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What are transparent comparators?
...he example use-case from n3657 is locating an object in a std::set<std::string> using a string literal: with the C++11 definition a std::string object is constructed when passing a string literals to the corresponding member function. With the change it is possible to use the string literal di...
How to check if a string in Python is in ASCII?
I want to I check whether a string is in ASCII or not.
16 Answers
16
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What uses are there for “placement new”?
... on a
pre-allocated buffer takes less time):
char *buf = new char[sizeof(string)]; // pre-allocated buffer
string *p = new (buf) string("hi"); // placement new
string *q = new string("hi"); // ordinary heap allocation
You may also want to be sure there can be no allocation failure at ...
What should I do if two libraries provide a function with the same name generating a conflict?
...ding libraries in a hex editor and change all occurrences of the offending strings to something else. You should then be able to use the new names in all future calls.
UPDATE: I just did it on this end and it seems to work. Of course, I've not tested this thoroughly - it may be no more than a re...
Javascript and regex: split string and keep the separator
I have a string:
7 Answers
7
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UnicodeDecodeError, invalid continuation byte
...t’s just the mechanical cause of the exception. In this case, you have a string that is almost certainly encoded in latin 1. You can see how UTF-8 and latin 1 look different:
>>> u'\xe9'.encode('utf-8')
b'\xc3\xa9'
>>> u'\xe9'.encode('latin-1')
b'\xe9'
(Note, I'm using a mix o...
How does grep run so fast?
...lly amazed by the functionality of GREP in shell, earlier I used to use substring method in java but now I use GREP for it and it executes in a matter of seconds, it is blazingly faster than java code that I used to write.(according to my experience I might be wrong though)
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How to determine CPU and memory consumption from inside a process?
...used by current process:
#include "stdlib.h"
#include "stdio.h"
#include "string.h"
int parseLine(char* line){
// This assumes that a digit will be found and the line ends in " Kb".
int i = strlen(line);
const char* p = line;
while (*p <'0' || *p > '9') p++;
line[i-3] = '...
How to encrypt String in Java
What I need is to encrypt string which will show up in 2D barcode(PDF-417) so when someone get an idea to scan it will get nothing readable.
...
How to round an average to 2 decimal places in PostgreSQL?
...ec',1); -- 3.1 float!
SELECT round(2.8+1/3.,'dec'::text); -- need to cast string? pg bug
PS: checking \df round after overloadings, will show something like,
Schema | Name | Result data type | Argument data types
------------+-------+------------------+----------------------------
mysch...