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Named regular expression group “(?Pregexp)”: what does “P” stand for?
...a (sub)pattern for later use in the regex. See the documentation here for details about how such groups are used.
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How to install an apk on the emulator in Android Studio?
...if it already existe use adb install -r "your_apk_file.apk"
sorry for the detailed instruction as I said for full beginners
Hope this help.
Regards,
Tarek
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What is __gxx_personality_v0 for?
...cated than that; there's some conditional compilation that can change some details).
So, as long as your code isn't actually using exception handling, defining the symbol as void* won't affect anything, but as soon as it does, you're going to crash - __gxx_personality_v0 is a function, not some glo...
What is the purpose of the vshost.exe file?
...st.exe - a special version of the executable to aid debuging; see MSDN for details
.pdb - the Program Data Base with debug symbols
.vshost.exe.manifest - a kind of configuration file containing mostly dependencies on libraries
...
Meaning of acronym SSO in the context of std::string
...ver actually read any implementation of SSO "in the wild".
Implementation details
At the minimum, a std::string needs to store the following information:
The size
The capacity
The location of the data
The size could be stored as a std::string::size_type or as a pointer to the end. The only dif...
NOW() function in PHP
...
date('Y-m-d H:i:s')
Look here for more details: http://pl.php.net/manual/en/function.date.php
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Interfaces with static fields in java for sharing 'constants'
...terfaces. That a class uses some constants internally is an implementation detail. Implementing a constant interface causes this implementation detail to leak into the class's exported API. It is of no consequence to the users of a class that the class implements a constant interface. In fact, it ma...
What is the difference between mocking and spying when using Mockito?
...vice)
.when(target).proxyWithdrawMoneyServiceCreator();
More detail in the link above.
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add column to mysql table if it does not exist
...e_name VARCHAR(100),
IN param_column VARCHAR(100),
IN param_column_details VARCHAR(100)
)
BEGIN
IF NOT EXISTS(
SELECT NULL FROM information_schema.COLUMNS
WHERE COLUMN_NAME=param_column AND TABLE_NAME=param_table_name AND table_schema = param_schema
)
THEN
set @p...
How to save a BufferedImage as a File
...ained are the method's objective, parameters, returns, and throws, in more detail:
Writes an image using an arbitrary ImageWriter that supports the given format to a File. If there is already a File present, its contents are discarded.
Parameters:
im - a RenderedImage to be written.
formatName - a ...