k{}
Description:
Get certain bytes from a serial byte to form a new serial byte value.
Syntax:
k{a,…,b:c,…}
Note:
The function gets certain bytes a,…,b:c,… from a serial byte k to form a new serial byte value. {} can only use constants.
Parameters:
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k a |
A serial byte value The ath byte of a serial byte |
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b:c |
The bytes from the bth position to the cth position in a serial byte |
Return value:
A serial byte
Example:
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=k(4,5,6,8){2} |
5; get the second byte from serial byte value k(4,5,6,8) to generate a singe-byte serial byte value |
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=k(4,5,6,8){1:3} |
263430; get the bytes from 1 to 3 from serial byte value k(4,5,6,8) to generate a new serial byte value |
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=k(4,5,6,8){1,2,3} |
263430; get the first 3 bytes from serial byte value k(4,5,6,8) to generate a new serial byte value |
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=k(4,5,6,8){1,2:3} |
263430; get the first byte and the next two bytes from serial byte value k(4,5,6,8) to generate a new serial byte value |
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=k(1,2,3,4,5,6,7){1,2:3,5,6} |
4328719622 get the first, the 2nd and 3rd, and the 5th and the 6th bytes from serial byte value k(1,2,3,4,5,6,7) to generate a new serial byte value |
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A |
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1 |
=create(k1,v1).record([k(1000:3),110000,k(223332:3),2045803,k(31121:3),90730,k(453384:3),78940,k(231410:3),100]) |
Create a table sequence |
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2 |
=file("D:/ckv.ctx") |
The composite table file |
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3 |
=A2.create(#k1:3,v1;k1:3) |
Create the composite table’s base table where key k1 is the serial byte data whose length is 3 |
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4 |
=A3.append(A1.cursor()) |
Append cursor records to the base table |
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5 |
=A3.cursor(k1).fetch() |
Return data of column k1 in the base table
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6 |
=A3.cursor(k1{1}).fetch() |
Get the serial bytes of the fist bytes of k1’s values
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7 |
=A3.cursor(k1{2}).fetch() |
Get the serial bytes of the second bytes of k1’s values
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8 |
=A3.cursor(k1{2:3}).fetch() |
Get the serial bytes of the second and third bytes of k1’s values
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