w********s
发帖数: 1570 | 1 没人看出bug么？
class MyString {
private:
char* _data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len+1];
memcpy(_data, s, _len);
_data[_len] = '\0';
}
public:
MyString() {
_data = NULL;
_len = 0;
}
MyString(const char* p) {
_len = strlen (p);
_init_data(p);
}
MyString(const MyString& str) {
_len = str._len;
_init_data(str._data);
std::cout << "Copy Constructor is called! source: " << str._data << std:
:endl;
}
MyStri... 阅读全帖 |
|
n*s
发帖数: 752 | 2 4. string transpose
import sys
def transpose(input,i):
mystr = list(input)
mystr[i],mystr[i+1] = mystr[i+1],mystr[i]
return ''.join(mystr)
def str_transpose():
print 'input two strings, separated by blank:'
a, b = sys.stdin.readline().split()
size = len(a)
if size != len(b) or sorted(a) != sorted(b):
return 'no way!'
next = [b]
parent = {b:None}
idx = size -1
notFound = True
while notFound:
newstr = []
for x in next:
... 阅读全帖 |
|
n*s
发帖数: 752 | 3 4. string transpose
import sys
def transpose(input,i):
mystr = list(input)
mystr[i],mystr[i+1] = mystr[i+1],mystr[i]
return ''.join(mystr)
def str_transpose():
print 'input two strings, separated by blank:'
a, b = sys.stdin.readline().split()
size = len(a)
if size != len(b) or sorted(a) != sorted(b):
return 'no way!'
next = [b]
parent = {b:None}
idx = size -1
notFound = True
while notFound:
newstr = []
for x in next:
... 阅读全帖 |
|
x******a
发帖数: 6336 | 4 【 以下文字转载自 Programming 讨论区 】
发信人: xiaojiya (xiaojiya), 信区: Programming
标 题: 请问关于overloading <<
发信站: BBS 未名空间站 (Wed Feb 27 11:59:50 2013, 美东)
I am working on the example in accelerated C++.
I have overloaded operator+= , operator+ , and operator<<.
the following code does not work.
I got "invalid operands to binary expression('ostream'(aka 'basic_ostream<
char>') and 'myString') when compiling the code.
myString s1="hello";
myString s2="world";
std::cout<< s1+s2 <
it worked in the foll... 阅读全帖 |
|
x******a
发帖数: 6336 | 5 I am working on the example in accelerated C++.
I have overloaded operator+= , operator+ , and operator<<.
the following code does not work.
I got "invalid operands to binary expression('ostream'(aka 'basic_ostream<
char>') and 'myString') when compiling the code.
myString s1="hello";
myString s2="world";
std::cout<< s1+s2 <
it worked in the following way.
myString s1="hello";
myString s2="world";
myString s=s1+s2;
std::cout<< s <
what should I do to make the first one work... 阅读全帖 |
|
l*********8
发帖数: 4642 | 6 Thank you for the comments.
I modified my code. But I still like the initialization list :-)
class MyStr {
MyStr() : data(NULL), size(0)
{
}
~MyStr()
{
if (data != NULL)
delete [] data;
}
MyStr(const MyStr& original) : data(NULL), size(0)
{
data = new char[original.size+1];
if(original.data == NULL)
return;
memcpy(data, original.data, original.size);
data[original.size] = '\0';
size = original.size;
}
private:
char* data;
int size;
} |
|
h**k
发帖数: 3368 | 7 MyStringArray[0] = MyString.substring(0, MyString.find(';') );
MyString.erase(0, MyString.find( ';' ) );
a |
|
l*********8
发帖数: 4642 | 8 class MyStr {
MyStr() : data(NULL), size(0)
{
}
MyStr(const MyStr& original) : data(NULL), size(0)
{
p = new char[original.size+1];
if (!p || !(original.data))
throw exception;
memcpy(p, original.data, original.size);
p[original.size] = '\0';
data = p;
size = original.size;
}
private:
char* data;
int size;
} |
|
m***n
发帖数: 2154 | 9 MyStr::MyStr(const MyStr& original)
{
p = new char[original.size+1];
memcpy(p, original.data, original.size);
p[original.size] = '\0';
}
char* data;
int size;
谢谢。更新了一下 ,还有问题么？
更新了成员变量。 |
|
c*****n
发帖数: 96 | 10 MyStr::MyStr(const MyStr& original)
{
p = new char[original.size+1];
memcpy(p, original.data, original.size);
==> p[original.size+1] = '\0';
}
There is a buffer overflow issue. Should be p[original.size] = '\0' |
|
t*******2
发帖数: 182 | 11 一老印，电面迟到15分钟，打过来也不花两分钟介绍一下team之类的，直接上题。。
1) Can you explain dependency injection with an example, in java.
