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Will using 'var' affect performance?
... answered Nov 18 '09 at 14:42
RichardODRichardOD
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Finding three elements in an array whose sum is closest to a given number
...We've found the answer.
The sum was too small. Move j closer to the end to select the next biggest number.
The sum was too big. Move k closer to the beginning to select the next smallest number.
For each i, the pointers of j and k will gradually get closer to each other. Eventually they will pass ...
Remove spaces from std::string in C++
...ed way to remove spaces from a string in C++? I could loop through all the characters and build a new string, but is there a better way?
...
Check if one IEnumerable contains all elements of another IEnumerable
... bool result;
//Get the value
var list1WithValue = list1.Select(s => s.Value).ToList();
var list2WithValue = list2.Select(s => s.Value).ToList();
result = !list1WithValue.Except(list2WithValue).Any();
return result;
}
...
How can I read and parse CSV files in C++?
...0E+09
The code is written as a finite-state machine and is consuming one character at a time. I think it's easier to reason about.
#include <istream>
#include <string>
#include <vector>
enum class CSVState {
UnquotedField,
QuotedField,
QuotedQuote
};
std::vector<...
string to string array conversion in java
...
Assuming you really want an array of single-character strings (not a char[] or Character[])
1. Using a regex:
public static String[] singleChars(String s) {
return s.split("(?!^)");
}
The zero width negative lookahead prevents the pattern matching at the start ...
How do I find where an exception was thrown in C++?
...rwrite sigaction with caller's address
array[1] = caller_address;
char ** messages = backtrace_symbols(array, size);
// skip first stack frame (points here)
for (int i = 1; i < size && messages != NULL; ++i) {
std::cerr << "[bt]: (" << i << ") "...
Remove the first character of a string
I would like to remove the first character of a string.
4 Answers
4
...
Replace multiple characters in one replace call
...str.replace(/#|_/g,''); // result: "this is a test"
You could also use a character class:
str.replace(/[#_]/g,'');
Fiddle
If you want to replace the hash with one thing and the underscore with another, then you will just have to chain. However, you could add a prototype:
String.prototype.allR...
What does it mean by buffer?
...ample. In a C program, for example, you might have:
#define BUFSIZE 1024
char buffer[BUFSIZE];
size_t len = ;
// ... later
while((len=read(STDIN, &buffer, BUFSIZE)) > 0)
write(STDOUT, buffer, len);
... which is a minimal version of cp(1). Here, the buffer array is used to store the ...