序列
本章主要展示有关序列的代码参考，比如判断是否是序列、倒取序列成员和子序列、循环取序列成员和子序列、取出子序列但越界不报错、取出第一个非空值、产生由同一成员构成的定长序列、复制（多遍）序列产生新序列、产生连续的数列区间、交换序列的部分成员、在序列中插入（多个）成员、删除序列中的（多个）成员、修改序列的（多个）成员、修改指定位置的序列成员越界则自动补、将序列整个作为成员插入另一序列、字典式比较序列大小、序列倒置、查看和统计序列非重复成员和个数、将序列补足到指定长度、序列逻辑运算等。
判断是否是序列
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A |
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1 |
=ifa([1,2,3]) |
true |
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2 |
=ifa(123) |
false |
倒取序列成员和子序列
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A |
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1 |
=[1,2,3,4,5,6].m(-3) |
4 |
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2 |
=[1,2,3,4,5,6].m([-2,-3]) |
[5,4] |
循环取序列成员和子序列
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A |
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1 |
[1,2,3,4,5,6] |
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2 |
=A1.m@r(10) |
4 |
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3 |
=A1.m@r([1,5,10]) |
[1,5,4] |
取出子序列但越界不报错
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A |
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1 |
=[1,2,3,4,5,6].m@0([10,1,4,5]) |
[1,4,5]，越界成员不出现 |
产生由同一成员构成的定长序列
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A |
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1 |
=5*[1] |
[1,1,1,1,1] |
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2 |
=3.("a") |
[a,a,a] |
复制（多遍）序列产生新序列
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A |
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1 |
=[1,2,3] |
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2 |
=3*A1 |
[1,2,3,1,2,3,1,2,3] |
产生连续的数列区间
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A |
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1 |
=to(8) |
[1,2,3,4,5,6,7,8] |
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2 |
=to(3,5) |
[3,4,5]， 从3到5 |
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3 |
=to@s(3,5) |
[3,4,5,6,7]，从3起数5个 |
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4 |
=to@s(7,-3) |
[7,6,5] |
交换序列的部分成员
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A |
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1 |
=[1,2,3,4,5,6,7,8].swap([2,3,4],[6,7]) |
[1,6,7,5,2,3,4,8] |
在序列中插入（多个）成员
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A |
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1 |
=[1,2,3,4].insert(0,5) |
[1,2,3,4,5] ，插在后面 |
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2 |
=[1,2,3,4].insert(1,5) |
[5,1,2,3,4] ，在前面插 |
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3 |
=[1,2,3,4].insert(3,[5,6]) |
[1,2,5,6,3,4] ，插入多个 |
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4 |
[1,2,3,4] |
[1,2,3,5,6,4]，A5运行后的A4 |
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=A4.insert@n(4,[5,6]) |
[5,6]，返回增加的成员 |
删除序列中的（多个）成员
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A |
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1 |
=[11,12,13,14].delete(2) |
[11,13,14]，删除1个 |
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=[11,12,13,14].delete([2,4]) |
[11,13]，删除多个 |
修改序列的（多个）成员
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A |
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1 |
=[11,12,13,14] |
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2 |
>A1(2)=6 |
A1的值为 [11,6,13,14] |
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>A1([3,4])=[7,8] |
A1的值为[11,6,7,8] |
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>A1.run(~=~%2) |
A1的值为[1,0,1,0] |
修改指定位置的序列成员，越界则自动补
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A |
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1 |
=[11,12,13,14,15].modify(2,6) |
[11,6,13,14,15] |
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=[11,12,13,14,15].modify(10,10) |
[11,12,13,14,15,null,null,null,null,10] |
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=[11,12,13,14,15].modify(2,[7,8,9]) |
[11,7,8,9,15] |
将序列整个作为成员插入另一序列
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A |
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1 |
[1,2,3,4] |
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2 |
[5,6,7,8] |
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3 |
=A1.insert(3,[A2]) |
[1,2,[5,6,7,8],3,4] |
字典式比较序列大小
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A |
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1 |
=cmp(["a","b","c"],["d","e","f"]) |
-1，"a"的ASCII码比"d"小1 |
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=cmp(["d","b","c"],["a","e","f"]) |
1，"d"的ASCII码比"a"大1 |
序列倒置
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A |
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1 |
[1,3,5,2,4,6] |
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2 |
=A1.rvs() |
[6,4,2,5,3,1] |
查看和统计序列非重复成员和个数
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A |
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1 |
=["a","c","d","e","f","a","a","b"] |
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2 |
=A1.id() |
[a,b,c,d,e,f]，去重并排序 |
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3 |
=A1.id@o() |
[a,c,d,e,f,a,b]，仅去掉相邻重复成员 |
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4 |
=A1.id@u() |
[a,c,d,e,f,b]，去重保持原序 |
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5 |
=A1.icount() |
6，去重后的成员个数 |
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6 |
=A1.icount@o() |
7，仅去掉相邻重复成员后的个数 |
将序列补足到指定长度
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A |
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1 |
[a,b,c,d,e,f] |
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2 |
=A1.pad(null,9) |
[a,b,c,d,e,f,null,null,null]，右侧补足 |
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3 |
=A1.pad@l(null,9) |
[null,null,null,a,c,d,e,f,a,b]，左侧补足 |
序列逻辑运算
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A |
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1 |
=[2<10,3>4,1!=1] |
[true,false,false] |
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2 |
=A1.cand() |
false |
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3 |
=[20,1<2].cand() |
true |
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4 |
=[null,1<2].cand() |
false |
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5 |
=[1!=1,3<2].cor() |
false |