The first sheet gives some examples of recursive Lambda functions.
The second sheet and the third sheet give two more complicated examples.
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Recursive: {
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1: { 1: "Examples" },
3: { 1: "Example 1: Compute a factorial" },
4: { 1: "Define the following in Name Manager:" },
5: { 1: "Name:", 2: "myFact" },
6: { 1: "Scope:", 2: "Workbook" },
7: { 1: "Comment:", 2: "Computes the factorial of a number" },
8: {
1: "Refers To:",
2: "=LAMBDA(num,\r\n IF(num<2,\r\n 1,\r\n num * myFact(num - 1)\r\n )\r\n)",
},
14: { 1: "Data", 2: "Formula", 3: "Result" },
15: { 1: 4 },
16: { 1: 16 },
17: { 1: 52 },
19: { 1: "Example 2: Replace characters in a string" },
20: { 1: "Define the following in Name Manager:" },
21: { 1: "Name:", 2: "ReplaceChars" },
22: { 1: "Scope:", 2: "Workbook" },
23: { 1: "Comment:", 2: "Replaces the specified characters in a string" },
24: {
1: "Refers To:",
2: '=LAMBDA(str, chars, sub\r\n IF(chars="",\r\n str,\r\n ReplaceChars(\r\n SUBSTITUTE(str, LEFT(chars), sub),\r\n MID(chars,2,LEN(chars) - 1),\r\n sub\r\n )\r\n )\r\n)',
},
34: { 1: "Data", 2: "Formula", 3: "Result" },
35: { 1: "WARNING!! <script>" },
36: { 1: "#4 & #7 + $803*" },
37: { 1: "Generally (#25) free" },
39: { 1: "Example 3: Reverse a string value" },
40: { 1: "3a. Define the following in Name Manager:" },
41: { 1: "Name:", 2: "HEAD" },
42: { 1: "Scope:", 2: "Workbook" },
43: { 1: "Comment:", 2: "Returns the first character of a string" },
44: {
1: "Refers To:",
2: '=LAMBDA(str,\r\n IF(str="",\r\n "",\r\n LEFT(str, 1)\r\n )\r\n)',
},
50: { 1: "3b. Define the following in Name Manager:" },
51: { 1: "Name:", 2: "TAIL" },
52: { 1: "Scope:", 2: "Workbook" },
53: { 1: "Comment:", 2: "Returns the string minus the 1st char" },
54: {
1: "Refers To:",
2: '=LAMBDA(str,\r\n IF(str="",\r\n "",\r\n RIGHT(str, LEN(str) - 1)\r\n )\r\n)',
},
60: { 1: "3c. Define the following in Name Manager:" },
61: { 1: "Name:", 2: "REVERSE" },
62: { 1: "Scope:", 2: "Workbook" },
63: { 1: "Comment:", 2: "Returns the string in reverse order" },
64: {
1: "Refers To:",
2: "=LAMBDA(str,\r\n IF(LEN(str)<2,\r\n str,\r\n REVERSE(TAIL(str)) & HEAD(str)\r\n )\r\n)",
},
70: { 1: "Data", 2: "Formula", 3: "Result" },
71: { 1: "palindrome" },
72: { 1: "backwards" },
73: { 1: "forwards" },
75: { 1: "Example 4: Check whether a string is a palindrome" },
76: { 1: "Define the following in Name Manager:" },
77: { 1: "Name:", 2: "IsPalindrome" },
78: { 1: "Scope:", 2: "Workbook" },
79: { 1: "Comment:", 2: "Returns TRUE if the string is a palindrome" },
80: {
1: "Refers To:",
2: '=LAMBDA(str, \r\n LET(\r\n replaceStr, ReplaceChars(str, "!@#$%^&*()[]<>-?.,\'"" ", ""),\r\n lowStr, LOWER(replaceStr),\r\n lowStr = REVERSE(lowStr)\r\n )\r\n)',
},
87: { 1: "Data", 2: "Formula", 3: "Result" },
88: { 1: "I, man, am Regal, a German am I" },
89: { 1: "Never odd or even" },
90: { 1: "If I had a Hi-Fi" },
91: { 1: "Madam, I'm Adam" },
92: { 1: "Too hot to hoot" },
93: { 1: "No lemons, no melon" },
94: { 1: "Too bad I hid a boot" },
95: { 1: "Lisa Bonet ate no basil" },
96: { 1: "Warsaw was raw" },
