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How to pass objects to functions in C++?
...eters are best expressed as a std::optional (boost::optional for older std libs), and aliasing is done fine by reference.
C++11's move semantics make passing and returning by value much more attractive even for complex objects.
Rules of thumb for C++03:
Pass arguments by const reference, except whe...
What is the difference D3 datum vs. data?
...: 2px solid #42e4e4;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/5.6.0/d3.min.js"></script>
<div style="margin-bottom: 20px;">
<span class="l l-a"></span> .datum() <br />
<span class="l l-b"></span> .data()
</div>
&l...
AngularJS : Where to use promises?
...
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.1.5/angular.js"></script>
<script src="app.js"></script>
</head>
<body ng-app="myModule" ng-controller="HelloCtrl">
<h1>Messages</h1>
<ul>
...
How to check if two arrays are equal with JavaScript? [duplicate]
...jQuery does not have a method for comparing arrays. However the Underscore library (or the comparable Lodash library) does have such a method: isEqual, and it can handle a variety of other cases (like object literals) as well. To stick to the provided example:
var a=[1,2,3];
var b=[3,2,1];
var c=ne...
How do you sign a Certificate Signing Request with your Certification Authority?
...s above are taken from a more complex openssl.cnf (you can find it in /usr/lib/openssl.cnf), but I think they are the essentials for creating the CA certificate and private key.
Tweak the fields above to suit your taste. The defaults save you the time from entering the same information while experi...
Is it possible to print a variable's type in standard C++?
...t;
#endif
#include <memory>
#include <string>
#include <cstdlib>
template <class T>
std::string
type_name()
{
typedef typename std::remove_reference<T>::type TR;
std::unique_ptr<char, void(*)(void*)> own
(
#ifndef _MSC_VER
abi::...
Asserting successive calls to a mock method
...ssert_has_calls(calls, any_order=True)
Source: https://docs.python.org/3/library/unittest.mock.html#unittest.mock.Mock.assert_has_calls
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How to deal with SettingWithCopyWarning in Pandas?
... the warning, but the operation will work.
df2 = df[['A']]
df2['A'] /= 2
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/IPython/__main__.py:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame.
Try using .loc[row_indexer,col_in...
How to prevent a dialog from closing when a button is clicked
...ll.
If you find some problems please comment here.
package com.droidahead.lib.utils;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.View;
import android.view.View.OnClickListener;
public class CustomAlertDialogBuilder ex...
How do I integrate Ajax with Django applications?
...g with csrf_token and submit button. Note that we have included the jquery library.
<form id = "contactForm" method= "POST">{% csrf_token %}
{{ contactForm.as_p }}
<input type="submit" name="contact-submit" class="btn btn-primary" />
</form>
<script src="https://cdnjs.clo...