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=== Error Trapping, Debugging and Tracing === ...gging and or code testing. APL frequently makes use of complex idioms and debugging helps better understand the way the idiom(s) may be working. Important: Fr

Event Simulate [with either Error Message(⎕EM) or Event Type(⎕ET)] - for debugging, user alerts, detailed at-length error messaging purposes. ...'s effect on the APL interpreter is to show on the user's display, certain debugging information, depending on how the call to ⎕ES was made.</td>

==Output Debugging== ...0x00 to 0x1F, excluding CR and LF). For that case, you may turn on Output Debugging through the menu items '''Edit | Customize... | User Preferences'''. When

⎕DM, for debugging purposes, if needed by User. '''⎕ELX is useful''' in situations when a '

...e a string expression. <apll>⎕EC</apll> is frequently used for testing and debugging purposes.</td> 1 = Expression with a result which would display (for debugging purposes this means '''OK''', <apll>R</apll> was '''not''' problematic.<br>

...if Error Trapping is being used, or for system-function and user-function debugging purposes. For example:

<br>)SI is useful for debugging purposes and as a reminder of where you the APL programmer or an APL user e

⎕DM, for debugging purposes, if needed by User. ⎕EA like ⎕ELX is useful in situations when

* [[Debugging]]

...out program, especially see file <debug.c> for string printing to console, debugging. See function int oprintfW, usage example per <updates.c>, oprintfW (L"%3d:

<p>Many times in programming - for debugging, data scrutiny or other purposes - it is very important to know <b>exactly<

...]''' intrinsic Interpreter design feature which is used for APL-programmer debugging purposes.<br><br>

<li>David Rabenhorst has contributed many very useful ideas and many hours debugging the implementation.</li>

...red, were impacted for overall programming structural integrity, potential debugging/compilation, and NARS2000 overall modeling purposes. Not every System Func

For development and debugging purposes: You as APL Interpreter developer normally want to want to <u>firs