97: { 1: "Was it a car or a cat I saw?" },
},
formulas: {
15: { 2: "FORMULATEXT(D16)", 3: "MYFACT(B16)" },
16: { 2: "FORMULATEXT(D17)", 3: "MYFACT(B17)" },
17: { 2: "FORMULATEXT(D18)", 3: "MYFACT(B18)" },
35: { 2: "FORMULATEXT(D36)", 3: 'REPLACECHARS(B36,"!@#$%^&*()[]<>-?.,","")' },
36: { 2: "FORMULATEXT(D37)", 3: 'REPLACECHARS(B37,"!@#$%^&*()[]<>-?.,","")' },
37: { 2: "FORMULATEXT(D38)", 3: 'REPLACECHARS(B38,"!@#$%^&*()[]<>-?.,","")' },
71: { 2: "FORMULATEXT(D72)", 3: "REVERSE(B72)" },
72: { 2: "FORMULATEXT(D73)", 3: "REVERSE(B73)" },
73: { 2: "FORMULATEXT(D74)", 3: "REVERSE(B74)" },
88: { 2: "FORMULATEXT(D89)", 3: "ISPALINDROME(B89)" },
89: { 2: "FORMULATEXT(D90)", 3: "ISPALINDROME(B90)" },
90: { 2: "FORMULATEXT(D91)", 3: "ISPALINDROME(B91)" },
91: { 2: "FORMULATEXT(D92)", 3: "ISPALINDROME(B92)" },
92: { 2: "FORMULATEXT(D93)", 3: "ISPALINDROME(B93)" },
93: { 2: "FORMULATEXT(D94)", 3: "ISPALINDROME(B94)" },
94: { 2: "FORMULATEXT(D95)", 3: "ISPALINDROME(B95)" },
95: { 2: "FORMULATEXT(D96)", 3: "ISPALINDROME(B96)" },
96: { 2: "FORMULATEXT(D97)", 3: "ISPALINDROME(B97)" },
97: { 2: "FORMULATEXT(D98)", 3: "ISPALINDROME(B98)" },
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Calendar: {
values: {
0: { 1: "Calendar Function" },
2: { 1: "This example LAMBDA function generates a calendar in a range of cells from a serial date." },
5: { 1: "Calendar Syntax:" },
6: { 1: "=CALENDAR(serial, mark)" },
7: { 1: "serial: The serial date value around which the calendar is generated." },
8: { 1: 'mark: True to mark the serial date value with "X" and false otherwise.' },
10: { 1: "This example LAMBDA function is complicated and requires some predefined names:" },
12: { 1: "Name:", 2: "months" },
13: {
1: "Refers To:",
2: '={"Jan";"Feb";"Mar";"Apr";"May";"Jun";"Jul";"Aug";"Sep";"Oct";"Nov";"Dec"}',
},
15: { 1: "Name:", 2: "days" },
16: { 1: "Refers To:", 2: '={"Mon";"Tue";"Wed";"Thu";"Fri";"Sat";"Sun"}' },
18: { 1: "Name:", 2: "getDay" },
19: { 1: "Scope:", 2: "Workbook" },
20: { 1: "Comment:", 2: "Gets the day of the week as text for a serial date." },
21: { 1: "Refers To:", 2: "=LAMBDA(serial, INDEX(days, WEEKDAY(serial, 2),1))" },
23: { 1: "Name:", 2: "vcat" },
24: { 1: "Scope:", 2: "Workbook" },
25: {
1: "Comment:",
2: "Concatenates two arrays together into one array by stacking them one on top of the other.",
},
27: {
1: "Refers To:",
2: "=LAMBDA(top,bot,\r\n LET(width, MIN(COLUMNS(top), COLUMNS(bot)),\r\n topH, ROWS(top),\r\n arrayMAKE(ROWS(bot)+topH, width,\r\n LAMBDA(i,j,\r\n IF(i <= topH,\r\n INDEX(top, i, j),\r\n INDEX(bot, i-topH, j)\r\n )\r\n )\r\n )\r\n )\r\n)",
},
41: { 1: "LAMBDA Implementation" },
42: { 1: "Define the following in Name Manager:" },
43: { 1: "Name:", 2: "Calendar" },
44: { 1: "Scope:", 2: "Workbook" },
45: { 1: "Comment:", 2: "Generates a calendar in a range of cells from a serial date." },
46: {
1: "Refers To:",
