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What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
In the Mac and iOS platforms, memory leaks are often caused by unreleased pointers. Traditionally, it has always been of utmost importance to check your allocs, copies and retains to make sure each has a corresponding release message.
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Difference between a user and a schema in Oracle?
......
Technically -- A schema is the set of metadata (data dictionary) used by the database,
typically generated using DDL. A schema defines attributes of the database, such as
tables, columns, and properties. A database schema is a description of the data in a
database.
...
How is location accuracy measured in Android?
...nyone know the proper interpretation of the accuracy measurements returned by getAccuracy()? For instance, are they calculated as:
...
Understanding PrimeFaces process/update and JSF f:ajax execute/render attributes
...y). JSF will skip processing of all other components which are not covered by process attribute. Also, components whose rendered attribute evaluates to false during apply request values phase will also be skipped as part of safeguard against tampered requests.
Note that it's in case of ActionSource ...
Rebasing a Git merge commit
...rges option on git rebase, which is described as follows from the manual:
By default, a rebase will simply drop merge commits from the todo list, and put the rebased commits into a single, linear branch. With --rebase-merges, the rebase will instead try to preserve the branching structure within th...
Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint
... for me to find the specific views in the storyboard source code (probably by searching the text for "17" initially), or at least a few likely candidates. From there I should be able to actually figure out which views these are in the storyboard which will make it a lot easier to identify the proble...
vs
... large amount of code uses the last option, simply because it's easy to do by accident on an implementation where <cstdint> puts the symbols in the global namespace. You should try to use the first. The second has one virtue, that it is guaranteed to put stuff in the global namespace instead o...
What does threadsafe mean?
...ode is thread-safe if it functions correctly during
simultaneous execution by multiple threads.”
“In particular, it must satisfy the need for multiple threads to
access the same shared data, …”
“…and the need for a shared piece of data to be accessed by only one
thread at any given time....
How to change owner of PostgreSql database?
...to admin database and update DB ownership:
psql
postgres=# REASSIGN OWNED BY old_name TO new_name;
This is a global equivalent of ALTER DATABASE command provided in Frank's answer, but instead of updating a particular DB, it change ownership of all DBs owned by 'old_name'.
The next step is to up...
PostgreSQL query to list all table names?
...bases
SELECT table_schema,table_name FROM information_schema.tables
ORDER BY table_schema,table_name;
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