difference between == and === in javascript
0 == false // true
0 === false // false, because they are of a different type
1 == "1" // true, automatic type conversion for value only
1 === "1" // false, because they are of a different type
null == undefined // true
null === undefined // false
'0' == false // true
'0' === false // falseRuby difference between for and .each
# They are both similar in function, however the for loop will retain a variable.
# FOR Example:
nums = [1,2,3]
for n in nums
puts n
end
=> 1 2 3
# If you ask what is n, n outputs the last assignment from the function.
n => 3
# EACH Example:
nums.each do |i|
puts i
end
=> 1 2 3
# If you ask what is i.
i => NameError (undefined local variable or method `i' for main:Object)diff between / and // in python
#this operator(//) return the quotien of the division , specifically the int quotein
print(5//2)
# 2
#this operator(/) return us the exact solution no matter if its float type or anything
print(5/2)
# 2.5difference between / and // in python
print(7/3)# this will lead to be a decimal answer
print(7//3) #This will lead to be a int number because using // I requeted
#python to remove decimal number from the calculated resuly if it hasdifference between % and // in python
# The true div operator (//) return the quotien of a division
print(5 // 2)
# 2
# The modulo operator (%) returns the reminder of a division
print(5 % 1)
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