2: '=LAMBDA(serial, mark,\r\n LET(daysInMonth, EOMONTH(serial, 0)-EOMONTH(serial, -1),\r\n foMonth, DATE(YEAR(serial), MONTH(serial), 1),\r\n dayPadding, WEEKDAY(foMonth, 2)-1,\r\n calendarRows, ROUNDUP((dayPadding+daysInMonth)/7, 0),\r\n body, arrayMAKE(calendarRows, 7,\r\n LAMBDA(i, j,\r\n LET(seqNum, ((i-1)*7+j)-dayPadding,\r\n IFS(seqNum<=0, "",\r\n seqNum=DAY(serial), IF(mark, "X", seqNum),\r\n seqNum<=daysInMonth, seqNum,\r\n TRUE, ""\r\n )\r\n )\r\n )\r\n ),\r\n vcat(\r\n arrayMAKE(1, 7,\r\n LAMBDA(i, j,\r\n IF(j=1,\r\n INDEX(months, MONTH(serial)),\r\n IF(j=2,\r\n YEAR(serial), \r\n ""\r\n )\r\n )\r\n )\r\n ),\r\n arrayMAKE(calendarRows+1, 7,\r\n LAMBDA(i, j,\r\n IF(i=1,\r\n INDEX(days, j, 1), \r\n INDEX(body, i-1, j)\r\n )\r\n )\r\n )\r\n)))',
},
84: { 1: "Example" },
85: { 1: "Date:", 2: "2021-12-31T16:00:00.000Z", 4: "Formula:" },
86: {
1: "Mark:",
2: false,
4: "Result:"
}
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NiceAxis: {
values: {
0: { 1: "NiceAxis Function" },
2: {
1: "This example LAMBDA function computes nice axis bounds and increment values from given min and max of values to be charted.",
},
5: { 1: "NiceAxis Syntax:" },
6: { 1: "=NiceAxis(min, max)" },
7: { 1: "min: The minimum value of the data to be charted." },
8: { 1: "max: The maximum value of the data to be charted." },
10: { 1: "LAMBDA Implementation" },
11: { 1: "Define the following in Name Manager:" },
12: { 1: "Name:", 2: "Calendar" },
13: { 1: "Scope:", 2: "Workbook" },
14: { 1: "Comment:", 2: "Computes nice axis bounds and increment values for a chart" },
15: {
1: "Refers To:",
2: "=LAMBDA(min_0,max_0,\r\n LET(\r\n min_1,MIN(min_0,max_0),\r\n max_1,MAX(min_0,max_0),\r\n delta,IF(min_1=max_1,9,max_1-min_1),\r\n min_2,\r\n IF(min_1=0,\r\n 0,\r\n IF(min_1>0,\r\n MAX(0,min_1-delta/100),\r\n min_1-delta/100\r\n )\r\n ),\r\n max_2,\r\n IF(max_1=0,\r\n IF(min_1=0,1,0),\r\n IF(max_1<0,\r\n MIN(0,max_1+delta/100),\r\n max_1+delta/100\r\n )\r\n ),\r\n power,LOG10(max_2-min_2),\r\n factor,10^(power-INT(power)),\r\n major_3,\r\n XLOOKUP(\r\n factor,\r\n {0,2.1,5,10},\r\n {0.2,0.5,1,2},,\r\n -1\r\n )*10^INT(power),\r\n min_3,major_3*INT(min_2/major_3),\r\n max_3,\r\n major_3*\r\n IF(max_2/major_3=INT(max_2/major_3),\r\n max_2/major_3,\r\n INT(max_2/major_3)+1\r\n ),\r\n CHOOSE({1;2;3},min_3,max_3,major_3)\r\n )\r\n)",
},
56: { 1: "Example" },
57: { 1: "Data", 3: "Formula:" },
58: { 1: 12.5, 3: "Nice Min" },
59: { 1: 23.6, 3: "Nice Max" },
60: { 1: 22.8, 3: "Nice Inc" },
61: { 1: 38.3 },
62: { 1: 92.6 },
63: { 1: 37.8 },
64: { 1: 42.9 },
65: { 1: 83.7 },
66: { 1: 16.9 },
67: { 1: 44.8 },
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formulas: { 57: { 4: "FORMULATEXT(E59)" }, 58: { 4: "NICEAXIS(MIN(B59:B68),MAX(B59:B68))" } },
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fonts: ["700 24px Calibri", "700 14.7px Calibri", "700 17.3px Calibri"],
},
others: {
columnWidth: { 0: 36, 1: 86, 6: 130 },
rowHeight: { 0: 31, 10: 24, 11: 21, 56: 24, 57: 21 },
spans: ["B3:H4", "B16:B55", "C16:G55", "C13:G13", "C14:G14", "C15:G15"],
},
},
customNames: {
arrayMAKE: "LAMBDA(r,c,f, LET(seq, SEQUENCE(r,c), IF(seq, LET(i, ROUNDDOWN((seq-1)/c, 0)+1, j, MOD(seq-1,c)+1, f(i,j)))))",
Calendar:
