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Iterate keys in a C++ map
...e <iostream>
#include <map>
int main()
{
std::map<std::string, int> myMap;
myMap["one"] = 1;
myMap["two"] = 2;
myMap["three"] = 3;
for ( const auto &myPair : myMap ) {
std::cout << myPair.first << "\n";
}
}
...
Why use multiple columns as primary keys (composite primary key)
...going to, in general, perform more poorly than a surrogate key'. Often an extra query is required to get the surrogate key of a relationship when you consider it. At which point it's a full extra round trip slower performance wise.
– ttugates
Apr 19 '19 at 20...
Inversion of Control vs Dependency Injection
...ode will look as below:
public class SMSService
{
public void SendSMS(string mobileNumber, string body)
{
SendSMSUsingGateway(mobileNumber, body);
}
private void SendSMSUsingGateway(string mobileNumber, string body)
{
/*implementation for sending SMS using gatew...
Check if a JavaScript string is a URL
Is there a way in JavaScript to check if a string is a URL?
32 Answers
32
...
Sending HTML email using Python
...ddress, recipient's address
# and message to send - here it is sent as one string.
s.sendmail(me, you, msg.as_string())
s.quit()
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How to get a complete list of object's methods and attributes?
...>> dir__(pyrenderdoc) Traceback (most recent call last): File "<string>", line 1, in <module> NameError: name '__dir' is not defined
– Mona Jalal
Dec 30 '16 at 1:28
...
What's the “big idea” behind compojure routes?
...ate to a proper response map; Compojure provides sane default handling for strings (as seen above) and a number of other object types; see the compojure.response/render multimethod for details (the code is entirely self-documenting here).
Let's try using defroutes now:
(defroutes example-routes
...
How to retrieve a module's path?
...(__file__) can also be tricky. At least on my system, it returns an empty string if you call it from the same directory as the file. ex.
# foo.py
import os
print '__file__ is:', __file__
print 'os.path.dirname(__file__) is:', os.path.dirname(__file__)
will output:
__file__ is: foo.py
os.path.d...
How to download a file from a URL in C#?
...
Use System.Net.WebClient.DownloadFile:
string remoteUri = "http://www.contoso.com/library/homepage/images/";
string fileName = "ms-banner.gif", myStringWebResource = null;
// Create a new WebClient instance.
using (WebClient myWebClient = new WebClient())
{
m...
What is the difference between a framework and a library?
...versions of the library. It can contain extra resources (images, localized strings, XML data files, UI objects, etc.) and unless the framework is released to public, it usually contains the necessary .h files you need to use the library.
Thus you have everything within a single package you need to...