Nested string interpolation

I've faced an issue with nested string interpolation in C# 6.

For example, there is a string:

string test = "StartText MiddleText1 MiddleText2 EndText";

If I want to apply ToUpper() method for MiddleText1 only, I can do this way:

string test = $@"StartText {"MiddleText1".ToUpper()} MiddleText2 EndText";

But what if I want to apply a string method, for example Replace() for this part of string:

{"Middletext1".ToUpper()} MiddleText2

I expected that something like this will work:

string test = $@"StartText {"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

But this syntax is wrong - I've tried a lot variations, played with quotas but I couldn't get correct syntax for this purpose.
I'd wish to not split the string in a different parts. Is there a way to solve it using interpolation feature only?

asked Nov 19 '18 at 23:31

Vladimir

129211

2

Just shooting from the hip here... string test = $@"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText"; ... that said, this looks just painful to read and really defeats the purpose of string interpolation.

– Glorin Oakenfoot
Nov 19 '18 at 23:35

2

Stop trying to do everything in one line, if you broke this apart you would know the problem

– TheGeneral
Nov 19 '18 at 23:42

Thank Glorin, nice shot. And could you suggest another way for this task without such bad readability - to involve interim variable?

– Vladimir
Nov 19 '18 at 23:45

add a comment |

I've faced an issue with nested string interpolation in C# 6.

For example, there is a string:

string test = "StartText MiddleText1 MiddleText2 EndText";

If I want to apply ToUpper() method for MiddleText1 only, I can do this way:

string test = $@"StartText {"MiddleText1".ToUpper()} MiddleText2 EndText";

But what if I want to apply a string method, for example Replace() for this part of string:

{"Middletext1".ToUpper()} MiddleText2

I expected that something like this will work:

string test = $@"StartText {"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

asked Nov 19 '18 at 23:31

Vladimir

129211

2

Just shooting from the hip here... string test = $@"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText"; ... that said, this looks just painful to read and really defeats the purpose of string interpolation.

– Glorin Oakenfoot
Nov 19 '18 at 23:35

2

Stop trying to do everything in one line, if you broke this apart you would know the problem

– TheGeneral
Nov 19 '18 at 23:42

Thank Glorin, nice shot. And could you suggest another way for this task without such bad readability - to involve interim variable?

– Vladimir
Nov 19 '18 at 23:45

add a comment |

I've faced an issue with nested string interpolation in C# 6.

For example, there is a string:

string test = "StartText MiddleText1 MiddleText2 EndText";

If I want to apply ToUpper() method for MiddleText1 only, I can do this way:

string test = $@"StartText {"MiddleText1".ToUpper()} MiddleText2 EndText";

But what if I want to apply a string method, for example Replace() for this part of string:

{"Middletext1".ToUpper()} MiddleText2

I expected that something like this will work:

string test = $@"StartText {"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

asked Nov 19 '18 at 23:31

Vladimir

129211

I've faced an issue with nested string interpolation in C# 6.

For example, there is a string:

string test = "StartText MiddleText1 MiddleText2 EndText";

If I want to apply ToUpper() method for MiddleText1 only, I can do this way:

string test = $@"StartText {"MiddleText1".ToUpper()} MiddleText2 EndText";

But what if I want to apply a string method, for example Replace() for this part of string:

{"Middletext1".ToUpper()} MiddleText2

I expected that something like this will work:

string test = $@"StartText {"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

c# string interpolation

asked Nov 19 '18 at 23:31

Vladimir

129211

asked Nov 19 '18 at 23:31

Vladimir

129211

asked Nov 19 '18 at 23:31

Vladimir

129211

asked Nov 19 '18 at 23:31

Vladimir

129211

asked Nov 19 '18 at 23:31

Vladimir

129211

2

Just shooting from the hip here... string test = $@"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText"; ... that said, this looks just painful to read and really defeats the purpose of string interpolation.

– Glorin Oakenfoot
Nov 19 '18 at 23:35

2

Stop trying to do everything in one line, if you broke this apart you would know the problem

– TheGeneral
Nov 19 '18 at 23:42

Thank Glorin, nice shot. And could you suggest another way for this task without such bad readability - to involve interim variable?

– Vladimir
Nov 19 '18 at 23:45

add a comment |

2

Just shooting from the hip here... string test = $@"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText"; ... that said, this looks just painful to read and really defeats the purpose of string interpolation.

– Glorin Oakenfoot
Nov 19 '18 at 23:35

2

Stop trying to do everything in one line, if you broke this apart you would know the problem

– TheGeneral
Nov 19 '18 at 23:42

Thank Glorin, nice shot. And could you suggest another way for this task without such bad readability - to involve interim variable?

