Why is the size of array in TCL script is not given properly by array size <array_name>

Question

Here I am having a array of 4 elements but the it prints the value as 11 so how does the size has become 11 instead of 4

array set ipname {UART TEST SPI I2C}
set bsize [array size ipname];
puts "$bsize"

Donal Fellows · Accepted Answer · 2017-05-31 14:54:42Z

2

The array set (which only makes two elements in your case!) does not remove any existing contents of the array, which must have had between 9 and 11 elements in it previously. If I run your code in a bare tclsh, it prints 2. If I then follow up with parray, it tells me what it did:

% parray ipname
ipname(SPI)  = I2C
ipname(UART) = TEST

answered May 31, 2017 at 14:54

Donal Fellows

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2 Comments

Anjaneyulu Over a year ago

Once we have 4 elements in a array it will give correct size only if its size increased ?? i.e if the elements are reduces it always gives 4 and if more than 4 it provides accurate result ?

Brad Lanam Over a year ago

Try: set bsize [llength [array names ipname]]

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