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Should private helper methods be static if they can be static
...ate static void doSomethingStatic(int arg) { }
public static void main(String[] args) {
// do it twice both ways
doSomethingStatic(0);
doSomethingStatic(0);
TestBytecodeSize t = new TestBytecodeSize();
t.doSomething(0);
t.doSomething(0);
}
}
...
Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...
...<< EOF #include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #define CANARY"in_the_coal_mine" struct { char buffer[1024]; char canary[sizeof(CANARY)]; } temp = { "buffer", CANARY }; int main(void) { struct hostent resbuf; struct hostent *result; int herrno;...
Oracle中translate与replace的使用 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...length(trim(a.t_no));
2.replace
语法：REPLACE(char, search_string,replacement_string)
用法：将char中的字符串search_string全部转换为字符串replacement_string。
举例：SQL> select REPLACE('fgsgswsgs', 'fk' ,'j') 返回值 from dual;
返...
boost库编译问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
boost库编译问题boost::property_tree::xml_writer_settings<std::string> settings(' t', 1, "GB2312");报错：char不能转换为std::string。1.5...boost::property_tree::xml_writer_settings<std::string> settings('\t', 1, "GB2312");
报错：char不能转换为std::string。
1.54 版本 报...
How to create Android Facebook Key Hash?
...SHA");
md.update(signature.toByteArray());
String hashKey = new String(Base64.encode(md.digest(), 0));
Log.i(TAG, "printHashKey() Hash Key: " + hashKey);
}
} catch (NoSuchAlgorithmException e) {
Log.e(TAG, "printHashKey(...
How to save/restore serializable object to/from file?
...;/param>
public void SerializeObject<T>(T serializableObject, string fileName)
{
if (serializableObject == null) { return; }
try
{
XmlDocument xmlDocument = new XmlDocument();
XmlSerializer serializer = new XmlSerializer(serializableO...
ruby 1.9: invalid byte sequence in UTF-8
...
In Ruby 1.9.3 it is possible to use String.encode to "ignore" the invalid UTF-8 sequences. Here is a snippet that will work both in 1.8 (iconv) and 1.9 (String#encode) :
require 'iconv' unless String.method_defined?(:encode)
if String.method_defined?(:encode)
...
java get file size efficiently
...c abstract long getResult() throws Exception;
public static void main(String[] args) throws Exception {
int runs = 5;
int iterations = 50;
EnumMap<FileSizeBench, Long> durations = new EnumMap<FileSizeBench, Long>(FileSizeBench.class);
for (int i = 0...
What's the difference between echo, print, and print_r in PHP?
... are more or less the same; they are both language constructs that display strings. The differences are subtle: print has a return value of 1 so it can be used in expressions whereas echo has a void return type; echo can take multiple parameters, although such usage is rare; echo is slightly faster ...
Regex match everything after question mark?
...entheses are a capturing group that you can use to extract the part of the string you are interested in.
If the string can contain new lines you may have to use the "dot all" modifier to allow the dot to match the new line character. Whether or not you have to do this, and how to do this, depends o...