大约有 40,000 项符合查询结果（耗时：0.0696秒） [XML]
Volatile boolean vs AtomicBoolean
...Consider this example of a volatile integer:
volatile int i = 0;
void incIBy5() {
i += 5;
}
If two threads call the function concurrently, i might be 5 afterwards, since the compiled code will be somewhat similar to this (except you cannot synchronize on int):
void incIBy5() {
int temp;
...
postgres default timezone
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I have tried by changing the timezone to GMT in postgresql.conf and it seems to be working fine.
– Muhammad Usama
Jul 12 '11 at 14:15
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How to enable PHP's openssl extension to install Composer?
...edit the file named: php.ini.
Uncomment the line extension=php_openssl.dll by removing the semicolon at the beginning.
Now you are good to install Composer.
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What is maximum query size for mysql?
... SHOW VARIABLES LIKE 'max_allowed_packet';
This gives you the answer in bytes. for e.g max_allowed_packet=1048576 or 1mb
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CSS – why doesn’t percentage height work? [duplicate]
... 50% doesn't yield a well defined value unless you break the feedback loop by giving the parent element a specific height.
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What is the difference between Factory and Strategy patterns?
...r example, we have a ButtonCreationFactory interface, which is implemented by two factories, the first WindowsButtonCreationFactory (creates buttons with Windows look and feel) and the second LinuxButtonCreationFactory (creates buttons with Linux look and feel). So both these factories do have the s...
SharedPreferences.onSharedPreferenceChangeListener not being called consistently
...shaAleayoub, read about android.app.supernotcalledexception it is required by android implementation.
– Samuel
Apr 4 '16 at 6:46
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Is there a portable way to print a message from the C preprocessor?
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#pragma message () is not supported by older versions of gcc (such as gcc 4.1.2, the default version on RHEL5). I have yet to find an appropriate equivalent for these older versions - #warning is not going to be great, as warnings are treated as errors for us...
Change SQLite default settings
...Windows, you should create the file %USERPROFILE%\.sqliterc. For instance, by executing the following on the command-line: (echo .mode columns && echo .headers on) >%USERPROFILE%\.sqliterc
– Dennie
Apr 13 '17 at 12:45
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How to disable the application pool idle time-out in IIS7?
...s the granularity of the setting, in this case the value must be divisable by 60 [one minute]).
If you see a starting permissible value of 0 then that usually indicates the setting can be disabled.
IIS7 Application Pool Idle Time-out Settings
Brad Kingsley is the founder and CEO of OrcsWeb who...