我一下子懵了，听都没听说过这个东西，什么也扯不出来，只好老实承认没听说过。。
事后google了一下，好像是Spring framework里面的一个概念。。
2) Can you create memory leak with a sample program.
也是完全没准备过，想了两分钟想不出什么来，老印直接开始问下题
3) What do you think is the output of this sample program
public class MyThread implements Runnable {
String myString = "Yes ";
public void run() {
this.myString = "No ";
}
public static void main(String[] args) {
MyThread t ... 阅读全帖 |
|
f*******t
发帖数: 7549 | 12 大家来测试一下到底多少个Yes和No吧。加不加volatile关键字对结果有影响哦！
public class MyThread implements Runnable {
volatile String myString = "Yes";
public void run() {
this.myString = "No";
}
public static void main(String[] args) {
AtomicInteger[][] counts = new AtomicInteger[10][2];
for (int i = 0; i < 10; i++)
for (int j = 0; j < 2; j++)
counts[i][j] = new AtomicInteger(0);
Thread[] threads = new Thread[1000];
for (int i = 0; i < 10... 阅读全帖 |
|
l**********r
发帖数: 4612 | 13 【 以下文字转载自 JobHunting 讨论区 】
发信人: tarotaro2 (taro), 信区: JobHunting
标 题: 上个Yahoo电面面经, 给恶心坏了。。
发信站: BBS 未名空间站 (Thu Sep 12 14:33:48 2013, 美东)
一老印，电面迟到15分钟，打过来也不花两分钟介绍一下team之类的，直接上题。。
1) Can you explain dependency injection with an example, in java.
我一下子懵了，听都没听说过这个东西，什么也扯不出来，只好老实承认没听说过。。
事后google了一下，好像是Spring framework里面的一个概念。。
2) Can you create memory leak with a sample program.
也是完全没准备过，想了两分钟想不出什么来，老印直接开始问下题
3) What do you think is the output of this sample program
public class MyThread implements ... 阅读全帖 |
|
l*****e
发帖数: 3343 | 14 dim myRng as range
range("A1").select
dim myStr as string
For i=1 to 3
set myrng=activecell.offset(4,3*I-2)
myStr="=" & myrng.address
With cells(1,3*i-1).Validation
.Delete
.Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _
xlBetween, Formula1:=myStr
End With
Next I |
|
x*******j
发帖数: 17 | 15 我的答案：用c#的，文不对题。
string mystring ="xxmxxmxmxxxxxxmxxmxxmx%";
// char [] a= new char [3]{'a','a','a'};
//char [] b= new char [3]{'b','b','b'};
//char aa = 'a';
int i=0;
int aflag = 0;
int bflag1 = 0;
int bflag2 = 0;
while (mystring[i] != '%')
{
Console.WriteLine("the string char is :{0}",mystring[i]);
i |
|
b******a
发帖数: 215 | 16 嵌入式系统的CPU，对aligment要求很严。编译器是gcc。
函数要求传入一个(void *str)进去，然后函数里面会每2个byte读到一个local的变量
里面。
现在的问题是如果设一个变量如： char *mystr="this is my str"; 然后把mystr传入
函数，有时间mystr不是按照2或者4来对齐的，这样函数内部就会出错，导致系统崩溃。
因为一般情况下，char是没法对齐的。请问gcc下面有没有什么编译选项可以强制每个
变量都是按照 2或者4来对齐的？程序要求不能用pragma之类的语句来对齐。
谢谢了。 |
|
a****l
发帖数: 8211 | 17 有一个字符串,要在尾巴上加一个ascii码为13(dec)的字符,该怎么写??
Dim MyStr(10) As String
MyStr = "abcd"
现在要把MyStr变成abcd(ascii 13的字符)
应该是很简单的吧?新手不懂,谢谢指教! |
|
c**********e
发帖数: 2007 | 18 【 以下文字转载自 Programming 讨论区 】
发信人: careerchange (Stupid), 信区: Programming
标 题: How to convert string to string array (or vector)
发信站: BBS 未名空间站 (Mon Sep 13 19:18:21 2010, 美东)
It looks that`in Java, there is a function Split which convert a string to a
string array. I wonder if we could do the same in C++. How to do the
conversion?
string MyString = "value1;value2;value3;value4;"
string[] MyStringArray = MyString.Split(';');
MyStringArray[0] (would give value1)
MyStringArray[1] (would give value2) |
|
l*****a
发帖数: 14598 | 19 你为什么要保留没有意义的code?
