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In this Discussion
Merge/append "tables" in lua gideros?
pie
Member
Hi,
I think that this one should be easy :P but I can't see it...
I need to append one table to another, on certain conditions.
I don't have my code with me now, so I'll try to write down the logic flow.
I have 2 tables t1 and t2:
t1 = {}
t1[i] = {A,B,C}
t1 is updated by user actions,
t2 is a copy of t1, and its values are processed by function processData(t2) until there are no more t2[i] and then t2 is set to {} by the same function.
after filling t2 (copying values from t1 to t2), t1 resets to empty and starts collecting values again.
t2 = t1
t1 = {}
There is a condition in which I need to append t1 values to t2, before emptying t1
(if t2 is not empty, since if there are no more t2[i] to process, processData() sets t2 = {})
how do I append data from t1[i] to t2[i]?
Following, a "real" example:
1) first data collection
t1[1] = {A,B,C}
t1[2] = {A1,B1,C1}
t2 = t1
t1 = {}
2)next data collection in t1, t2 already populated with previous data, t2data not yet processed, so "t2 is not empty".
t1[1] = {D,E,F}
t1[2] = {G,H,I}
t1[3] = {J,K,L}
t2[1] = {A,B,C}
t2[2] = {A1,B1,C1}
3) if "t2 is not empty", append data from t1 to t2 so that in the end, t2 values are:
t2[1] = {A,B,C}
t2[2] = {A1,B1,C1}
t2[3] = {D,E,F}
t2[4] = {G,H,I}
t2[5] = {J,K,L}
I suppose I have to use table.insert but after some tests I couldn't figure out how to use it.
Any suggestion is appreciated, thank you in advance
kind regards
P.
I think that this one should be easy :P but I can't see it...
I need to append one table to another, on certain conditions.
I don't have my code with me now, so I'll try to write down the logic flow.
I have 2 tables t1 and t2:
t1 = {}
t1[i] = {A,B,C}
t1 is updated by user actions,
t2 is a copy of t1, and its values are processed by function processData(t2) until there are no more t2[i] and then t2 is set to {} by the same function.
after filling t2 (copying values from t1 to t2), t1 resets to empty and starts collecting values again.
t2 = t1
t1 = {}
There is a condition in which I need to append t1 values to t2, before emptying t1
(if t2 is not empty, since if there are no more t2[i] to process, processData() sets t2 = {})
how do I append data from t1[i] to t2[i]?
Following, a "real" example:
1) first data collection
t1[1] = {A,B,C}
t1[2] = {A1,B1,C1}
t2 = t1
t1 = {}
2)next data collection in t1, t2 already populated with previous data, t2data not yet processed, so "t2 is not empty".
t1[1] = {D,E,F}
t1[2] = {G,H,I}
t1[3] = {J,K,L}
t2[1] = {A,B,C}
t2[2] = {A1,B1,C1}
3) if "t2 is not empty", append data from t1 to t2 so that in the end, t2 values are:
t2[1] = {A,B,C}
t2[2] = {A1,B1,C1}
t2[3] = {D,E,F}
t2[4] = {G,H,I}
t2[5] = {J,K,L}
I suppose I have to use table.insert but after some tests I couldn't figure out how to use it.
Any suggestion is appreciated, thank you in advance
kind regards
P.
Comments
I think that there is nothing more sophisticated than looping through second and inserting values in the first one as:
and now I feel a bit stupid... L-)