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How to remove all the occurrences of a char in c++ string
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Basically, replace replaces a character with another and '' is not a character. What you're looking for is erase.
See this question which answers the same problem. In your case:
#include <algorithm>
str.erase(std::remove(str.begin(), str.end(), 'a...
How to check if a char is equal to an empty space?
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if (c == ' ')
char is a primitive data type, so it can be compared with ==.
Also, by using double quotes you create String constant (" "), while with single quotes it's a char constant (' ').
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PostgreSQL “DESCRIBE TABLE”
... 'table' or \ds 'sequence' and so on)
The SQL standard way, as shown here:
select column_name, data_type, character_maximum_length, column_default, is_nullable
from INFORMATION_SCHEMA.COLUMNS where table_name = '<name of table>';
It's supported by many db engines.
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
StringTokenizer ? Convert the String to a char[] and iterate over that? Something else?
15 Answers
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字符串指针变量与字符数组的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 设有定义字符型指针变量与字符数组的语句如下： char *pc ,str[100]; 则系统...使用字符串指针变量与字符数组的区别
（1）分配内存
设有定义字符型指针变量与字符数组的语句如下：
char *pc ,str[100];
则系...
SQL server query to get the list of columns in a table along with Data types, NOT NULL, and PRIMARY
...licate rows for some columns, use user_type_id instead of system_type_id.
SELECT
c.name 'Column Name',
t.Name 'Data type',
c.max_length 'Max Length',
c.precision ,
c.scale ,
c.is_nullable,
ISNULL(i.is_primary_key, 0) 'Primary Key'
FROM
sys.columns c
INNER JOIN
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How to convert an int to string in C?
...nvert your integer value to a string.
Here is an example:
int num = 321;
char snum[5];
// convert 123 to string [buf]
itoa(num, snum, 10);
// print our string
printf("%s\n", snum);
If you want to output your structure into a file there is no need to convert any value beforehand. You can just...
Convert a character digit to the corresponding integer in C
Is there a way to convert a character to an integer in C?
15 Answers
15
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Pointer expressions: *ptr++, *++ptr and ++*ptr
...ith your program, as it's the simplest to explain.
int main()
{
const char *p = "Hello";
while(*p++)
printf("%c",*p);
return 0;
}
The first statement:
const char* p = "Hello";
declares p as a pointer to char. When we say "pointer to a char", what does that mean? It means th...
Best way to serialize an NSData into a hexadeximal string
... string of NSData. Empty string if data is empty. */
const unsigned char *dataBuffer = (const unsigned char *)[self bytes];
if (!dataBuffer)
return [NSString string];
NSUInteger dataLength = [self length];
NSMutableString *hexString = [NSMutableString stri...