User:Xenwolf/SandBox: Difference between revisions

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 == Testing factor notation ==
-Input: <code>2^-4 * 3^4 * 5^-1</code>
+This solution requires valid (and sensible) input, there is no intelligence on board that would be able to detect zero divisions like <code>0^-1</code>.
-Code: <code><nowiki>{{#replace:{{#regex: 2^-4 * 3^4 * 5^-1|/(\d+)\s*\^\s*(-?\d+)(\s*\*\s*)?/|\1<sup>\2</sup> \3&amp;nbsp;}}|*|⋅}}</nowiki></code>
+=== 1st version with mandatory exponents ===
-Output: {{#replace:{{#regex: 2^-4 * 3^4 * 5^-1|/(\d+)\s*\^\s*(-?\d+)(\s*\*\s*)?/|\1<sup>\2</sup> \3&nbsp;}}|*|⋅}}
+: Input: <code>2^-4 * 3^4 * 5^-1</code>
+: Code: <code><nowiki>{{#replace:{{#regex: 2^-4 * 3^4 * 5^-1|/(\d+)\s*\^\s*(-?\d+)(\s*\*\s*)?/|\1<sup>\2</sup> \3&amp;nbsp;}}|*|⋅}}</nowiki></code>
+: Output: {{#replace:{{#regex: 2^-4 * 3^4 * 5^-1|/(\d+)\s*\^\s*(-?\d+)(\s*\*\s*)?/|\1<sup>\2</sup> \3&nbsp;}}|*|⋅}}
+=== 2nd version with optional exponents ===
+: Input: <code>2^2 * 5 * 11^-1</code>
+: Code: <code><nowiki>{{#replace:{{#regex: 2^2 * 5 * 11^-1|/(\d+)(?:\s*\^\s*(-?\d+))?(\s*\*\s*)?/|\1<sup>\2</sup> \3&amp;nbsp;}}|*|⋅}}</nowiki></code>
+: Output:  {{#replace:{{#regex: 2^2 * 5 * 11^-1|/(\d+)(?:\s*\^\s*(-?\d+))?(\s*\*\s*)?/|\1<sup>\2</sup> \3&nbsp;}}|*|⋅}}