btw, if u really want to keep them,
I suggest u just keep
MyStr(const MyStr& original) : size(original.size) |
|
l*********8
发帖数: 4642 | 20 MyStr(const MyStr& original)
{
if(original.data == NULL) {
data = NULL;
size = 0;
return;
}
data = new char[original.size+1];
memcpy(data, original.data, original.size);
data[original.size] = '\0';
size = original.size;
} |
|
x*******9
发帖数: 138 | 21 这题如果允许特殊分割符的话，非常简单。
serialize:
mystr = '\1'.join(str_list)
deserialize:
mystr.split('\1')
如果不允许的话，可以使用protobuf那种varient integer的方式。也可以用一个固定
长度的“字段”存字符串大小。
这题感觉没啥意思，算是考察知识广度？ |
|
h*****n
发帖数: 439 | 22 Dim MyString, LeftString, OutputString
.
.
.
LeftString = Left ( MyString, 10 )
OutputString = LeftString & "..." |
|
T*****e
发帖数: 361 | 23 myString.split("\\sd", 2);
or myString.split("\\\\sd", 2) if your '\sd' is not a pattern. |
|
b***i
发帖数: 3043 | 24 我有一个类叫storage,其中有个数组string ok[100];
还有个acquirereference(int a)想返回ok[a]的引用，比如我在主程序中
storage m;
string& mystring=m.acquirereference(10);
mystring="ok";
可以让ok[10]获得"ok"。 应该怎样写呢？ |
|
a****i
发帖数: 1182 | 25 try
public class Storage {
String[] ok;
public set(int index, String value) {
ok[index] = value;
}
}
class Main {
public static void main (String[] args) {
Storeage m = new Storeage();
String mystring = "ok";
m.set(10, mystring);
}
}
there is no way to get the reference and assign it.
String objects are immutable. |
|
o******r
发帖数: 259 | 26 Sorry,记错了,
当需要access两个class的 private data时用friend function.
另外,当操作符左边是class object的时候, 才会调用class member,
否则用friend function,
比如2个String相加,
String myStr;
"abcd" + myStr 最好定义friend function |
|
c**********e
发帖数: 2007 | 27 It looks that`in Java, there is a function Split which convert a string to a
string array. I wonder if we could do the same in C++. How to do the
conversion?
string MyString = "value1;value2;value3;value4;"
string[] MyStringArray = MyString.Split(';');
MyStringArray[0] (would give value1)
MyStringArray[1] (would give value2)
etc...... |
|
s*****w
发帖数: 1527 | 28 hi, i have a char array like this,
char array[0]='a', array[1]='b', array[2]='c';
string myStr = array.ToString();
myStr is not "abc", why ? |
|
c*****t
发帖数: 1879 | 29 Mine lists filenames containing mystr.
Yours lists files in which the contents contain mystr.
Actually, ls -1 is completely unnecessary since * is
all one needs. |
|
R*********i
发帖数: 7643 | 30 A not-so-straightforward but working solution in SAS:
data test;
mystr='abcdef ghijklnopaijeiajig aeioajgeojgajipa aweg rrr eagaggeagg
awgae gawegwgaaag aewh aawgah';
newstr=compress(mystr);
l=length(newstr);
output;
run;
proc sql;
select left(put(ceil(l/10),4.)) into :len from test;
quit;
data test2;
length newvar1 - newvar&len $10;
set test;
array newvar [*] $ newvar1 - newvar&len;
do i=1 to dim(newvar);
newvar[i]=substr(newstr,1+10*(i-1),10);
end;
drop i newstr;
run... 阅读全帖 |
|
f********t
发帖数: 6999 | 31 【 以下文字转载自 JobHunting 讨论区 】
发信人: winetricks (winetricks), 信区: JobHunting
发信站: BBS 未名空间站 (Sat Mar 22 10:46:35 2014, 美东)
http://www.ibm.com/developerworks/cn/aix/library/1307_lisl_c11/
以一个简单的 string 类为示例，实现拷贝构造函数和拷贝赋值操作符。
示例程序 :
class MyString {
private:
char* _data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len+1];
memcpy(_data, s, _len);
