大约有 9,000 项符合查询结果（耗时：0.0294秒） [XML]
How to generate a random integer number from within a range
This is a follow on from a previously posted question:
11 Answers
11
...
What is the difference between Trap and Interrupt?
...'s also the usual way to invoke a kernel routine (a system call) because those run with a higher priority than user code. Handling is synchronous (so the user code is suspended and continues afterwards). In a sense they are "active" - most of the time, the code expects the trap to happen and relies ...
Can I have multiple Xcode versions installed?
Is it possible to have more than one version of Xcode installed at the same time?
12 Answers
...
Any reason to clean up unused imports in Java, other than reducing clutter?
... the list interface.
In Eclipse you can always use a shortcut (depends on OS - Win: Ctrl + SHIFT + O and Mac: COMMAND + SHIFT + O) to organize the imports. Eclipse then cleans up the import section removes all the stale imports etc. If you are needing a imported thing again eclipse will add them au...
How to extract text from a string using sed?
...]] instead. You will also need to escape the + or use the -r switch (-E on OS X).
Note that [0-9] works as well for Arabic-Hindu numerals.
share
|
improve this answer
|
foll...
Can I compile all .cpp files in src/ to .o's in obj/, then link to binary in ./?
... $@ $<
Automatic dependency graph generation
A "must" feature for most make systems. With GCC in can be done in a single pass as a side effect of the compilation by adding -MMD flag to CXXFLAGS and -include $(OBJ_FILES:.o=.d) to the end of the makefile body:
CXXFLAGS += -MMD
-include $(OB...
How to write multiple line string using Bash with variables?
...
The heredoc solutions are certainly the most common way to do this. Other common solutions are:
echo 'line 1, '"${kernel}"'
line 2,
line 3, '"${distro}"'
line 4' > /etc/myconfig.conf
and
exec 3>&1 # Save current stdout
exec > /etc/myconfig.conf
e...
Is there a command like “watch” or “inotifywait” on the Mac?
...
fswatch
fswatch is a small program using the Mac OS X FSEvents API to monitor a directory.
When an event about any change to that directory is received, the specified
shell command is executed by /bin/bash
If you're on GNU/Linux,
inotifywatch (part of the
inotify-tools pac...
How to check if AlarmManager already has an alarm set?
...
Following up on the comment ron posted, here is the detailed solution. Let's say you have registered a repeating alarm with a pending intent like this:
Intent intent = new Intent("com.my.package.MY_UNIQUE_ACTION");
PendingIntent pendingIntent = PendingInte...
How safe is it to store sessions with Redis?
...ore, but at a high level, here are your options -
If you cannot afford losing any sessions, set appendfsync always in your configuration file. With this, Redis guarantees that any write operations are saved to the disk. The disadvantage is that write operations will be slower.
If you are okay wit...