Define a function then define it's 'type'
I've been asked to define a function getEmployees that maps each role into the set of names who have that role within a business. I need to define both the type and mapping of this function.
So say I have a few sets - {Checkout}, {Manager}, {Shelf Stacker}, and say I have one name in each, maybe {John Doe} intersects both {Checkout} and {Shelf Stacker}.
I'm just a bit confused with what is meant by type, I thought they may mean to write the function, map it, and state whether it's surjective, injective etc?
I've just been told "no that's not the case..but I'm not saying any more!"
Could someone please help me try to figure this out? Or point me in the right direction? I'm lost!
functions
asked Nov 29 at 19:49
CerKL
1
add a comment |
I've been asked to define a function getEmployees that maps each role into the set of names who have that role within a business. I need to define both the type and mapping of this function.
So say I have a few sets - {Checkout}, {Manager}, {Shelf Stacker}, and say I have one name in each, maybe {John Doe} intersects both {Checkout} and {Shelf Stacker}.
I'm just a bit confused with what is meant by type, I thought they may mean to write the function, map it, and state whether it's surjective, injective etc?
I've just been told "no that's not the case..but I'm not saying any more!"
Could someone please help me try to figure this out? Or point me in the right direction? I'm lost!
functions
asked Nov 29 at 19:49
CerKL
1
Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00
add a comment |
I've been asked to define a function getEmployees that maps each role into the set of names who have that role within a business. I need to define both the type and mapping of this function.
So say I have a few sets - {Checkout}, {Manager}, {Shelf Stacker}, and say I have one name in each, maybe {John Doe} intersects both {Checkout} and {Shelf Stacker}.
I'm just a bit confused with what is meant by type, I thought they may mean to write the function, map it, and state whether it's surjective, injective etc?
I've just been told "no that's not the case..but I'm not saying any more!"
Could someone please help me try to figure this out? Or point me in the right direction? I'm lost!
functions
asked Nov 29 at 19:49
CerKL
1
I've been asked to define a function getEmployees that maps each role into the set of names who have that role within a business. I need to define both the type and mapping of this function.
So say I have a few sets - {Checkout}, {Manager}, {Shelf Stacker}, and say I have one name in each, maybe {John Doe} intersects both {Checkout} and {Shelf Stacker}.
I'm just a bit confused with what is meant by type, I thought they may mean to write the function, map it, and state whether it's surjective, injective etc?
I've just been told "no that's not the case..but I'm not saying any more!"
Could someone please help me try to figure this out? Or point me in the right direction? I'm lost!
functions
functions
asked Nov 29 at 19:49
CerKL
1
asked Nov 29 at 19:49
CerKL
1
asked Nov 29 at 19:49
CerKL
1
asked Nov 29 at 19:49
CerKL
1
asked Nov 29 at 19:49
CerKL
1
1
Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00
add a comment |
Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00
Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00
add a comment |
1 Answer
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active
oldest
votes
Let $E$ denote the set of employees and $R$ the set of roles, and $X$ the set of ordered pairs $(e,,r)$ with $ein E,,rin R$ such that $e$ has role $r$. The getEmployees method is $rmapsto{ein E|(e,,r)in X}$. Similarly, a getRoles method would be $emapsto{rin R|(e,,r)in X}$.
answered Nov 29 at 19:53
J.G.
22.3k22034
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.List<Role>or any number of similar things in C#.
– J.G.
Nov 29 at 20:18
add a comment |
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Let $E$ denote the set of employees and $R$ the set of roles, and $X$ the set of ordered pairs $(e,,r)$ with $ein E,,rin R$ such that $e$ has role $r$. The getEmployees method is $rmapsto{ein E|(e,,r)in X}$. Similarly, a getRoles method would be $emapsto{rin R|(e,,r)in X}$.
answered Nov 29 at 19:53
J.G.
22.3k22034
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.List<Role>or any number of similar things in C#.
– J.G.
Nov 29 at 20:18
add a comment |
Let $E$ denote the set of employees and $R$ the set of roles, and $X$ the set of ordered pairs $(e,,r)$ with $ein E,,rin R$ such that $e$ has role $r$. The getEmployees method is $rmapsto{ein E|(e,,r)in X}$. Similarly, a getRoles method would be $emapsto{rin R|(e,,r)in X}$.
answered Nov 29 at 19:53
J.G.
22.3k22034
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.List<Role>or any number of similar things in C#.
– J.G.
Nov 29 at 20:18
add a comment |
Let $E$ denote the set of employees and $R$ the set of roles, and $X$ the set of ordered pairs $(e,,r)$ with $ein E,,rin R$ such that $e$ has role $r$. The getEmployees method is $rmapsto{ein E|(e,,r)in X}$. Similarly, a getRoles method would be $emapsto{rin R|(e,,r)in X}$.
answered Nov 29 at 19:53
J.G.
22.3k22034
Let $E$ denote the set of employees and $R$ the set of roles, and $X$ the set of ordered pairs $(e,,r)$ with $ein E,,rin R$ such that $e$ has role $r$. The getEmployees method is $rmapsto{ein E|(e,,r)in X}$. Similarly, a getRoles method would be $emapsto{rin R|(e,,r)in X}$.
answered Nov 29 at 19:53
J.G.
22.3k22034
answered Nov 29 at 19:53
J.G.
22.3k22034
answered Nov 29 at 19:53
J.G.
22.3k22034
answered Nov 29 at 19:53
J.G.
22.3k22034
22.3k22034
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.List<Role>or any number of similar things in C#.
– J.G.
Nov 29 at 20:18
add a comment |
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.List<Role>or any number of similar things in C#.
– J.G.
Nov 29 at 20:18
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
Thanks for this! I was tripping up over the method, could you please help me figure out what they might mean by "define the type" though?
– CerKL
Nov 29 at 20:15
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.
List<Role> or any number of similar things in C#.– J.G.
Nov 29 at 20:18
@CerKL Presumably the types of an employee are that employee's roles. The term "type" in this context might have meant the type of a variable in programming, e.g.
List<Role> or any number of similar things in C#.– J.G.
Nov 29 at 20:18
add a comment |
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Are you sure that your question is about Matehmatics?
– Tito Eliatron
Nov 29 at 19:56
@TitoEliatron Discrete Maths within Comp Sci - sorry for the grey area
– CerKL
Nov 29 at 20:00