大约有 40,000 项符合查询结果（耗时：0.0450秒） [XML]
How to remove an item for a OR'd enum?
...t X & ~Q clears any bits that were set in Q from X and returns the result.
So to remove or clear the BLUE bits, you use the following statement:
colorsWithoutBlue = colors & ~Blah.BLUE
colors &= ~Blah.BLUE // This one removes the bit from 'colors' itself
You can also specify multiple...
Hashing a dictionary?
...e see the comments below, why this approach might not produce a stable result.
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Making 'git log' ignore changes for certain paths
...e character for shell
expansion since it needs quoting.
So add '^' as an alternative alias for an excluding pathspec entry.
Note that, before Git 2.28 (Q3 2020), the use of negative pathspec, while collecting paths including untracked ones in the working tree, was broken.
See commit f1f061e (05 Ju...
How to add leading zeros for for-loop in shell? [duplicate]
...sh-4.
If you want to use printf, nothing prevents you from putting its result in a variable for further use:
$ foo=$(printf "%02d" 5)
$ echo "${foo}"
05
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Suppress deprecated import warning in Java
... It doesn't seem to work with command-line "javac" or ant's <javac> task. Neither does the -Xlint:-deprecation flag. Seems like a javac bug.
– Archie
Jul 10 '11 at 15:14
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How to check Google Play services version?
...ing whether there was an error.
Can be one of following in ConnectionResult:
SUCCESS, SERVICE_MISSING, SERVICE_VERSION_UPDATE_REQUIRED,
SERVICE_DISABLED, SERVICE_INVALID.
It will ensure that the device is using the version your app requires, if not, then you can take action according to...
What does collation mean?
...@Quassnoi: Well yes, and? Am I implying anywhere that I'm not crazy? ;o) (although thank God for Unicode, I'd be stark raving mad if I still had to work with nation-specific charsets)
– Piskvor left the building
Dec 27 '10 at 13:09
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INSERT INTO…SELECT for all MySQL columns
... ..., coln)
SELECT col1, col2, ..., coln
FROM this_table
WHERE entry_date < '2011-01-01 00:00:00';
If the id columns is an auto-increment column and you already have some data in both tables then in some cases you may want to omit the id from the column list and generate new ids instead to avoi...
Any implementation of Ordered Set in Java?
...
Class LinkedHashSet<E>
– Chandra Sekhar
Jan 3 '12 at 13:45
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string c_str() vs. data()
...reference operator[](size_type pos) const noexcept;
1 Requires: pos <= size().
2 Returns: *(begin() + pos) if pos < size(), otherwise a reference to an object of type T
with value charT(); the referenced value shall not be modified.
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