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backend/node_modules/grammex/dist/utils.js

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+/* MAIN */
+const isArray = (value) => {
+    return Array.isArray(value);
+};
+const isFunction = (value) => {
+    return typeof value === 'function';
+};
+const isFunctionNullary = (value) => {
+    return value.length === 0;
+};
+const isFunctionStrictlyNullaryOrUnary = (() => {
+    const { toString } = Function.prototype;
+    const re = /(?:^\(\s*(?:[^,.()]|\.(?!\.\.))*\s*\)\s*=>|^\s*[a-zA-Z$_][a-zA-Z0-9$_]*\s*=>)/;
+    return (value) => {
+        return (value.length === 0 || value.length === 1) && re.test(toString.call(value));
+    };
+})();
+const isNumber = (value) => {
+    return typeof value === 'number';
+};
+const isObject = (value) => {
+    return typeof value === 'object' && value !== null;
+};
+const isRegExp = (value) => {
+    return value instanceof RegExp;
+};
+const isRegExpCapturing = (() => {
+    const sourceRe = /\\\(|\((?!\?(?::|=|!|<=|<!))/;
+    return (re) => {
+        return sourceRe.test(re.source);
+    };
+})();
+const isRegExpStatic = (() => {
+    const sourceRe = /^[a-zA-Z0-9_-]+$/;
+    return (re) => {
+        return sourceRe.test(re.source) && !re.flags.includes('i');
+    };
+})();
+const isString = (value) => {
+    return typeof value === 'string';
+};
+const isUndefined = (value) => {
+    return value === undefined;
+};
+const memoize = (fn) => {
+    const cache = new Map();
+    return (arg) => {
+        const cached = cache.get(arg);
+        if (cached !== undefined)
+            return cached;
+        const value = fn(arg);
+        cache.set(arg, value);
+        return value;
+    };
+};
+/* EXPORT */
+export { isArray, isFunction, isFunctionNullary, isFunctionStrictlyNullaryOrUnary, isNumber, isObject, isRegExp, isRegExpCapturing, isRegExpStatic, isString, isUndefined, memoize };