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better css
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 23 Apr 2025 15:34:48 -0600
parents d2a1dbfd402f
children 31f006c64782
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1925:0156fe64a610 1926:4206242c7a13
1284 Any expression enclosed in parentheses always results in only one value. 1284 Any expression enclosed in parentheses always results in only one value.
1285 Thus, 1285 Thus,
1286 <code>(f(x,y,z))</code> is always a single value, 1286 <code>(f(x,y,z))</code> is always a single value,
1287 even if <code>f</code> returns several values. 1287 even if <code>f</code> returns several values.
1288 (The value of <code>(f(x,y,z))</code> is the first value returned by <code>f</code> 1288 (The value of <code>(f(x,y,z))</code> is the first value returned by <code>f</code>
1289 or <b>nil</b> if <code>f</code> does not return any values.) 1289 or <code>nil</code> if <code>f</code> does not return any values.)
1290 </p> 1290 </p>
1291 <% 1291 <%
1292 end 1292 end
1293 subs = { 1293 subs = {
1294 arithmetic = { 1294 arithmetic = {
1298 <p> 1298 <p>
1299 Luan supports the following arithmetic operators: 1299 Luan supports the following arithmetic operators:
1300 </p> 1300 </p>
1301 1301
1302 <ul> 1302 <ul>
1303 <li><b><code>+</code>: </b>addition</li> 1303 <li><b>+</b>: addition</li>
1304 <li><b><code>-</code>: </b>subtraction</li> 1304 <li><b>-</b>: subtraction</li>
1305 <li><b><code>*</code>: </b>multiplication</li> 1305 <li><b>*</b>: multiplication</li>
1306 <li><b><code>/</code>: </b>float division</li> 1306 <li><b>/</b>: float division</li>
1307 <li><b><code>//</code>: </b>floor division</li> 1307 <li><b>//</b>: floor division</li>
1308 <li><b><code>%</code>: </b>modulo</li> 1308 <li><b>%</b>: modulo</li>
1309 <li><b><code>^</code>: </b>exponentiation</li> 1309 <li><b>^</b>: exponentiation</li>
1310 <li><b><code>-</code>: </b>unary minus</li> 1310 <li><b>-</b>: unary minus</li>
1311 </ul> 1311 </ul>
1312 1312
1313 <p> 1313 <p>
1314 Addition, subtraction, multiplication, division, and unary minus are the same as these operators in Java. Exponentiation uses Java's <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#pow-double-double-">Math.pow</a> function. 1314 Addition, subtraction, multiplication, division, and unary minus are the same as these operators in Java. Exponentiation uses Java's <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#pow-double-double-">Math.pow</a> function.
1315 </p> 1315 </p>
1348 <p> 1348 <p>
1349 Luan supports the following relational operators: 1349 Luan supports the following relational operators:
1350 </p> 1350 </p>
1351 1351
1352 <ul> 1352 <ul>
1353 <li><b><code>==</code>: </b>equality</li> 1353 <li><b>==</b>: equality</li>
1354 <li><b><code>~=</code>: </b>inequality</li> 1354 <li><b>~=</b>: inequality</li>
1355 <li><b><code>&lt;</code>: </b>less than</li> 1355 <li><b>&lt;</b>: less than</li>
1356 <li><b><code>&gt;</code>: </b>greater than</li> 1356 <li><b>&gt;</b>: greater than</li>
1357 <li><b><code>&lt;=</code>: </b>less or equal</li> 1357 <li><b>&lt;=</b>: less or equal</li>
1358 <li><b><code>&gt;=</code>: </b>greater or equal</li> 1358 <li><b>&gt;=</b>: greater or equal</li>
1359 </ul> 1359 </ul>
1360 1360
1361 <p> 1361 <p>
1362 These operators always result in <b>false</b> or <b>true</b>. 1362 These operators always result in <code>false</code> or <code>true</code>.
1363 </p> 1363 </p>
1364 1364
1365 <p> 1365 <p>
1366 Equality (<code>==</code>) first compares the type of its operands. 1366 Equality (<code>==</code>) first compares the type of its operands.
1367 If the types are different, then the result is <b>false</b>. 1367 If the types are different, then the result is <code>false</code>.
1368 Otherwise, the values of the operands are compared. 1368 Otherwise, the values of the operands are compared.
1369 Strings, numbers, and binary values are compared in the obvious way (by value). 1369 Strings, numbers, and binary values are compared in the obvious way (by value).
1370 </p> 1370 </p>
1371 1371
1372 <p> 1372 <p>
1388 </p> 1388 </p>
1389 1389
1390 <p> 1390 <p>
1391 Equality comparisons do not convert strings to numbers 1391 Equality comparisons do not convert strings to numbers
1392 or vice versa. 1392 or vice versa.
1393 Thus, <code>"0"==0</code> evaluates to <b>false</b>, 1393 Thus, <code>"0"==0</code> evaluates to <code>false</code>,
1394 and <code>t[0]</code> and <code>t["0"]</code> denote different 1394 and <code>t[0]</code> and <code>t["0"]</code> denote different
1395 entries in a table. 1395 entries in a table.
1396 </p> 1396 </p>
1397 1397
1398 <p> 1398 <p>