Programming Articles - Page 3260 of 3366

A string contains two integers separated by comma. It is first split in a list of two strings having digits.>>> s="1,2".split(",") >>> s ['1', '2']Two items are then converted to integers and used as arguments for complex() function>>> complex(int(s[0]), int(s[1])) (1+2j)This results in unpacking of string of integers in a complex number

Easiest way is to employ two nested for loops. Outer loop fetches each tuple and inner loop traverses each item from the tuple. Inner print() function end=’ ‘ to print all items in a tuple in one line. Another print() introduces new line after each tuple.ExampleL=[(1,2,3), (4,5,6), (7,8,9,10)] for x in L:   for y in x:     print(y, end=' ')   print()Output1 2 3 4 5 6 7 8 9 10

There are different ways to iterate through a tuple object. The for statement in Python has a variant which traverses a tuple till it is exhausted. It is equivalent to foreach statement in Java. Its syntax is −for var in tuple: stmt1 stmt2ExampleFollowing script will print all items in the listT = (10, 20, 30, 40, 50) for var in T: print (T.index(var), var)OutputThe output generated is −0 10 1 20 2 30 3 40 4 50Another approach is to iterate over range upto length of tuple, and use it as index of item in tupleExamplefor var in range(len(T)):   ... Read More

List is an ordered sequence of elements. Individual element in list is accessed using index starting with 0 and goes up to length-1. If index goes beyond this range, IndexError exception is encountered.In following example, an infinite loop is used to pop one element at a time. As loop tries to go even after last element is popped, IndexError exception will be encountered. We trap it using try – except mechanism.a=[1,2,3] while True:   try:     b=a.pop()     print (b)   except (IndexError):     break

You can employ a nested loop to count number of elements in each sublist of a list>>> a=[[1, 2, 3], [4, 5, 6]] >>> c=0 >>> for x in a:       for y in x:       c=c+1 >>> c 6

JavaScript CookiesUsing JavaScript cookies is the most efficient method of remembering and tracking preferences, purchases, commissions, and other information required for better visitor experience or site statistics.PHP CookiesCookies are text files stored on the client computer and they are kept for tracking purpose. PHP transparently supports HTTP cookies.How JavaScript cookies work?Your server sends some data to the visitor's browser in the form of a cookie. The browser may accept the cookie. If it does, it is stored as a plain text record on the visitor's hard drive. Now, when the visitor arrives at another page on your site, the browser ... Read More

We can compare given strings using the following codeExampleimport re s1 = 'Pink Forest' s2 = 'Pink Forrest' if bool(re.search(s1,s2))==True:    print 'Strings match' else:    print 'Strings do not match'OutputThis gives the outputStrings do not match

In this article, we will explain nested/inner functions in Python and how they work with examples. Nested (or inner) functions are functions defined within other functions that allow us to directly access the variables and names defined in the enclosing function. Nested functions can be used to create closures and decorators, among other things. Defining an inner/nested Function Simply use the def keyword to initialize another function within a function to define a nested function. The following program is to demonstrate the inner function in Python − Example # creating an outer function def outerFunc(sample_text): sample_text ... Read More

Calling a JavaScript function directly from C++ depends on the environment and the system; for this, make sure you have embedded a JavaScript engine or integrated C++ with JavaScript. In this article, we will be using Emscripten (C++ to JavaScript in WebAssembly) to call a JavaScript function from C++. For this, you have to compile the C++ program to WebAssembly using Emscripten and then call JavaScript functions from C++. So, first, create the C++ file with the header . C++ File Let's consider that this file name is saved as main.cpp. #include // here declared an external JS ... Read More

The function datetime.now() takes tzinfo as keyword argument but datetime.today() does not take any keyword arguments. Quoting the docs −datetime.now() returns the current local date and time. If optional argument tz is None or not specified, this is like today(), but, if possible, supplies more precision than can be gotten from going through a time.time() timestamp (for example, this may be possible on platforms supplying the C gettimeofday() function).