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Duplicate symbols for architecture x86_64 under Xcode
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In my case, I just created a header file to define constant strings like this:
NSString *const AppDescriptionString = @"Healthy is the best way to keep fit";
I solved this scenario by using static:
static NSString *const AppDescriptionString = @"Healthy is the best way to keep fit...
Why can't I make a vector of references?
...td::reference_wrapper like this:
#include <functional>
#include <string>
#inclu
How to create a file in memory for user to download, but not through server?
...vaScript uses UTF-16 internally. If you have a text or CSV file, start the string with '\ufeff', the Byte Order Mark for UTF-16BE, and text editors will be able to read non-ASCII characters correctly.
– larspars
Nov 19 '14 at 9:06
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Odd behavior when Java converts int to byte?
...e number as negative
public class castingsample{
public static void main(String args[]){
int i;
byte y;
i = 1024;
for(i = 1024; i > 0; i-- ){
y = (byte)i;
System.out.print(i + " mod 128 = " + i%128 + " also ");
System.out.println(i + " cast to byte " + " = " ...
Python logging: use milliseconds in time format
...me module and isn't handicapped like some other solutions is to use simple string replacement like so:
import logging
import time
class MyFormatter(logging.Formatter):
def formatTime(self, record, datefmt=None):
ct = self.converter(record.created)
if datefmt:
if "%F" in datefmt...
Delete column from SQLite table
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For SQLite3 c++ :
void GetTableColNames( tstring sTableName , std::vector<tstring> *pvsCols )
{
UASSERT(pvsCols);
CppSQLite3Table table1;
tstring sDML = StringOps::std_sprintf(_T("SELECT * FROM %s") , sTableName.c_str() );
table1 = getTable...
Best way to store a key=>value array in JavaScript?
....create(null) since ES5, but was seldomly done.
The keys of an Object are Strings and Symbols, where they can be any value for a Map.
You can get the size of a Map easily while you have to manually keep track of size for an Object.
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Facebook access token server-side validation for iPhone app
...ill return the Facebook User Id of the owner of the access token as a JSON string. The keyword 'me' represents the currently logged in user or the owner of the access token. For this request access token is a mandatory parameter.
If the provided access token is not valid or expired Facebook will j...
Ruby on Rails - Import Data from a CSV file
...indifferent_access or symbolize_keys, and no need to read in the file to a string first.
It doesnt't keep the whole file in memory at once, but reads in line by line and creates a Moulding per line.
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Functions that return a function
...can return a true/false value. An integer (1,2,3,4...). You can return a string. You can return a complex object with multiple properties. And you can return a function. a function is just a thing.
In your case, returning b returns the thing, the thing is a callable function. Returning b() re...