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qwen/nodejs/node_modules/lodash/padStart.js

@@ -0,0 +1,39 @@
+var createPadding = require('./_createPadding'),
+    stringSize = require('./_stringSize'),
+    toInteger = require('./toInteger'),
+    toString = require('./toString');
+
+/**
+ * Pads `string` on the left side if it's shorter than `length`. Padding
+ * characters are truncated if they exceed `length`.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category String
+ * @param {string} [string=''] The string to pad.
+ * @param {number} [length=0] The padding length.
+ * @param {string} [chars=' '] The string used as padding.
+ * @returns {string} Returns the padded string.
+ * @example
+ *
+ * _.padStart('abc', 6);
+ * // => '   abc'
+ *
+ * _.padStart('abc', 6, '_-');
+ * // => '_-_abc'
+ *
+ * _.padStart('abc', 3);
+ * // => 'abc'
+ */
+function padStart(string, length, chars) {
+  string = toString(string);
+  length = toInteger(length);
+
+  var strLength = length ? stringSize(string) : 0;
+  return (length && strLength < length)
+    ? (createPadding(length - strLength, chars) + string)
+    : string;
+}
+
+module.exports = padStart;