Ouf, mon tri de table fonctionne enfin, non seulement mon import de csv fonctionne bien, mais maintenant je consomme très très peu de RAM pour charger tout le fichier

Tests/a_tst_sort.lua

@@ -0,0 +1,125 @@
+-- Scripts pour tester le tri (sort) d'un tableau d'adresse MAC en fonction du signal de réception
+-- pour les tests on charge un fichier CSV de d'adresse MAC sniffées précédemment
+-- source: https://wxlua.developpez.com/tutoriels/lua/general/cours-complet/#L6-f
+-- source: https://wxlua.developpez.com/tutoriels/lua/general/cours-complet/#L13-g
+
+print("\n a_tst_sort.lua zf190209.2014 \n")
+
+zmac_adrs={}
+zmac_adrs_index={}
+
+
+
+function zshow()
+    for i=1, #zmac_adrs do
+        print(i,zmac_adrs[i])
+        zindex, zadrs, zname, zrssi, ztime = zmac_adrs[i]:match("([^,]+),([^,]+),([^,]+),([^,]+),([^,]+)")
+        print("toto",zindex, zadrs, zname, zrssi, ztime, "tutu")
+    end
+end
+
+function zload_tableau()
+    filename="tst_sniffer_wifi1.csv"
+    if file.open(filename, "r") then
+        repeat
+            local line=file.read('\n')
+            if line then
+--                print("line: "..line)
+                local zfield = {}   local zpart=""
+                for zpart in line:gmatch("[^,]+") do
+                    zfield[#zfield+1] = zpart
+                end
+                zmac_adrs[#zmac_adrs+1]=line:sub(1, -2)
+--                zmac_adrs_index[zfield[2]]=#zmac_adrs
+            end
+        until not line    
+        file.close()
+    end
+end
+
+
+--zload_tableau()
+
+--print("tableau chargé")     --important, c'est pour attendre que le tableau soit complètement chargé !
+--zshow()
+
+
+function zsort_tableau()
+    print("tri du tableau")
+--    table.sort(zmac_adrs, function(a,b) return a.zrssi < b.zrssi end)
+    table.sort(zmac_adrs, function(a,b) 
+        return a:match("[^,]+,[^,]+,[^,]+,([^,]+),[^,]+") < b:match("[^,]+,[^,]+,[^,]+,([^,]+),[^,]+") 
+    end)
+end
+
+
+
+function test_ram_table()
+    zmac_adrs={}
+    for i=1, 70 do
+        print(i)
+        --zmac_adrs[#zmac_adrs+1]={adrs="b8:d7:af:a6:bd:86", zname=0, zrssi=-50, ztime= 0}
+        zmac_adrs[i]={adrs="b8:d7:af:a6:bd:86", zname=0, zrssi=-50, ztime= 0}
+    end
+end
+
+
+function find_adrs(zadrs)
+    for i=1, #zmac_adrs do
+        if zadrs == zmac_adrs[i]:match("[^,]+,([^,]+),[^,]+,[^,]+,[^,]+") then
+            return zmac_adrs[i]
+        end
+    end
+    return nil
+end
+
+
+
+
+
+--[[
+test_ram_table()
+
+zload_tableau()
+zsort_tableau()
+zshow()
+
+print(find_adrs("02:ec:f1:a1:c8:29"))
+print(find_adrs("da:a1:19:b6:6b:50"))
+
+
+
+
+
+
+print(zmac_adrs_index["02:ec:f1:a1:c8:29"])
+print(zmac_adrs[70])
+
+t1, t2, t3, t4=zmac_adrs[70]:match("[^,]+,[^,]+,[^,]+,([^,]+),[^,]+")
+print(t1, t2, t3, t4)
+print(zmac_adrs[70]:match("[^,]+,[^,]+,[^,]+,([^,]+),[^,]+"))
+
+zmac_adrs=nil
+zmac_adrs={}
+
+zmac_adrs_index=nil
+zmac_adrs_index={}
+
+
+zmac_adrs_index={}
+zmac_adrs_index["toto"]=3
+print(zmac_adrs_index["toto"])
+
+
+]]
+
+
+
+
+function zround(num, dec)
+    local mult = 10^(dec or 0)
+    return math.floor(num * mult + 0.5) / mult
+end
+
+
+

