upload, string extensions, lgres

lib/utility/strings.js

@@ -0,0 +1,40 @@
+function nullOrEmpty(s) {
+    return s == null || typeof s !== 'string' || s.length === 0;
+}
+
+function contains(s, key, ignoreCase) {
+    if (nullOrEmpty(s) || key == null) {
+        return false;
+    }
+    if (typeof key !== 'string') {
+        key = String(key);
+    }
+    if (ignoreCase) {
+        return s.toLowerCase().indexOf(key.toLowerCase()) >= 0;
+    }
+    return s.indexOf(key) >= 0;
+}
+
+function endsWith(s, suffix) {
+    if (nullOrEmpty(s) || nullOrEmpty(suffix)) {
+        return false;
+    }
+    return s.indexOf(suffix) === s.length - suffix.length;
+}
+
+function padStart(s, num, char) {
+    if (nullOrEmpty(s) || isNaN(num) || num <= s.length) {
+        return s;
+    }
+    if (char == null) {
+        char = ' ';
+    }
+    return char.repeat(num - s.length);
+}
+
+export {
+    nullOrEmpty,
+    contains,
+    endsWith,
+    padStart
+}