'LAMBDA(serial,mark, LET(daysInMonth, EOMONTH(serial, 0)-EOMONTH(serial, -1), foMonth, DATE(YEAR(serial), MONTH(serial), 1), dayPadding, WEEKDAY(foMonth, 2)-1, calendarRows, ROUNDUP((dayPadding+daysInMonth)/7, 0), body, arrayMAKE(calendarRows, 7, LAMBDA(i,j, LET(seqNum, ((i-1)*7+j)-dayPadding, IFS(seqNum<=0, "", seqNum=DAY(serial), IF(mark, "X", seqNum), seqNum<=daysInMonth, seqNum, TRUE, "" ) ) ) ), vcat( arrayMAKE(1, 7, LAMBDA(i,j, IF(j=1, INDEX(months, MONTH(serial)), IF(j=2, YEAR(serial), "" ) ) ) ), arrayMAKE(calendarRows+1, 7, LAMBDA(i,j, IF(i=1, INDEX(days, j, 1), INDEX(body, i-1, j) ) ) ) )))',
days: '{"Mon";"Tue";"Wed";"Thu";"Fri";"Sat";"Sun"}',
getDay: "LAMBDA(serial, INDEX(days, WEEKDAY(serial, 2), 1))",
HEAD: 'LAMBDA(str, IF(str="", "", LEFT(str,1)))',
IsPalindrome: 'LAMBDA(str, LET( replaceStr, ReplaceChars(str, "!@#$%^&*()[]<>-?.,\'"" ", ""), lowStr, LOWER(replaceStr), lowStr = REVERSE(lowStr) ) )',
months: '{"Jan";"Feb";"Mar";"Apr";"May";"Jun";"Jul";"Aug";"Sep";"Oct";"Nov";"Dec"}',
myFact: "LAMBDA(num, IF(num<2, 1, num * myFact(num - 1) ) )",
NiceAxis:
"LAMBDA(min_0,max_0, LET( min_1,MIN(min_0,max_0), max_1,MAX(min_0,max_0), delta,IF(min_1=max_1,9,max_1-min_1), min_2, IF(min_1=0, 0, IF(min_1>0, MAX(0,min_1-delta/100), min_1-delta/100 ) ), max_2, IF(max_1=0, IF(min_1=0,1,0), IF(max_1<0, MIN(0,max_1+delta/100), max_1+delta/100 ) ), power,LOG10(max_2-min_2), factor,10^(power-INT(power)), major_3, XLOOKUP( factor, {0,2.1,5,10}, {0.2,0.5,1,2},, -1 )*10^INT(power), min_3,major_3*INT(min_2/major_3), max_3, major_3* IF(max_2/major_3=INT(max_2/major_3), max_2/major_3, INT(max_2/major_3)+1 ), CHOOSE({1;2;3},min_3,max_3,major_3) ) )",
ReplaceChars: 'LAMBDA(str,chars,sub, IF(chars="", str, ReplaceChars( SUBSTITUTE(str, LEFT(chars), sub), MID(chars,2,LEN(chars) - 1), sub ) ) )',
REVERSE: "LAMBDA(str, IF(LEN(str)<2, str, REVERSE(TAIL(str)) & HEAD(str) ) )",
TAIL: 'LAMBDA(str, IF(str="", "", RIGHT(str, LEN(str) - 1)))',
vcat: "LAMBDA(top,bot, LET(width, MIN(COLUMNS(top), COLUMNS(bot)), topH, ROWS(top), arrayMAKE(ROWS(bot)+topH, width, LAMBDA(i,j, IF(i <= topH, INDEX(top, i, j), INDEX(bot, i-topH, j) ) ) ) ) )",
},
};
window.onload = function () {
var workbook = new GC.Spread.Sheets.Workbook(document.getElementById("ss"));
workbook.options.allowDynamicArray = true;
workbook.suspendPaint();
// add custom name
foreachObj(data.customNames, function (name, formula) {
workbook.addCustomName(name, formula);
});
workbook.setSheetCount(3);
workbook.sheets[0].name("Recursive");
workbook.sheets[1].name("Calendar");
workbook.sheets[2].name("NiceAxis");
initSheet(workbook.getSheet(0), data.Recursive);
initSheet(workbook.getSheet(1), data.Calendar);
initSheet(workbook.getSheet(2), data.NiceAxis);
workbook.getSheet(1).setValue(85, 2, new Date(2022, 0, 1));
workbook.resumePaint();
};
function initSheet(sheet, data) {
setSheetPr(sheet, data);
setCells(sheet, data);
}
function setCells(sheet, data) {
foreachObj(data.values, function (r, row) {
foreachObj(row, function (c, v) {
setValue(sheet, Number(r), Number(c), v);
});
});
foreachObj(data.formulas, function (r, row) {
foreachObj(row, function (c, v) {
setFormula(sheet, Number(r), Number(c), v);
});
});
foreachObj(data.cellStyles, function (ref, id) {
setStyle(sheet, ref, data.styles.records[id], data.styles);
});
}
function setValue(sheet, r, c, v) {
if (v === undefined || v === null) return;
sheet.setValue(r, c, v);
}
function setFormula(sheet, r, c, v) {