Tests/tst_sniffer_wifi1.csv

@@ -0,0 +1,73 @@
+1,da:a1:19:9b:4a:ba,0,-59,0
+2,9a:2e:66:00:03:c2,0,-58,0
+3,02:50:09:00:02:1e,0,-50,0
+4,9a:e6:33:b4:e9:a3,0,-58,0
+5,02:be:a3:2d:79:40,0,-40,0
+6,da:a1:19:b6:6b:50,0,-18,0
+7,f6:58:e4:25:70:b8,0,-57,0
+8,16:92:17:8f:1b:8c,0,-58,0
+9,9a:b8:4c:16:fe:f2,0,-59,0
+10,80:58:f8:17:dc:d8,0,-48,0
+11,c0:a6:00:bf:4e:43,0,-55,0
+12,80:58:f8:69:65:61,0,-42,0
+13,56:c8:77:a2:ac:9a,0,-57,0
+14,80:58:f8:49:1b:9d,0,-35,0
+15,26:b4:90:7b:35:4c,0,-57,0
+16,02:ab:db:d0:ce:ae,0,-34,0
+17,da:a1:19:fa:ba:d3,0,-59,0
+18,da:a1:19:95:ad:85,0,-57,0
+19,3a:42:0a:8d:2b:89,0,-58,0
+20,02:a5:79:4e:6c:8a,0,-42,0
+21,da:a1:19:5a:8a:7a,0,-58,0
+22,da:a1:19:d2:cb:be,0,-59,0
+23,cc:c0:79:7d:f5:d5,S7 Melanie,0,0
+24,da:a1:19:6a:ce:8f,0,-55,0
+25,1a:8c:3b:82:77:be,0,-58,0
+26,da:a1:19:01:2e:80,0,-54,0
+27,b8:d7:af:a6:bd:86,S7 zf,0,0
+28,96:a6:83:5c:39:15,0,-56,0
+29,da:a1:19:5f:b4:06,0,-52,0
+30,d8:30:62:5a:d6:3a,IMAC Maman,0,0
+31,4a:0f:35:e2:24:22,0,-47,0
+32,be:d8:cc:17:36:2c,0,-41,0
+33,02:2a:5c:ff:53:d3,0,-47,0
+34,da:a1:19:e1:e9:b7,0,-49,0
+35,da:a1:19:eb:5e:a2,0,-58,0
+38,da:a1:19:99:b6:98,0,-58,0
+36,02:6a:8d:b8:14:e2,0,-37,0
+37,80:58:f8:3d:5d:59,0,-37,0
+39,02:00:6c:8a:09:a9,0,-35,0
+40,ba:4b:28:9c:18:b6,0,-59,0
+41,da:a1:19:41:cb:f0,0,-55,0
+42,d6:75:c7:4e:52:20,0,-56,0
+43,da:a1:19:fa:53:66,0,-32,0
+44,92:76:98:d8:ab:ce,0,-56,0
+45,02:6e:d1:5f:35:c6,0,-40,0
+46,da:a1:19:a7:be:86,0,-50,0
+47,5c:f9:38:a1:f7:f0,MAC zf,-28,0
+48,80:58:f8:e6:e2:de,0,-47,0
+49,0c:2c:54:b3:c5:1a,0,-34,0
+50,da:a1:19:e1:23:63,0,-57,0
+51,da:a1:19:ec:26:dd,0,-56,0
+52,02:62:96:8b:80:4f,0,-29,0
+53,02:de:2f:a2:95:98,0,-40,0
+54,0e:c6:f3:36:ae:d9,0,-58,0
+55,da:a1:19:e8:48:bd,0,-49,0
+56,02:be:a3:95:0e:8b,0,-30,0
+57,ca:8e:46:cc:78:bd,0,-58,0
+58,80:58:f8:44:09:ce,0,-30,0
+59,02:07:49:35:67:10,0,-58,0
+60,c0:ee:fb:4a:ff:28,0,-55,0
+61,da:a1:19:ed:93:84,0,-59,0
+62,02:c5:a0:96:05:bd,0,-32,0
+63,da:a1:19:a6:a0:93,0,-56,0
+64,46:79:22:70:f5:b8,0,-59,0
+65,86:27:18:64:f8:c0,0,-57,0
+66,da:a1:19:89:2c:80,0,-59,0
+67,da:a1:19:01:85:98,0,-47,0
+68,80:58:f8:1c:18:4b,0,-39,0
+69,da:a1:19:30:32:b9,0,-55,0
+70,02:ec:f1:a1:c8:29,0,-49,0
+71,02:e6:ac:b3:6e:40,0,-43,0
+72,da:a1:19:70:fc:f2,0,-28,0
+73,88:e9:fe:6b:ec:1e,MAC Luc,0,0