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How do you create a read-only user in PostgreSQL?
...test versions of PostgreSQL, you can grant permissions on all tables/views/etc in the schema using a single command rather than having to type them one by one:
GRANT SELECT ON ALL TABLES IN SCHEMA public TO xxx;
This only affects tables that have already been created. More powerfully, you can aut...
Difference between /res and /assets directories
...ng alternatives for different languages, OS versions, screen orientations, etc., as described here. None of that is available with assets. Also, many parts of the API support the use of resource identifiers. Finally, the names of the resources are turned into constant field names that are checked at...
How to duplicate sys.stdout to a log file?
...ty to write to multiple log files at once, or handle different log levels, etc.
These are all straightforward enough that I'm comfortable leaving them as exercises for the reader. The key insight here is that print just calls a "file-like object" that's assigned to sys.stdout.
...
How do I check if a given string is a legal/valid file name under Windows?
..., LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, LPT9 (and avoid AUX.txt, etc)
The file name is all periods
Some optional things to check:
File paths (including the file name) may not have more than 260 characters (that don't use the \?\ prefix)
Unicode file paths (including the file name) with...
How to handle button clicks using the XML onClick within Fragments
... could just do this:
Activity:
Fragment someFragment;
//...onCreate etc instantiating your fragments
public void myClickMethod(View v) {
someFragment.myClickMethod(v);
}
Fragment:
public void myClickMethod(View v) {
switch(v.getId()) {
// Just like you were doing
}
} ...
Relational Database Design Patterns? [closed]
...versally applicable data models (employees, accounts, shipping, purchases, etc), Volume 2 contains industry specific data models (accounting, healthcare, etc), Volume 3 provides data model patterns.
Finally, while this book is ostensibly about UML and Object Modelling, Peter Coad's Modeling in Colo...
What is the difference between ApplicationContext and WebApplicationContext in Spring MVC?
...ion Context which is designed to work with the standard javax.servlet.ServletContext so it's able to communicate with the container.
public interface WebApplicationContext extends ApplicationContext {
ServletContext getServletContext();
}
Beans, instantiated in WebApplicationContext will al...
Career day in kindergarten: how to demonstrate programming in 20 minutes? [closed]
...ght 90 Degrees? I'm sure there are other games like going through a maze, etc.
I'd think you'd keep their attention if you can keep them moving. This will spark the interest. They'll figure out later that the job is sedentary. ;)
...
Using a Single Row configuration table in SQL Server database. Bad idea?
...ormation, Shipping account IDs, PayPal API keys, notification preferences, etc.
12 Answers
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ORACLE 启动提示 内存不足 OUTOF MEMORY - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
ORACLE 启动提示 内存不足 OUTOF MEMORY原配置 etc sysctl.conf文件kernel.shmall = 2097152kernel.shmmax = 2147483648kernel.shmmni = 4096kernel.sem = 250 32000 10...
原配置 /etc/sysctl.conf文件
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kerne...