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How to solve the error LNK2019: unresolved external symbol - function?
...l but have not declared that class itself as import/export.
#ifdef MYDLL_EXPORTS
#define DLLEXPORT __declspec(dllexport)
#else
#define DLLEXPORT __declspec(dllimport)
#endif
class DLLEXPORT Book // <--- this class must also be declared as export/import
{
public:
Book();
...
Ruby on Rails - Import Data from a CSV file
...
require 'csv'
csv_text = File.read('...')
csv = CSV.parse(csv_text, :headers => true)
csv.each do |row|
Moulding.create!(row.to_hash)
end
share
|
...
How can I check if an ip is in a network in Python?
...otted quad string to long integer"
return struct.unpack('L',socket.inet_aton(ip))[0]
def networkMask(ip,bits):
"Convert a network address to a long integer"
return dottedQuadToNum(ip) & makeMask(bits)
def addressInNetwork(ip,net):
"Is an address in a network"
return ip &...
Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;
... I was already referencing. So this mysterious "multiple dex files define ____" appeared. Checking the Java Build Path and seeing this new item, and unchecking the originally-included support library solved the problem for me.
– Tom Pace
Sep 26 '13 at 17:20
...
How to see the changes between two commits without commits in-between?
...
For checking complete changes:
git diff <commit_Id_1> <commit_Id_2>
For checking only the changed/added/deleted files:
git diff <commit_Id_1> <commit_Id_2> --name-only
NOTE: For checking diff without commit in between, you don't need to put the...
What is lexical scope?
...ipt our choices for scoping are:
as-is (no scope adjustment)
lexical var _this = this; function callback(){ console.log(_this); }
bound callback.bind(this)
It's worth noting, I think, that JavaScript doesn't really have dynamic scoping. .bind adjusts the this keyword, and that's close, but not t...
PHP - Debugging Curl
...
You can enable the CURLOPT_VERBOSE option:
curl_setopt($curlhandle, CURLOPT_VERBOSE, true);
When CURLOPT_VERBOSE is set, output is written to STDERR or the file specified using CURLOPT_STDERR. The output is very informative.
You can also use tcpdu...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
...This worked for me too, except I exited out of everything, clicked on xampp_start in C:/xampp and then changed it to port 81. 8080 didn't work for me.
– user3553260
Oct 4 '16 at 20:41
...
registerForRemoteNotificationTypes: is not supported in iOS 8.0 and later
... Xcode 6, then you will need to use conditional compiling as follows:
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 80000
if ([application respondsToSelector:@selector(registerUserNotificationSettings:)]) {
// use registerUserNotificationSettings
} else {
// use registerForRemoteNotificationTyp...
Simpler way to create dictionary of separate variables?
...avoid duplication so that instead of print('x: ' + x) one could write magic_print(x) and have the same output without writing variable's name twice.
– Piotr Dobrogost
May 1 '13 at 10:46
...