OpenEuphoria

Re: [Phix] Language Feature Request: For Each

• Posted by _tom (admin) Dec 13, 2021
• 1152 views

• ''for'' is a keyword; do not overload

python

• for reference, a Python loop looks like:

for x in mylist: 
   print(x) 

this is a clever way to hide the mess created by off-by-one indexing

suggested new feature

• the OE/Phix equivalent could look like

each <item> in <sequence> do 
   <... statements> 
end each 

sample usage

• simulate the existing ''for'' loop

each {i} in  {"one","two","three"} do 
   ? i 
end each 

1 
2 
3 

• simulate Python loop

each {i,x} in  {"one","two","three"} do 
   ? x 
end each 

"one" 
"two" 
"three" 

• demonstrate Euphoria thinking

each {i,key,value} in {{"eins","uno"}, 
                        {"dwei","duo"}, 
                        {"drei","tres"}} do 
    ? key 
    ? value 
    ? "---" 
 
end each 

"eins" 
"uno" 
"---" 
"dwei" 
"duo" 
"---" 
"drei" 
"tres" 
"---" 

multiple assignment paradigm

the ''each'' statement implies

 
{ i, key, value } := { 3, "drei", "tres" } 
 
                       ^   ================= element as a flat sequence 
                       |                  
                   index 

be well _tom