sheetjs/bits/20_jsutils.js

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function isval(x) { return x !== undefined && x !== null; }
function keys(o) { return Object.keys(o); }
function evert_key(obj, key) {
var o = [], K = keys(obj);
for(var i = 0; i !== K.length; ++i) o[obj[K[i]][key]] = K[i];
return o;
}
function evert(obj) {
var o = [], K = keys(obj);
for(var i = 0; i !== K.length; ++i) o[obj[K[i]]] = K[i];
return o;
}
function evert_num(obj) {
var o = [], K = keys(obj);
for(var i = 0; i !== K.length; ++i) o[obj[K[i]]] = parseInt(K[i],10);
return o;
}
function evert_arr(obj) {
var o = [], K = keys(obj);
for(var i = 0; i !== K.length; ++i) {
if(o[obj[K[i]]] == null) o[obj[K[i]]] = [];
o[obj[K[i]]].push(K[i]);
}
return o;
}
/* TODO: date1904 logic */
function datenum(v, date1904) {
if(date1904) v+=1462;
var epoch = Date.parse(v);
return (epoch + 2209161600000) / (24 * 60 * 60 * 1000);
}
function cc2str(arr) {
var o = "";
for(var i = 0; i != arr.length; ++i) o += String.fromCharCode(arr[i]);
return o;
}