complete package files

lib/index.d.ts

@@ -0,0 +1,20 @@
+interface PrefixReport {
+    [key: string]: {
+        prefix: string;
+        array: Array<string>;
+    };
+}
+interface IPrefix {
+    strs: Array<string>;
+    isPrefix(): boolean;
+    findPrefix(): string;
+    findAllPrefix(): PrefixReport;
+}
+export default class prefix implements IPrefix {
+    strs: Array<string>;
+    constructor(strs: Array<string>);
+    isPrefix(): boolean;
+    findPrefix(): string;
+    findAllPrefix(): PrefixReport;
+}
+export {};

lib/index.js

@@ -0,0 +1,61 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+class prefix {
+    constructor(strs) {
+        this.strs = strs;
+    }
+    isPrefix() {
+        let str0 = this.strs[0];
+        for (let char of this.strs) {
+            let i = 0;
+            while (str0.length > i && char[i] === str0[i]) {
+                i++;
+            }
+            str0 = str0.slice(0, i);
+        }
+        return (str0) ? true : false;
+    }
+    findPrefix() {
+        let str0 = this.strs[0];
+        for (let char of this.strs) {
+            let i = 0;
+            while (str0.length > i && char[i] === str0[i]) {
+                i++;
+            }
+            str0 = str0.slice(0, i);
+        }
+        return str0;
+    }
+    findAllPrefix() {
+        let strs = [...this.strs];
+        // sort strings by english alphabet
+        strs.sort((a, b) => a.localeCompare(b));
+        let str0 = strs[0];
+        let map = {};
+        let array = [];
+        for (let char of strs) {
+            let i = 0;
+            if (char[i] !== str0[i]) {
+                map[str0] = {
+                    prefix: str0,
+                    array: array
+                };
+                array = [];
+                str0 = char;
+                array.push(char);
+            }
+            else
+                array.push(char);
+            while (str0.length > i && char[i] === str0[i]) {
+                i++;
+            }
+            str0 = str0.slice(0, i);
+        }
+        map[str0] = {
+            prefix: str0,
+            array: array
+        };
+        return map;
+    }
+}
+exports.default = prefix;

package.json

@@ -2,11 +2,12 @@
   "name": "prefix",
   "version": "1.0.0",
   "description": "find the prefix of a array of strings",
-  "main": "index.ts",
+  "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "start": "ts-node index.ts",
-    "build": "tsc index.ts"
+    "build": "tsc"
   },
   "homepage": "https://github.com/alirezakargar1380/prefix-finder.git",
   "repository": {
@@ -20,9 +21,9 @@
   "keywords": [
     "prefix",
     "array",
-    "string"
+    "string",
+    "js"
   ],
   "author": "alireza_kargar <[email protected]>",
   "license": "ISC"
-}
-
+}

tsconfig.json

@@ -1,17 +1,15 @@
 {
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig to read more about this file */
-
     /* Projects */
     // "incremental": true,                              /* Save .tsbuildinfo files to allow for incremental compilation of projects. */
     // "composite": true,                                /* Enable constraints that allow a TypeScript project to be used with project references. */
     // "tsBuildInfoFile": "./.tsbuildinfo",              /* Specify the path to .tsbuildinfo incremental compilation file. */
     // "disableSourceOfProjectReferenceRedirect": true,  /* Disable preferring source files instead of declaration files when referencing composite projects. */
     // "disableSolutionSearching": true,                 /* Opt a project out of multi-project reference checking when editing. */
     // "disableReferencedProjectLoad": true,             /* Reduce the number of projects loaded automatically by TypeScript. */
-
     /* Language and Environment */
-    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
+    "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
     // "lib": [],                                        /* Specify a set of bundled library declaration files that describe the target runtime environment. */
     // "jsx": "preserve",                                /* Specify what JSX code is generated. */
     // "experimentalDecorators": true,                   /* Enable experimental support for TC39 stage 2 draft decorators. */
@@ -23,35 +21,30 @@
     // "noLib": true,                                    /* Disable including any library files, including the default lib.d.ts. */
     // "useDefineForClassFields": true,                  /* Emit ECMAScript-standard-compliant class fields. */
     // "moduleDetection": "auto",                        /* Control what method is used to detect module-format JS files. */
-
     /* Modules */
-    "module": "commonjs",                                /* Specify what module code is generated. */
-    "rootDir": "./",                                  /* Specify the root folder within your source files. */
+    "module": "commonjs", /* Specify what module code is generated. */
+    "rootDir": "./src",                                  /* Specify the root folder within your source files. */
     // "moduleResolution": "node",                       /* Specify how TypeScript looks up a file from a given module specifier. */
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
-    "rootDirs": [
-      "src"
-    ],                                   /* Allow multiple folders to be treated as one when resolving modules. */
+    "rootDirs": ["src/**/*.ts"],                                   /* Allow multiple folders to be treated as one when resolving modules. */
     // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
     // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
     // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */
     // "resolveJsonModule": true,                        /* Enable importing .json files. */
     // "noResolve": true,                                /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */
-
     /* JavaScript Support */
-    // "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
+    "allowJs": true,                                  /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
     // "checkJs": true,                                  /* Enable error reporting in type-checked JavaScript files. */
     // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
-
     /* Emit */
-    "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
     // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
     // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
     // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */
-    "outDir": "./lib",                                   /* Specify an output folder for all emitted files. */
+    "outDir": "./lib", /* Specify an output folder for all emitted files. */
     // "removeComments": true,                           /* Disable emitting comments. */
     // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
@@ -69,16 +62,14 @@
     // "preserveConstEnums": true,                       /* Disable erasing 'const enum' declarations in generated code. */
     // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
     // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
-
     /* Interop Constraints */
     // "isolatedModules": true,                          /* Ensure that each file can be safely transpiled without relying on other imports. */
     // "allowSyntheticDefaultImports": true,             /* Allow 'import x from y' when a module doesn't have a default export. */
-    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
+    "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
     // "preserveSymlinks": true,                         /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */
-    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */
-
+    "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */
     /* Type Checking */
-    "strict": true,                                      /* Enable all strict type-checking options. */
+    "strict": true, /* Enable all strict type-checking options. */
     // "noImplicitAny": true,                            /* Enable error reporting for expressions and declarations with an implied 'any' type. */
     // "strictNullChecks": true,                         /* When type checking, take into account 'null' and 'undefined'. */
     // "strictFunctionTypes": true,                      /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */
@@ -97,9 +88,8 @@
     // "noPropertyAccessFromIndexSignature": true,       /* Enforces using indexed accessors for keys declared using an indexed type. */
     // "allowUnusedLabels": true,                        /* Disable error reporting for unused labels. */
     // "allowUnreachableCode": true,                     /* Disable error reporting for unreachable code. */
-
     /* Completeness */
     // "skipDefaultLibCheck": true,                      /* Skip type checking .d.ts files that are included with TypeScript. */
-    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
+    "skipLibCheck": true /* Skip type checking all .d.ts files. */
   }
-}
+}