– Vladimir
Nov 19 '18 at 23:45

Just shooting from the hip here... string test = $@"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText"; ... that said, this looks just painful to read and really defeats the purpose of string interpolation.

– Glorin Oakenfoot
Nov 19 '18 at 23:35

Stop trying to do everything in one line, if you broke this apart you would know the problem

– TheGeneral
Nov 19 '18 at 23:42

Thank Glorin, nice shot. And could you suggest another way for this task without such bad readability - to involve interim variable?

– Vladimir
Nov 19 '18 at 23:45

add a comment |

1 Answer
1

active

oldest

votes

Stop trying to do everything in one line is my suggestion

The following is the answer

var middle = "MiddleText1";

middle = middle.ToUpper();



var middle2 = $"{middle} MiddleText2";

middle2 = middle2.Replace("x", "y");



string test = $"StartText {middle2} EndText";

Which, when you add it all together.

string test = $"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

In short, you were just missing a $

However, Even this is messy as i am not sure what all the replaces are for, where this text comes from, and what the issue is you are trying to solve

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

1

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

1

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

1

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

|
show 3 more comments

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

Stop trying to do everything in one line is my suggestion

The following is the answer

var middle = "MiddleText1";

middle = middle.ToUpper();



var middle2 = $"{middle} MiddleText2";

middle2 = middle2.Replace("x", "y");



string test = $"StartText {middle2} EndText";

Which, when you add it all together.

string test = $"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

In short, you were just missing a $

However, Even this is messy as i am not sure what all the replaces are for, where this text comes from, and what the issue is you are trying to solve

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

1

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

1

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

1

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

|
show 3 more comments

Stop trying to do everything in one line is my suggestion

The following is the answer

var middle = "MiddleText1";

middle = middle.ToUpper();



var middle2 = $"{middle} MiddleText2";

middle2 = middle2.Replace("x", "y");



string test = $"StartText {middle2} EndText";

Which, when you add it all together.

string test = $"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

In short, you were just missing a $

However, Even this is messy as i am not sure what all the replaces are for, where this text comes from, and what the issue is you are trying to solve

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

1

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

1

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

1

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

|
show 3 more comments

Stop trying to do everything in one line is my suggestion

The following is the answer

var middle = "MiddleText1";

middle = middle.ToUpper();



var middle2 = $"{middle} MiddleText2";

middle2 = middle2.Replace("x", "y");



string test = $"StartText {middle2} EndText";

Which, when you add it all together.

string test = $"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

In short, you were just missing a $

However, Even this is messy as i am not sure what all the replaces are for, where this text comes from, and what the issue is you are trying to solve

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

Stop trying to do everything in one line is my suggestion

The following is the answer

var middle = "MiddleText1";

middle = middle.ToUpper();



var middle2 = $"{middle} MiddleText2";

middle2 = middle2.Replace("x", "y");



string test = $"StartText {middle2} EndText";

Which, when you add it all together.

string test = $"StartText {$"{"MiddleText1".ToUpper()} MiddleText2".Replace("x", "y")} EndText";

In short, you were just missing a $

However, Even this is messy as i am not sure what all the replaces are for, where this text comes from, and what the issue is you are trying to solve

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

edited Nov 20 '18 at 0:06

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

answered Nov 19 '18 at 23:46

TheGeneral

28.4k63365

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

1

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

1

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

1

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

|
show 3 more comments

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

1

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

1

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

1

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

This is good approach, but original text is large and I need to make many similar method invocations, that's why I tried to get one-line solution to avoid creating a lot of additional variables.

– Vladimir
Nov 19 '18 at 23:54

@Vladimir that's fair enough, however you were just missing a $

– TheGeneral
Nov 19 '18 at 23:54

Actually this question came from work with some kind of "html page builder". It uses string extension methods to create html page from some volume of text, returning inner strings embedded in different html tags. For example, it will return some parts in <td> tag, then result embedded in <tr>, then result in <table> tag etc. Now I see It will be really hard readable. Maybe you could suggest another approach?

– Vladimir
Nov 20 '18 at 0:04

@Vladimir codereview.stackexchange.com

– TheGeneral
Nov 20 '18 at 0:18

@Vladimir: Generally the only thing you get for squeezing a lot of operations into a single line, is a horrible time debugging. Because you can not figure out wich of those 3-10 operations is even causing the issue. Do not be to worried about performance. The JiT is pretty good at cutting out dead code and adding/removing Temporary variables in Release builds to improove performance.

– Christopher
Nov 20 '18 at 0:48

|
show 3 more comments

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