Init

.editorconfig

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+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[{package.json,*.yml}]
+indent_style = space
+indent_size = 2

.gitattributes

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+* text=auto
+*.js text eol=lf

.gitignore

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+node_modules

.travis.yml

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+language: node_js
+node_js:
+  - '6'
+  - '4'

index.js

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+'use strict';
+module.exports = (tpl, data) => {
+	if (typeof tpl !== 'string') {
+		throw new TypeError(`Expected a string in the first argument, got ${typeof tpl}`);
+	}
+
+	if (typeof data !== 'object') {
+		throw new TypeError(`Expected an Object/Array in the second argument, got ${typeof data}`);
+	}
+
+	const re = /{(.*?)}/g;
+
+	return tpl.replace(re, (_, key) => {
+		let ret = data;
+
+		for (const prop of key.split('.')) {
+			ret = ret ? ret[prop] : '';
+		}
+
+		return ret || '';
+	});
+};

license

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+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

package.json

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+{
+  "name": "pupa",
+  "version": "0.0.0",
+  "description": "Simple micro templating",
+  "license": "MIT",
+  "repository": "sindresorhus/pupa",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "test": "xo && ava"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "string",
+    "formatting",
+    "template",
+    "object",
+    "format",
+    "interpolate",
+    "interpolation",
+    "templating",
+    "str",
+    "obj",
+    "tpl",
+    "expand",
+    "simple",
+    "replace",
+    "placeholders",
+    "values",
+    "fmt",
+    "transform",
+    "micro"
+  ],
+  "devDependencies": {
+    "ava": "*",
+    "xo": "*"
+  },
+  "xo": {
+    "esnext": true
+  }
+}

readme.md

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+# pupa [![Build Status](https://travis-ci.org/sindresorhus/pupa.svg?branch=master)](https://travis-ci.org/sindresorhus/pupa)
+
+> Simple micro templating
+
+Useful when all you need is to fill in some placeholders.
+
+
+## Install
+
+```
+$ npm install --save pupa
+```
+
+
+## Usage
+
+```js
+const pupa = require('pupa');
+
+pupa('The mobile number of {name} is {phone.mobile}', {
+	name: 'Sindre',
+	phone: {
+		mobile: '609 24 363'
+	}
+});
+//=> 'The mobile number of Sindre is 609 24 363'
+
+pupa('I like {0} and {1}', ['🦄', '🐮']);
+//=> 'I like 🦄 and 🐮'
+```
+
+
+## API
+
+### pupa(template, data)
+
+#### template
+
+Type: `string`
+
+Text with placeholders for `data` properties.
+
+#### data
+
+Type: `Object` `Array`
+
+Data to interpolate into `template`.
+
+
+## FAQ
+
+### What about template literals?
+
+Template literals expand on creation. This module expands the template on execution, which can be useful if either or both template and data are lazily created or user-supplied.
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)

test.js

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+import test from 'ava';
+import m from './';
+
+test(t => {
+	t.is(m('{foo}', {foo: '!'}), '!');
+	t.is(m('{foo}', {foo: 10}), '10');
+	t.is(m('{foo}{foo}', {foo: '!'}), '!!');
+	t.is(m('{foo}{bar}{foo}', {foo: '!', bar: '#'}), '!#!');
+	t.is(m('yo {foo} lol {bar} sup', {foo: '🦄', bar: '🌈'}), 'yo 🦄 lol 🌈 sup');
+
+	t.is(m('{foo}{deeply.nested.value}', {
+		foo: '!',
+		deeply: {
+			nested: {
+				value: '#'
+			}
+		}
+	}), '!#');
+
+	t.is(m('{0}{1}', ['!', '#']), '!#');
+});
+