@ -1,6 +1,6 @@
{% extends "base.html" %}
{% block content %}< div class = "row" style = "height:calc(100vh - 5.875rem);overflow:hidden" > < input id = "doc-drawer-checkbox" class = "drawer" value = "on" type = "checkbox" > < nav class = "col-md-4 col-lg-3" style = "border-top:0" > < div class = "group" > < input class = "search" id = "searchInput" onkeyup = "search(this)" type = "text" > < label id = "search-label" > Search for snippet...< / label > < / div > < label for = "doc-drawer-checkbox" class = "button drawer-close" > < / label > < h3 style = "" > Math< / h3 > < a class = "sublink-1" tags = "math" href = "#average" style = "" > average< / a > < a class = "sublink-1" tags = "math" href = "#factorial" style = "" > factorial< / a > < a class = "sublink-1" tags = "math" href = "#gcd" style = "" > gcd< / a > < a class = "sublink-1" tags = "math" href = "#lcm" style = "" > lcm< / a > < a class = "sublink-1" tags = "math" href = "#max_n" style = "" > max_n< / a > < a class = "sublink-1" tags = "math" href = "#min_n" style = "" > min_n< / a > < h3 style = "" > List< / h3 > < a class = "sublink-1" tags = "list" href = "#chunk" style = "" > chunk< / a > < a class = "sublink-1" tags = "list" href = "#compact" style = "" > compact< / a > < a class = "sublink-1" tags = "list" href = "#count_occurences" style = "" > count_occurences< / a > < a class = "sublink-1" tags = "list" href = "#deep_flatten" style = "" > deep_flatten< / a > < a class = "sublink-1" tags = "list" href = "#difference" style = "" > difference< / a > < a class = "sublink-1" tags = "list" href = "#shuffle" style = "" > shuffle< / a > < a class = "sublink-1" tags = "list" href = "#spread" style = "" > spread< / a > < a class = "sublink-1" tags = "list" href = "#zip" style = "" > zip< / a > < a class = "sublink-1" tags = "list" href = "#count_by" style = "" > count_by< / a > < a class = "sublink-1" tags = "list" href = "#difference_by" style = "" > difference_by< / a > < a class = "sublink-1" tags = "list" href = "#insertion_sort" style = "" > insertion_sort< / a > < h3 style = "" > String< / h3 > < a class = "sublink-1" tags = "string" href = "#count_vowels" style = "" > count_vowels< / a > < a class = "sublink-1" tags = "string" href = "#byte_size" style = "" > byte_size< / a > < a class = "sublink-1" tags = "string" href = "#capitalize" style = "" > capitalize< / a > < a class = "sublink-1" tags = "string" href = "#capitalize_every_word" style = "" > capitalize_every_word< / a > < a class = "sublink-1" tags = "string" href = "#decapitalize" style = "" > decapitalize< / a > < a class = "sublink-1" tags = "string" href = "#palindrome" style = "" > palindrome< / a > < a class = "sublink-1" tags = "string" href = "#is_upper_case" style = "" > is_upper_case< / a > < a class = "sublink-1" tags = "string" href = "#is_lower_case" style = "" > is_lower_case< / a > < / nav > < main class = "col-sm-12 col-md-8 col-lg-9" style = "height:100%;overflow-y:auto;background:#eceef2;padding:0" > < a id = "top" > < / a > < h2 style = "text-align:center" > Math< / h2 > < div class = "card fluid" > < h3 id = "average" class = "section double-padded" > average< / h3 > <!-- <form action="" method="post"><button type="submit" value="average" name="submit">Vote</button></form><p></p> --> < div class = "section double-padded" >
{% block content %}< div class = "row" style = "height:calc(100vh - 5.875rem);overflow:hidden" > < input id = "doc-drawer-checkbox" class = "drawer" value = "on" type = "checkbox" > < nav class = "col-md-4 col-lg-3" style = "border-top:0" > < div class = "group" > < input class = "search" id = "searchInput" onkeyup = "search(this)" type = "text" > < label id = "search-label" > Search for snippet...< / label > < / div > < label for = "doc-drawer-checkbox" class = "button drawer-close" > < / label > < h3 style = "" > Math< / h3 > < a class = "sublink-1" tags = "math" href = "#average" style = "" > average< / a > < a class = "sublink-1" tags = "math" href = "#factorial" style = "" > factorial< / a > < a class = "sublink-1" tags = "math" href = "#gcd" style = "" > gcd< / a > < a class = "sublink-1" tags = "math" href = "#lcm" style = "" > lcm< / a > < a class = "sublink-1" tags = "math" href = "#max_n" style = "" > max_n< / a > < a class = "sublink-1" tags = "math" href = "#min_n" style = "" > min_n< / a > < h3 style = "" > List< / h3 > < a class = "sublink-1" tags = "list" href = "#chunk" style = "" > chunk< / a > < a class = "sublink-1" tags = "list" href = "#compact" style = "" > compact< / a > < a class = "sublink-1" tags = "list" href = "#count_occurences" style = "" > count_occurences< / a > < a class = "sublink-1" tags = "list" href = "#deep_flatten" style = "" > deep_flatten< / a > < a class = "sublink-1" tags = "list" href = "#difference" style = "" > difference< / a > < a class = "sublink-1" tags = "list" href = "#shuffle" style = "" > shuffle< / a > < a class = "sublink-1" tags = "list" href = "#spread" style = "" > spread< / a > < a class = "sublink-1" tags = "list" href = "#zip" style = "" > zip< / a > < a class = "sublink-1" tags = "list" href = "#count_by" style = "" > count_by< / a > < a class = "sublink-1" tags = "list" href = "#difference_by" style = "" > difference_by< / a > < a class = "sublink-1" tags = "list" href = "#insertion_sort" style = "" > insertion_sort< / a > < h3 style = "" > String< / h3 > < a class = "sublink-1" tags = "string" href = "#count_vowels" style = "" > count_vowels< / a > < a class = "sublink-1" tags = "string" href = "#byte_size" style = "" > byte_size< / a > < a class = "sublink-1" tags = "string" href = "#capitalize" style = "" > capitalize< / a > < a class = "sublink-1" tags = "string" href = "#capitalize_every_word" style = "" > capitalize_every_word< / a > < a class = "sublink-1" tags = "string" href = "#decapitalize" style = "" > decapitalize< / a > < a class = "sublink-1" tags = "string" href = "#palindrome" style = "" > palindrome< / a > < a class = "sublink-1" tags = "string" href = "#is_upper_case" style = "" > is_upper_case< / a > < a class = "sublink-1" tags = "string" href = "#is_lower_case" style = "" > is_lower_case< / a > < h3 style = "" > list< / h3 > < a class = "sublink-1" tags = " list" href = "#bubble_sort" style = "" > bubble_sort< / a > < / nav > < main class = "col-sm-12 col-md-8 col-lg-9" style = "height:100%;overflow-y:auto;background:#eceef2;padding:0" > < a id = "top" > < / a > < h2 style = "text-align:center" > Math< / h2 > < div class = "card fluid" > < h3 id = "average" class = "section double-padded" > average< / h3 > <!-- <form action="" method="post"><button type="submit" value="average" name="submit">Vote</button></form><p></p> --> < div class = "section double-padded" >
< p > < emoji > ℹ < / emoji > Already implemented via < code > statistics.mean< / code > . < code > statistics.mean< / code > takes an array as an argument whereas this function takes variadic arguments.< / p >
< p > Returns the average of two or more numbers.< / p >
< p > Takes the sum of all the < code > args< / code > and divides it by < code > len(args)< / code > . The second argument < code > 0.0< / code > in sum is to handle floating point division in < code > python2< / code > .< / p >
@ -99,8 +99,7 @@ lcm([1, 3, 4], 5) # 60</pre>
def max_n(arr, n=1):
numbers = deepcopy(arr)
numbers.sort()
numbers.reverse()
numbers.sort(reverse=True )
return numbers[:n]< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > max_n([1, 2, 3]) # [3]
@ -143,7 +142,7 @@ def chunk(arr, size):
< p > Use < code > filter()< / code > to filter out falsey values (False, None, 0, and "").< / p >
< pre class = "language-python" > def compact(arr):
return list(filter(lambda x: bool(x) , arr))< / pre >
return list(filter(bool, arr))< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > compact([0, 1, False, 2, '', 3, 'a', 's', 34]) # [ 1, 2, 3, 'a', 's', 34 ]< / pre >
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
@ -151,15 +150,10 @@ def chunk(arr, size):
< / div > < div class = "card fluid" > < h3 id = "count_occurences" class = "section double-padded" > count_occurences< / h3 > <!-- <form action="" method="post"><button type="submit" value="count_occurences" name="submit">Vote</button></form><p></p> --> < div class = "section double-padded" >
< p > < emoji > ℹ < / emoji > Already implemented via < code > list.count()< / code > .< / p >
< p > Counts the occurrences of a value in an list.< / p >
< p > Uses the < code > reduce< / code > functin from built-in module < code > functools< / code > < / p >
< p > Uses the list comprehension to increment a counter each time you encounter the specific value inside the list.< / p >
< pre class = "language-python" > from functools import reduce
def count_occurences(arr, val):
return reduce(
(lambda x, y: x + 1 if y == val and type(y) == type(val) else x + 0),
arr)< / pre >
< pre class = "language-python" > def count_occurrences(lst, val):
