大约有 30,000 项符合查询结果（耗时：0.0367秒） [XML]
sed command with -i option (in-place editing) works fine on Ubuntu but not Mac [duplicate]
...u have installed or other gizmos I've seen suggested. I hope you keep the file under version control (or otherwise backed up) so that you can recover if there's a bug in your sed script. Of course, the .bak file gives you that protection.
– Jonathan Leffler
J...
How to log PostgreSQL queries?
...
In your data/postgresql.conf file, change the log_statement setting to 'all'.
Edit
Looking at your new information, I'd say there may be a few other settings to verify:
make sure you have turned on the log_destination variable
make sure you turn on...
How do you configure Django for simple development and deployment?
...hings manually, my earlier answer still applies:
I have multiple settings files.
settings_local.py - host-specific configuration, such as database name, file paths, etc.
settings_development.py - configuration used for development, e.g. DEBUG = True.
settings_production.py - configuration used fo...
What is the purpose of Serialization in Java?
..., rather than hold onto the giant object in memory, just cache it out to a file via serialization, and read it in later when it's needed.
Cross JVM Synchronization: Serialization works across different JVMs that may be running on different architectures.
...
Android: Want to set custom fonts for whole application not runtime
...me ? (i.e. from xml if possible or only once for whole application in JAVA file)
11 Answers
...
What do the makefile symbols $@ and $< mean?
...target being generated, and $< the first prerequisite (usually a source file). You can find a list of all these special variables in the GNU Make manual.
For example, consider the following declaration:
all: library.cpp main.cpp
In this case:
$@ evaluates to all
$< evaluates to library.cpp
$...
Storing Images in PostgreSQL
...ck your needs and server configs (ex. Apache modules): store thumbnails at file system may be better, compare performances. Remember that it is a (unified) web-service, then can be stored at a separate database (with no backups), serving many tables. See also PostgreSQL binary data types manual, t...
How do you search an amazon s3 bucket?
I have a bucket with thousands of files in it. How can I search the bucket? Is there a tool you can recommend?
21 Answers
...
How to check for a valid URL in Java?
... 5 6 7 8 9
/**
* Schema/Protocol (ie. http:, ftp:, file:, etc).
*/
private static final int PARSE_URL_SCHEME = 2;
/**
* Includes hostname/ip and port number.
*/
private static final int PARSE_URL_AUTHORITY = 4;
private static final int PARSE_URL_PATH = 5;
private static...
Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...updated the path in etc/mongodb.conf to /data/db and deleted the old mongo files in /var/lib/mongodb directory.
Then I ran sudo service mongodb start and waited about a minute. If you try to connect to 27017 immediately you won't be able to.
After a minute check /data/db (EBS volume) and mongo shoul...