Applications Articles - Page 2

It is a common task to join an array of strings into a single string in programming. Here’s how you do it in Swift.

Swift 2

let array = ["Matthew", "John", "Paul", "Peter"]

let stringOfNames = array.joinedWithSeparator(", ")

Swift 3

let array = ["Matthew", "John", "Paul", "Peter"]

let stringOfNames = array.joined(separator: ", ")

Compute for the number of days between two dates

Description

=DAYS(end_date, start_date)

Parameters

• end_date – end date for computation
• start_date – start date for computation

Create a valid date from year, month, and day

Description

=DATE(year, month, day)

Parameters

• year – year to use when creating the date
• month – month to use when creating the date
• day – day to use when creating the date

Examples

Create date for August 8, 1982

=DATE(1982, 08, 21)

Create date for October 10, 2016

=DATE(2016, 10, 10)

Create date for April 21, 2000

=DATE(2000, 04, 21)

Create date for May 5, 1983

=DATE(1983, 05, 05)

Formula to compute for values if cells have values less than a specified amount

Formula

=SUMIF(range, expression)

Add the values in cells if the value is greater than 3000

=SUMIF(A1:A8,"<3000")

Add the values in cells if the value is greater than 1000

=SUMIF(A1:A8,"<1000")

Add the values in cells if the value is greater than 500

=SUMIF(A1:A8,"<500")

Formula Parameters

• Range – The first part of the formula lets you specify the range to add. This is specified like this, A1:A20
• Expression – The second part of the formula lets you specify the condition. The condition is in string form. You can use multiple logical operators like <, =, <=, >=

=SUMIF(A1:A8,"<=2000")

=SUMIF(A1:A8,">=2000")

=SUMIF(A1:A8,"=2000")