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Why would I ever use push_back instead of emplace_back?
... constructors are supposed to be safe. If you can implicitly construct a U from a T, you are saying that U can hold all of the information in T with no loss. It is safe in pretty much any situation to pass a T and no one will mind if you make it a U instead. A good example of an implicit constructor...
Function for Factorial in Python
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Existing solution
The shortest and probably the fastest solution is:
from math import factorial
print factorial(1000)
Building your own
You can also build your own solution. Generally you have two approaches. The one that suits me best is:
from itertools import imap
def factorial(x):
r...
How to load an ImageView by URL in Android? [closed]
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From Android developer:
// show The Image in a ImageView
new DownloadImageTask((ImageView) findViewById(R.id.imageView1))
.execute("http://java.sogeti.nl/JavaBlog/wp-content/uploads/2009/04/android_icon_256.png")...
Parse JSON String into a Particular Object Prototype in JavaScript
...his.a*this.b;};
// IF AN OBJECT WAS PASSED THEN INITIALISE PROPERTIES FROM THAT OBJECT
for (var prop in obj) this[prop] = obj[prop];
}
var fooObj = new Foo();
alert(fooObj.test() ); //Prints 6
// INITIALISE A NEW FOO AND PASS THE PARSED JSON OBJECT TO IT
var fooJSON = new Foo(JSON.parse('...
What is the C runtime library?
..., on UNIX the floating point functions are traditionally stored separately from the rest). That big file is typically something on the same general order as a zip file, but without any compression, so it's basically just some little files collected together and stored together into one bigger file. ...
Compiling dynamic HTML strings from database
...ar called 'pageContent'. This var gets assigned dynamically generated HTML from a database. When the user flips to the next page, a called to the DB is made, and the pageContent var is set to this new HTML, which gets rendered onscreen through ng-bind-html-unsafe. Here's the code:
...
How to get current timestamp in string format in Java? “yyyy.MM.dd.HH.mm.ss”
... is ambiguous as to its exact meaning as it lacks any indication of offset-from-UTC or time zone.
ISO 8601
If you have any say in the matter, I suggest you consider using standard ISO 8601 formats rather than rolling your own. The standard format is quite similar to yours. For example:2016-02-20T03:...
How do I switch between the header and implementation file in Xcode 4?
...ng, instead of hitting the same key binding 3 times in a row to cycle back from file 2 to file 1.
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How do I pull from a Git repository through an HTTP proxy?
Note: while the use-case described is about using submodules within a project, the same applies to a normal git clone of a repository over HTTP.
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How to escape double quotes in JSON
... thread.
If you're making a .json text file/stream and importing the data from there then the main stream answer of just one backslash before the double quotes:\" is the one you're looking for.
However if you're like me and you're trying to get the w3schools.com "Tryit Editor" to have a double quo...