= User Commands Int2Hex and Hex2Int =

|| ```Outdated: the Dyalog built-in user command got improved and can now deal with the cases outlined on this page.``` ||

== Overview ==

Although Dyalog comes from two built-in user commands for converting a hex number into an integer and vice versa (`]ToHex` and `]FromHex`), `fromHex` is too limited to be really useful.

For example, is one wishes to convert an error code returned by the Windows Task Scheduler:

{{{
      ]tohex 2147942667                              
* Command Execution Failed: must be 32 bits signed integer
}}}

With the excellent function `Hex` written and contributed by PhilLast - which is the internal engine of the two user commands - this can be avoided:

{{{
      ]Int2hex 2147942667                              
8007010b
      ]Hex2Int 8007010b
2147942667
}}}

This is Phil's underlying code:

{{{
      Hex←{
          ⎕IO←0 ⋄ ⎕ML←1
          t←0∊⊃⍬⍴0⍴⊂⍵
          a←⎕D,'abcdef',⎕D,6⍴⎕A
          t:a⌷⍨⊂⍉16⊥⍣¯1⊢⍵
          16⊥⍉16|a⍳⍵
    ⍝ ⍵ dec-number or hex-string
    ⍝ ← hex-string or dec-number
    ⍝   accepts hex as CAPS or small
    ⍝   returns hex as small
    ⍝   dec to hex is rank increasing
    ⍝   hex to dec is rank decreasing
      }
}}}

== Download ==

[[attachment:Hex.dyalog | Download]] the script.

Authors: Logic=PhilLast, user command=KaiJaeger

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CategoryDyalogUserCommands