return len([x for x in lst if x == val and type(x) == type(val)])< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > count_occurrences([1, 1, 2, 1, 2, 3], 1) # 3< / pre >
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
@ -188,11 +182,10 @@ def deep_flatten(arr):
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
< / div > < div class = "card fluid" > < h3 id = "difference" class = "section double-padded" > difference< / h3 > <!-- <form action="" method="post"><button type="submit" value="difference" name="submit">Vote</button></form><p></p> --> < div class = "section double-padded" >
< p > Returns the difference between two array s.< / p >
< p > Create a < code > set< / code > from < code > b< / code > , then u se list comprehension to only keep values not contained in < code > b< / code > < / p >
< p > Returns the difference between two iterable s.< / p >
< p > U se list comprehension to only keep values not contained in < code > b< / code > < / p >
< pre class = "language-python" > def difference(a, b):
b = set(b)
return [item for item in a if item not in b]< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > difference([1, 2, 3], [1, 2, 4]) # [3]< / pre >
@ -323,7 +316,7 @@ count_vowels('gym') # 0</pre>
< pre class = "language-python" > def byte_size(string):
return(len(string.encode('utf-8')))< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > byte_size('😀 ') # 4
< pre class = "language-python" > byte_size('😀 ') # 4
byte_size('Hello World') # 11< / pre >
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
@ -375,8 +368,8 @@ decapitalize('FooBar', True) # 'fOOBAR'</pre>
< p > Checks if a string is upper case.< / p >
< p > Convert the given string to upper case, using < code > str.upper()< / code > method and compare it to the original.< / p >
< pre class = "language-python" > def is_upper_case(str):
return str == str.upper()< / pre >
< pre class = "language-python" > def is_upper_case(string ):
return string == string .upper()< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > is_upper_case('ABC') # True
is_upper_case('a3@$') # True
@ -387,14 +380,30 @@ is_upper_case('aB4') # False</pre>
< p > Checks if a string is lower case.< / p >
< p > Convert the given string to lower case, using < code > str.lower()< / code > method and compare it to the original.< / p >
< pre class = "language-python" > def is_lower_case(str):
return str == str.lower()< / pre >
< pre class = "language-python" > def is_lower_case(string ):
return string == string .lower()< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > is_lower_case('abc') # True
is_lower_case('a3@$') # True
is_lower_case('Ab4') # False< / pre >
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
< / div > < h2 style = "text-align:center" > list< / h2 > < div class = "card fluid" > < h3 id = "bubble_sort" class = "section double-padded" > bubble_sort< / h3 > <!-- <form action="" method="post"><button type="submit" value="bubble_sort" name="submit">Vote</button></form><p></p> --> < div class = "section double-padded" >
< p > Bubble_sort uses the technique of comparing and swapping< / p >
< pre class = "language-python" > def bubble_sort(arr):
for passnum in range(len(arr) - 1, 0, -1):
for i in range(passnum):
if arr[i] > arr[i + 1]:
temp = arr[i]
arr[i] = arr[i + 1]
arr[i + 1] = temp< / pre >
< label class = "collapse" > Show examples< / label >
< pre class = "language-python" > arr = [54,26,93,17,77,31,44,55,20]
bubble_sort(arr)
print("sorted %s" %arr) # [17,20,26,31,44,54,55,77,91]< / pre >
< button class = "primary clipboard-copy" > 📋 Copy to clipboard< / button > < / div >
< / div > < button class = "scroll-to-top" > ↑< / button >
< footer > < p style = "display:inline-block" > < strong > 30 seconds of python code< / strong > is licensed under the < a href = "https://github.com/kriadmin/30-seconds-of-python-code/blob/master/LICENSE" > GPL-3.0< / a > license.< br > Icons made by < a href = "https://www.flaticon.com/authors/smashicons" > Smashicons< / a > from < a href = "https://www.flaticon.com/" > www.flaticon.com< / a > is licensed by < a href = "http://creativecommons.org/licenses/by/3.0/" > CC 3.0 BY< / a > .< br > Ribbon made by < a href = "https://github.com/tholman/github-corners" > Tim Holman< / a > is licensed by < a href = "https://opensource.org/licenses/MIT" > The MIT License< / a > < br > Built with the < a href = "https://minicss.org" > mini.css framework< / a > .< / p > < / footer >
< / main > < / div > {% endblock %}
Rohit Tanwar