Align columns: Difference between revisions
→{{header|JavaScript}}
(Kotlin version enhanced) |
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=={{header|JavaScript}}==
===Imperative===
<lang JavaScript>
var justification="center",
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document.write(input);</lang>
===
<lang JavaScript>//break up each string by '$'. The assumption is that the user wants the trailing $.
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return zip(formattedCols).map(function (row) { return row.join(' '); }).join('\n');
};</lang>
Or:
<lang JavaScript>(function (lines) {
var LEFT = 0,
CENTRE = 1,
RIGHT = 2;
return alignedTable(
lines.map(function (s) {
return s.split('$');
}),
2, // minimum gap between cols
LEFT // [LEFT|CENTRE|RIGHT] or [0|1|2]
)
// TABULATION OF RESULTS IN SPACED AND ALIGNED COLUMNS
// [s] -> n -> enum -> s
function alignedTable(lstRows, lngPad, iAlignment) {
// Max width of each column
var lstColWidths = range(0, lstRows.reduce(function (a, x) {
return x.length > a ? x.length : a;
}, 0) - 1).map(function (iCol) {
return lstRows.reduce(function (a, lst) {
var w = lst[iCol] ? lst[iCol].toString().length : 0;
return (w > a) ? w : a;
}, 0);
});
// Rows padded to equal width
return lstRows.map(function (lstRow) {
return lstRow.map(function (v, i) {
return align(v, lstColWidths[i] + lngPad, iAlignment);
}).join('')
}).join('\n');
}
// Text padded to left and/or right: aligned (left|centre|right)
// String, number of characters, alignment 0|1|2
// s -> n -> enum -> s
function align(s, n, a) {
var mid = (1 === a),
gap = n - s.length,
pad = Array(Math.floor((gap + 1) / (mid ? 2 : 1))).join(' ');
return (a ? pad + (!mid || gap % 2 ? '' : ' ') : '') + s +
(2 > a ? pad + (mid ? ' ' : '') : '');
}
// [m..n]
function range(m, n) {
return Array.apply(null, Array(n - m + 1)).map(function (x, i) {
return m + i;
});
}
})([
"Given$a$text$file$of$many$lines,$where$fields$within$a$line$",
"are$delineated$by$a$single$'dollar'$character,$write$a$program",
"that$aligns$each$column$of$fields$by$ensuring$that$words$in$each$",
"column$are$separated$by$at$least$one$space.",
"Further,$allow$for$each$word$in$a$column$to$be$either$left$",
"justified,$right$justified,$or$center$justified$within$its$column."
]);</lang>
{{Out}}
<pre>Given a text file of many lines, where fields within a line
are delineated by a single 'dollar' character, write a program
that aligns each column of fields by ensuring that words in each
column are separated by at least one space.
Further, allow for each word in a column to be either left
justified, right justified, or center justified within its column. </pre>
=={{header|jq}}==
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