boilerplate 6 built-in library function add

Author: Samiur-SiliconOrchard

src/lib/arrayToCommaSeparatedText.js

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+const arrayToCommaSeparatedText = (array) => (array ?
+  array
+    .map((item) => item)
+    .join(', ')
+    .toString() :
+  'None');
+
+export default arrayToCommaSeparatedText;

src/lib/downloadString.js

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+const downloadString = (data, filename, ext) => {
+  const dataStr = `data:text/json;charset=utf-8,${encodeURIComponent(data)}`;
+  const downloadAnchorNode = document.createElement('a');
+
+  downloadAnchorNode.setAttribute('href', dataStr);
+  downloadAnchorNode.setAttribute('download', `${filename}.${ext}`);
+
+  document.body.appendChild(downloadAnchorNode); // required for firefox
+
+  downloadAnchorNode.click();
+  downloadAnchorNode.remove();
+};
+
+export default downloadString;

src/lib/internationalCurrencyConvert.js

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+function convertToInternationalCurrencySystem(labelValue) {
+  // Nine Zeroes for Billions
+  return Math.abs(Number(labelValue)) >= 1.0e9 ?
+    `${(Math.abs(Number(labelValue)) / 1.0e9).toFixed(0)} B` : // Six Zeroes for Millions
+    Math.abs(Number(labelValue)) >= 1.0e6 ?
+      `${(Math.abs(Number(labelValue)) / 1.0e6).toFixed(0)} M` : // Three Zeroes for Thousands
+      Math.abs(Number(labelValue)) >= 1.0e3 ?
+        `${(Math.abs(Number(labelValue)) / 1.0e3).toFixed(0)} K` :
+        Math.abs(Number(labelValue));
+}
+
+export default convertToInternationalCurrencySystem;

src/lib/isEmptyObject.js

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+/* eslint-disable no-restricted-syntax */
+function isEmptyObject(obj) {
+  let name;
+  for (name in obj) {
+    if (obj.hasOwnProperty(name)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+export default isEmptyObject;

src/lib/truncateString.js

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+function truncateString(str, max, sep) {
+  // Default to 10 characters
+  max = max || 10;
+
+  const len = str.length;
+  if (len > max) {
+    // Default to ellipsis
+    sep = sep || '...';
+
+    const sepLen = sep.length;
+
+    // If separator is larger than character limit,
+    // well then we don't want to just show the separator,
+    // so just show right hand side of the string.
+    if (sepLen > max) {
+      return str.substr(len - max);
+    }
+
+    // Half the difference between max and string length.
+    // Multiply negative because small minus big.
+    // Must account for length of separator too.
+    const n = -0.5 * (max - len - sepLen);
+
+    // This gives us the centerline.
+    const center = len / 2;
+
+    const front = str.substr(0, center - n);
+    const back = str.substr(len - center + n); // without second arg, will automatically go to end of line.
+
+    return front + sep + back;
+  }
+
+  return str;
+}
+
+export default truncateString;

src/lib/waitSomeMoment.js

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+function wait(ms) {
+  const start = new Date().getTime();
+  let end = start;
+
+  while (end < start + ms) {
+    end = new Date().getTime();
+  }
+}
+
+export default wait;