bro学习笔记之类型及语法1

将record转成string51Testing软件测试网9~%^abNo1Y7Tl
 例： local coonid: string =fmt("%s", state$conn$id);51Testing软件测试网*cY?9];V\

类型：51Testing软件测试网
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table类型(可以理解为数组)
5q'uz@)]eM0 例：global conn_table: table[count] of string &default = "null";51Testing软件测试网{F'r1j$G s(Z
 即等价于｛
]3C.`%w/L;d;z9u0   1 = "null",51Testing软件测试网-Mj@`$}I3[0q&]\G
   2 = "null",
l@w%t#j;a0   3 = "null",51Testing软件测试网{#~r~7O*q~1N]:o
   ……51Testing软件测试网%J&R/X;h"|%\ h/b
  ｝ ＃后面的例子中认为这里的1,2,3等为数组的下标51Testing软件测试网*t9stREiC6X
record类型(用$引用内部记录)
b^i)na#pMm$X0 例：
;[u8} @n*^\5N0 type conn_id: record 51Testing软件测试网5Q,nlBc"w
 {
F!WWv.z#P)f b0  orig_h: addr;  # Address of originating host.
,W gi~'[!h[Ah0  orig_p: port;  # Port used by originator.51Testing软件测试网+g2hl4N|{
  resp_h: addr;  # Address of responding host.
5G'UdvC0  resp_p: port;  # Port used by responder.
n9e.gqek?$]_,`z0         };51Testing软件测试网%\]b9E5M#J
\
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  local id: conn_id;51Testing软件测试网.K.})|8pv)SJ
  id$orig_h = 207.46.138.11;
B)K#a+N+NBBGXD0         id$orig_p = 31337/tcp;
JB3G.AQyG ]0         id$resp_h = 207.110.0.15;51Testing软件测试网qL5PgD*F:dI
         id$resp_p = 22/tcp;  # explicitly assign each fields51Testing软件测试网]zH"m+UKsi

-bcM!{5VG4h)v)Y0or  id = [$orig_h = 207.46.138.11, $orig_p = 31337/tcp,
,I%}&T%g^4gQ)c0               $resp_h = 207.110.0.15, $resp_p = 22/tcp];51Testing软件测试网C\jU$u"jY.Yb

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循环：(只能用for进行循环)51Testing软件测试网:|b}6?bSp4T:F
for
&X!Z:];c0HDF0 例： const allconn = {1,2,3,4,5,6,7,8,9,10} &redef ;51Testing软件测试网*sY'?~4jdiv2|[Jc]
  local i: count　（i 也可以不用预先定义）
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^`5lU dh0  for (i in allconn)   # 只能在下标中循环　缺点：不能保证有序的进行循环（迭代）iterate,即i可能无序进行｛2,5,8,6,4,7,9,3,1,10｝51Testing软件测试网 f0U'{I5N~

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Ye1S [,s,u"m0 next; (only valid in for,when execute,causes the loop to proceed to next iteration value.)

$cd^#h*l*oc*T0 break; (only valid in for,when execute,causes the loop to immediately exit.)51Testing软件测试网z6Xg)m^sA4|LLc

模式匹配（pattern matching）
p0Wrs&\~x!o0expr1 == expr2 51Testing软件测试网5t
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expr1 "!= expr2
9peF:VV9EY!W0 前两个pattern和string可以在左边也可以有右边51Testing软件测试网G(y\#{/Ul&K
expr1 in expr2
uMm9c"M-H(J5g0expr1 "!in expr2 51Testing软件测试网3v!y4QjZB |(t
 后两个只能pattern在左边，string在右边

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