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| '''''Under Construction''''' The system variable `⎕ML` determines the degree of compatability of Dyalog APL towards IBM's APL2. In general, the value 0 represents "native Dyalog". The higher the value, the close to APL2/ |
The system variable `⎕ML` determines the degree of compatability of Dyalog APL towards IBM's APL2. In general, the value 0 represents "native Dyalog". The higher the value, the closer to APL2/ |
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| Note that with a default installation `⎕ML` is set to 0. | Note that with a default installation `⎕ML` is set to `1`. |
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| ||<tablebgcolor="#ffe" tablestyle="margin-top:1em;font-size:medium">⎕ML←0 || || Native Dyalog (Default) || ||`⎕ML←1` || `Z←∊R` || Monadic `∊` is interpreted as 'enlist' rather than 'type' || ||`⎕ML←2` || `Z←↑R` || Monadic `↑` is interpreted as 'first' rather than 'mix' || || || `Z←⊃R` || Monadic `⊃` is interpreted as 'mix' rather than 'first' || || || `Z←R` || Monadic '' returns the absolute value of the depth of<<BR>>its argument, rather than a negative value if the depths<<BR>>of its sub-arrays are unequal|| ||`⎕ML←3` || `R←X⊂[K]Y` || Dyadic '⊂' follows the APL2 (rather than the original Dyalog APL) convention || |
||<tablebgcolor="#ffe" tablestyle="margin-top:1em;font-size:medium">'''ML setting'''||'''APL'''||'''Remarks'''|| ||`⎕ML←0` || || Native Dyalog (Default) || ||`⎕ML←1` || `∊R` || Monadic `∊` is interpreted as 'enlist' rather than 'type' || ||`⎕ML←2` || `↑R` || Monadic `↑` is interpreted as 'first' rather than 'mix' || || || `⊃R` || Monadic `⊃` is interpreted as 'mix' rather than 'first' || || || `≡R` || For an array with unequal levels of nesting in its subarrays,<<BR>>depth returns the maximum level of nesting. With `⎕ml≤2` <<BR>>depth returns a negative value if the subarrays have unequal depth|| ||`⎕ML←3` || `X⊂[K]Y` || Dyadic `⊂` follows the APL2 rather than the original Dyalog convention || |
DyalogMigrationLevels
The system variable ⎕ML determines the degree of compatability of Dyalog APL towards IBM's APL2. In general, the value 0 represents "native Dyalog". The higher the value, the closer to APL2/
For the time being (2009), 3 is the highest level of compatability one can achieve.
Note that with a default installation ⎕ML is set to 1.
ML setting |
APL |
Remarks |
⎕ML←0 |
|
Native Dyalog (Default) |
⎕ML←1 |
∊R |
Monadic ∊ is interpreted as 'enlist' rather than 'type' |
⎕ML←2 |
↑R |
Monadic ↑ is interpreted as 'first' rather than 'mix' |
|
⊃R |
Monadic ⊃ is interpreted as 'mix' rather than 'first' |
|
≡R |
For an array with unequal levels of nesting in its subarrays, |
⎕ML←3 |
X⊂[K]Y |
Dyadic ⊂ follows the APL2 rather than the original Dyalog convention |
|
⎕TC |
The order of the elements of ⎕TC is the same as in APL2 |