1 && cmd2 [ a = a -a b = b ]: equivalent, but deprecated by POSIX³ [ a = a ] && [ b = b ]: POSIX and reliable equivalent ( [[ (a = a || a = b) && a = b ]]: false [ ( a = a ) ]: syntax error, () is interpreted as a subshell [ \( a = a -o a = b \) -a a = b ]: equivalent, ...
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Does PostgreSQL support “accent insensitive” collations?

... unaccent() always substitutes a single letter: SELECT unaccent('Œ Æ œ æ ß'); unaccent ---------- E A e a S You will love this update to unaccent in Postgres 9.6: Extend contrib/unaccent's standard unaccent.rules file to handle all diacritics known to Unicode, and expand ligatures cor...
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Filling a DataSet or DataTable from a LINQ query result set

...wered Aug 15 '08 at 16:42 Lars MæhlumLars Mæhlum 5,86633 gold badges2424 silver badges3232 bronze badges ...