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Can you put a conditional statement inside a here-doc?
IE:
sky = 1
str = <<EOF
The sky is #{if sky == 1 then blue else green end}
EOF
Thanks
504
Example: We have a conditional statement If it is raining, we will not play. Let, A: It is raining and B: we will not play. Then; If A is true, that is, it is raining and B is false, that is, we played, then the statement A implies B is false.
To better understand deductive reasoning, we must first learn about conditional statements. A conditional statement has two parts: hypothesis (if) and conclusion (then). In fact, conditional statements are nothing more than “If-Then” statements!
Heredoc is one of the ways to store or print a block of text in PHP. The data stored in the heredoc variable is more readable and error-free than other variables for using indentation and newline.
Yes, you can. (Did you try it?) HEREDOCs declared as you did act like a double-quoted string. If you happened to want the reverse, you would single-quote your HEREDOC indicator like so:
str = <<EOF
#{ "this is interpolated Ruby code" }
EOF
str = <<'EOF'
#{ This is literal text }
EOF
The "green" and "blue" in your example are wrong, unless you have methods or local variables with those names. You probably wanted either:
str = <<EOF
The sky is #{if sky==1 then 'blue' else 'green' end}
EOF
...or the terser version:
str = <<EOF
The sky is #{sky==1 ? :blue : :green}
end
As with all string interpolation, the result of each expression has #to_s called on it. As the string representation of a symbol is the same text, using symbols in interpolation like that saves one character when typing. I use it most often like:
cats = 13
str = "I have #{cats} cat#{:s if cats!=1}"
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