_data[_len] = ' |
|
c*****e
发帖数: 737 | 32 假设你可以使用一个MyDateTime类，有如下方法：
static MyDateTime now ()
MyDateTime & decrementHour (const rwint64 h)
MyDateTime & decrementMinute (const rwint64 m)
MyDateTime & decrementSecond (const rwint64 s)
MyString& getDate() |
|
l******d
发帖数: 530 | 33 p, origin.data是不是都要检测null？MyStr的成员定义有没有列出来？ |
|
s*******u
发帖数: 220 | 34 java刚上手，看cc150有些迷糊：
1.5
line 9： mystr += last + "" + count; 这里为啥要插入“”？
1.8
isSubstring解法感觉有点想必要非充分，不是很可信，不知道可靠否。 |
|
u****0
发帖数: 155 | 35 last和count都是int嗎？如果是的話，不加""，會先算last+count，再加到mystr後面
。 |
|
|
f****4
发帖数: 1359 | 37 原标题是C++11 标准新特性: 右值引用与转移语义
我的理解是这个MyString只是用来示例用的。
要是把_init_data里面_data delete掉，用了右值引用与转移_data应该是undefined/
invalid状态 |
|
f********t
发帖数: 6999 | 38 【 以下文字转载自 Military 讨论区 】
发信人: fuckthrust (...), 信区: Military
标 题: IBM高级软件工程师老印的示例代码，大家看看有多少个bug？ (转载)
发信站: BBS 未名空间站 (Sat Mar 22 22:58:24 2014, 美东)
发信人: winetricks (winetricks), 信区: JobHunting
发信站: BBS 未名空间站 (Sat Mar 22 10:46:35 2014, 美东)
http://www.ibm.com/developerworks/cn/aix/library/1307_lisl_c11/
以一个简单的 string 类为示例，实现拷贝构造函数和拷贝赋值操作符。
示例程序 :
class MyString {
private:
char* _data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len+1];
memcpy(_data, s, _len);
... 阅读全帖 |
|
f********t
发帖数: 6999 | 39 【 以下文字转载自 Military 讨论区 】
发信人: fuckthrust (...), 信区: Military
标 题: IBM高级软件工程师老印的示例代码，大家看看有多少个bug？ (转载)
发信站: BBS 未名空间站 (Sat Mar 22 22:58:24 2014, 美东)
发信人: winetricks (winetricks), 信区: JobHunting
发信站: BBS 未名空间站 (Sat Mar 22 10:46:35 2014, 美东)
http://www.ibm.com/developerworks/cn/aix/library/1307_lisl_c11/
以一个简单的 string 类为示例，实现拷贝构造函数和拷贝赋值操作符。
示例程序 :
class MyString {
private:
char* _data;
size_t _len;
void _init_data(const char *s) {
_data = new char[_len+1];
memcpy(_data, s, _len);
... 阅读全帖 |
|
l*****e
发帖数: 3343 | 40 should be:
myStr="=" & Range(myRng, myRng.end(xldown)).address |
|
t****t
发帖数: 6806 | 41 mystr &= chr(13)
PS: VB is stupid |
|
a***y
发帖数: 2803 | 42 echo preg_replace("/^([Cc][Hh][Ii][Nn][Aa])$/","$1",$mystring);
可以显示替换后的string. |
|
d*******3
发帖数: 6550 | 43 很简单啊，
echo preg_replace("/^(.*)(china)(.*)$/i","$1$2$3",$mystring);
同一个单词不区分大小写匹配就行了，如果是变量就把china 换成变量就可以了 |
|
b*******s
发帖数: 5216 | 44 【 以下文字转载自 Joke 讨论区 】
发信人: fuckthrust (...), 信区: Joke
标 题: IBM高级软件工程师老印的示例代码，大家看看有多少个bug？ (转载 (转载)
发信站: BBS 未名空间站 (Sat Mar 22 22:59:37 2014, 美东)
发信人: fuckthrust (...), 信区: Military
标 题: IBM高级软件工程师老印的示例代码，大家看看有多少个bug？ (转载)
发信站: BBS 未名空间站 (Sat Mar 22 22:58:24 2014, 美东)
发信人: winetricks (winetricks), 信区: JobHunting
发信站: BBS 未名空间站 (Sat Mar 22 10:46:35 2014, 美东)
http://www.ibm.com/developerworks/cn/aix/library/1307_lisl_c11/
以一个简单的 string 类为示例，实现拷贝构造函数和拷贝赋值操作符。
示例程序 :
class MyString {
private:
char... 阅读全帖 |
|
F***Q
发帖数: 6599 | 45 I got it,thx
but I still wonder how can I get the purpose by using ls as
ls -1 | grep mystr
which can list all of the files, then, how to delete them?
only can find exec another command? |
|
c*****t
发帖数: 1879 | 46 1. find could do the job as well :) Mastering find is invaluable.
2. Learn to use backquote.
rm `ls -1 | grep mystr` |
|
t*********l
发帖数: 30 | 47 I think this won't work. should be
rm `ls -1 | xargs grep -l mystr` |
|
m*****e
发帖数: 4193 | 48
You don't want to do that. Try to think simple:
rm -f *mystr* |
|
