大约有 19,024 项符合查询结果（耗时：0.0239秒） [XML]
How to deal with a slow SecureRandom generator?
...but-slightly-less-secure /dev/urandom on Linux using:
-Djava.security.egd=file:/dev/urandom
However, this doesn't work with Java 5 and later (Java Bug 6202721). The suggested work-around is to use:
-Djava.security.egd=file:/dev/./urandom
(note the extra /./)
...
How to list the tables in a SQLite database file that was opened with ATTACH?
... list the tables, and the rows within those tables in an SQLite database file - once I have attached it with the ATTACH command on the SQLite 3 command line tool?
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MySQL load NULL values from CSV data
I have a file that can contain from 3 to 4 columns of numerical values which are separated by comma. Empty fields are defined with the exception when they are at the end of the row:
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How do I run a shell script without using “sh” or “bash” commands?
...
Add a "shebang" at the top of your file:
#!/bin/bash
And make your file executable (chmod +x script.sh).
Finally, modify your path to add the directory where your script is located:
export PATH=$PATH:/appropriate/directory
(typically, you want $HOME/bin...
How to run a PowerShell script
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If you are on PowerShell 2.0, use PowerShell.exe's -File parameter to invoke a script from another environment, like cmd.exe. For example:
Powershell.exe -File C:\my_path\yada_yada\run_import_script.ps1
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Retrieve version from maven pom.xml in code
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Assuming you're using Java, you can:
Create a .properties file in (most commonly) your src/main/resources directory (but in step 4 you could tell it to look elsewhere).
Set the value of some property in your .properties file using the standard Maven property for project version:
fo...
How do you debug PHP scripts? [closed]
...register_shutdown_function('shutdown_handler');
function assert_callcack($file, $line, $message) {
throw new Customizable_Exception($message, null, $file, $line);
}
function error_handler($errno, $error, $file, $line, $vars) {
if ($errno === 0 || ($errno & error_reporting()) === 0) {
...
How do I create a namespace package in Python?
...t that can be created by an import foo:
A module represented by a foo.py file
A regular package, represented by a directory foo containing an __init__.py file
A namespace package, represented by one or more directories foo without any __init__.py files
Packages are modules too, but here I mean "...
Maven build failed: “Unable to locate the Javac Compiler in: jre or jdk issue”
...JRE type: Standard VM JRE
Name: jdk1.6.0_18
JRE home directory: C:\Program Files (x86)\Java\jdk1.6.0_18
If this is not the case, it's possible that the brackets and spaces in the JAVA_HOME path are causing issues. Try copying your JDK to a different location and updating your JAVA_HOME.
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multiple definition of template specialization when using different objects
When I use a specialized template in different object files, I get a "multiple definition" error when linking. The only solution I found involves using the "inline" function, but it just seems like some workaround. How do I solve that without using the "inline" keyword? If that's not possible, why?
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