if (v === undefined || v === null) return;
sheet.setFormula(r, c, v);
}
function setStyle(sheet, ref, v, styles) {
if (v === undefined || v === null) return;
var range = sheet.getRange(ref);
var foreColor = styles.colors[v.foreColor];
var backColor = styles.colors[v.backColor];
var font = styles.fonts[v.font];
var wordWrap = v.wordWrap;
if (foreColor) {
range.foreColor(foreColor);
}
if (backColor) {
range.backColor(backColor);
}
if (font) {
range.font(font);
}
if (wordWrap) {
range.wordWrap(wordWrap);
}
var border = v.border || [];
var borderTop = styles.borders[border[0]];
var borderRight = styles.borders[border[1]];
var borderBottom = styles.borders[border[2]];
var borderLeft = styles.borders[border[3]];
if (borderTop) {
range.borderTop(createLineStyle(borderTop));
}
if (borderBottom) {
range.borderBottom(createLineStyle(borderBottom));
}
if (borderLeft) {
range.borderLeft(createLineStyle(borderLeft));
}
if (borderRight) {
range.borderRight(createLineStyle(borderRight));
}
}
function setSheetPr(sheet, data) {
// set column width
foreachObj(data.others.columnWidth, function (index, v) {
sheet.setColumnWidth(Number(index), v);
});
// set row height
foreachObj(data.others.rowHeight, function (index, v) {
sheet.setRowHeight(Number(index), v);
});
// set spans
var spans = data.others.spans || [];
for (var i = 0; i < spans.length; i++) {
var range = sheet.getRange(spans[i]);
sheet.addSpan(range.row, range.col, range.rowCount, range.colCount);
}
// set tables
var tables = data.others.tables || [];
for (var i = 0; i < tables.length; i++) {
var table = tables[i];
var range = sheet.getRange(table.ref);
sheet.tables.add(table.name, range.row, range.col, range.rowCount, range.colCount);
}
}
function createLineStyle(v) {
return new GC.Spread.Sheets.LineBorder(v.color, v.style);
}
function foreachObj(obj, func) {
if (!obj) return;
var keys = Object.keys(obj);
for (var i = 0; i < keys.length; i++) {
var key = keys[i];
var v = obj[key];
func(key, v);
}
}
<!doctype html>
<html style="height:100%;font-size:14px;">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="stylesheet" type="text/css" href="$DEMOROOT$/en/purejs/node_modules/@mescius/spread-sheets/styles/gc.spread.sheets.excel2013white.css">
<script src="$DEMOROOT$/en/purejs/node_modules/@mescius/spread-sheets/dist/gc.spread.sheets.all.min.js" type="text/javascript"></script>
<script src="$DEMOROOT$/spread/source/js/license.js" type="text/javascript"></script>
<script src="app.js" type="text/javascript"></script>
<link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
<div class="sample-tutorial">
<div id="ss" class="sample-spreadsheets"></div>
</div>
</body>
</html>
input[type="text"] {
width: 200px;
margin-right: 20px;
}
label {
display: inline-block;
width: 110px;
}
.sample-tutorial {
position: relative;
height: 100%;
overflow: hidden;
}
.sample-spreadsheets {
width: 100%;
height: 100%;
overflow: hidden;
float: left;
}
label {
display: block;
margin-bottom: 6px;
}
input {
padding: 4px 6px;
}
input[type=button] {
margin-top: 6px;
display: block;
width:216px;
}
body {
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
}
code {
border: 1px solid #000;
}
