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月光杯：
问题解决了吗？
Exceptions in HDFS -
iostreamin：
神，好厉害，这是我找到的唯一可以ac的Java代码，厉害。
[leetcode] word ladder II -
standalone：
One answer I agree with:引用Whene ...
How many string objects are created? -
DiaoCow：
不错！，一开始对这些确实容易犯迷糊
erlang中的冒号 分号 和 句号 -
standalone：
Exception in thread "main& ...
one java interview question
文章列表
>>> hex_string = "deadbeef"
Convert it to a string (Python ≤ 2.6):
>>> hex_data = hex_string.decode("hex")
>>> hex_data
"\xde\xad\xbe\xef"
or since Python 2.7 and Python 3.0:
>>> bytearray.fromhex(hex_data)
bytearray(b'\xde\xad\xbe\x ...
size of array
- 博客分类：
- c
#define num(x) (sizeof (x) / sizeof (*x))
int main(){
int number[10] = {1,1,1,1,1,1};
char *teststr[20] = {"","","","","","","","",""};
printf("Size of number[10] is %d\n", (int)nu ...
std::map<char,int> mymap;
std::map<char, set<string> > mmap;
mmap['a'].insert("hello");
mmap['a'].insert("hello1");
map<char, set<string> >::iterator iter = mmap.begin();
for(;iter!=mmap.end();++iter){
cout << iter-> ...
http://stackoverflow.com/questions/12671406/bash-removing-part-of-a-string
var="Memory Used: 19.54M"
var=${var#*: } # Remove everything up to a colon and space
var=${var%M} # Remove the M at the end
The main hint is in the docs, if it says 'Steals a reference' than the function basically takes ownership, if it says 'New Reference' than it did an INCREF for you, if nothing is said it probably does an INCREF and DECREF pair as needed.
http://stackoverflow.com/questions/10863669/lost-on-py-decref- ...
Use chr() and ord():
>>> chr(97)
'a'
>>> ord('a')
97
ruby-doc.org/core-2.1.2/String.html
typedef struct atom {
int element;
struct atom *next;
};
vs.
typedef struct {
int element;
struct atom *next;
} atom;
http://stackoverflow.com/questions/18806392/typedef-struct-declarations
#include <iostream>
#include <tr1/functional>
using std::tr1::bind;
using std::tr1::function;
using std::tr1::placeholders::_1;
using std::tr1::placeholders::_2;
class CTest
{
public:
int test( int a, int b , int c, int d)
{
...
http://stackoverflow.com/questions/21558/in-c-what-is-a-virtual-base-class
主要是为了避免歧义。
http://www.iteye.com/topic/1125183
最近在学习c，话说从java转向c真的蛮痛苦。Anyway，学习就是一份好经历。
看到如下一段code：
#define APP_TOOL_OP_TYPES(f) \
f(SIMPLE, "simple", FALSE) \
f(JSON, "json", TRUE) \
f(PYTHON, "python", TRUE) \
typedef ...
看了这个java nio的教程，明白了什么是Selector.wakeUp()
http://ifeve.com/selectors/
wakeUp()
某个线程调用select()方法后阻塞了，即使没有通道已经就绪，也有办法让其从select()方法返回。只要让其它线程在第一个线程调用select()方法的那个对象上调用Selector.wakeup()方法即可。阻塞在select()方法上的线程会立马返回。
如果有其它线程调用了wakeup()方法，但当前没有线程阻塞在select()方法上，下个调用select()方法的线程会立即“醒来（wake up）”。
The bug and fix is at https://issues.apache.org/jira/browse/HADOOP-10110
http://www.cab.u-szeged.hu/WWW/java/tutorial/i18n/exception/subclass.html