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What's the difference between JPA and Spring Data JPA?
I am a bit confused about the difference between Spring Data-JPA and JPA. I know about JPA that it is a specification for persisting the Java Objects to a relational database using popular ORM technology.
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How do I check if a variable exists?
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Ok, and how can i check attribute existing in class?
– Max Frai
May 9 '09 at 13:19
8
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BigDecimal setScale and round
...lluded to but not directly addressed is the difference between "precision" and "scale" and how they are used in the two statements. "precision" is the total number of significant digits in a number. "scale" is the number of digits to the right of the decimal point.
The MathContext constructor onl...
How SignalR works internally?
...connection. It gives you two programming models over that connection (hubs and persistent connections). SignalR has a concept of transports, each transport decides how data is sent/received and how it connects and disconnects.
SignalR has a few built in transports:
WebSockets
Server Sent Events
F...
Calling Objective-C method from C++ member function?
...g they can be mixed. If you want to keep them separate, you can set up a standard C wrapper function that gives the Objective-C object a usable C-style interface from non-Objective-C code (pick better names for your files, I have picked these names for verbosity):
MyObject-C-Interface.h
#ifndef __...
bash: Bad Substitution
...readlink -f $(which sh)
/bin/dash
So if you chmod +x your_script_file.sh and then run it with ./your_script_file.sh, or if you run it with bash your_script_file.sh, it should work fine.
Running it with sh your_script_file.sh will not work because the hashbang line will be ignored and the script w...
SqlDataAdapter vs SqlDataReader
...ver once
Is not as useful for updating back to the database
On the other hand, it:
Only has one record in memory at a time rather than an entire result set (this can be HUGE)
Is about as fast as you can get for that one iteration
Allows you start processing results sooner (once the first record is...
Copying text with color from Notepad++
...anager.
update As of version 6.1.5 (or maybe earlier) this ships with a standard install of Notepad++
update As of 2019 NppExport is not included by default in the Notepad++ 64 bits version (github issue). You can download the 64 bits version of NppExport here: [github]
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Timeout on a function call
I'm calling a function in Python which I know may stall and force me to restart the script.
18 Answers
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Is it possible to set a custom font for entire of application?
... same.
Is it possible to set this as default font, at application start up and then use it elsewhere in the application? When set, how do I use it in my layout XMLs?
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