From 73b5d5c691aaaf9bd75b3635bf830d9c15a7ae25 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Jan 2018 17:28:08 +0200
Subject: [PATCH 1/4] Add isTravisCI

Checks if the current environment is Travis CI.
---
 snippets/isTravisCI.md | 13 +++++++++++++
 tag_database           |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 snippets/isTravisCI.md

diff --git a/snippets/isTravisCI.md b/snippets/isTravisCI.md
new file mode 100644
index 000000000..3bffeb110
--- /dev/null
+++ b/snippets/isTravisCI.md
@@ -0,0 +1,13 @@
+### isTravisCI
+
+Checks if the current environment is [Travis CI](https://travis-ci.org/).
+
+Checks if the current environment has the `TRAVIS` and `CI` environment variables ([reference](https://docs.travis-ci.com/user/environment-variables/#Default-Environment-Variables)).
+
+```js
+const isTravisCI = ()) => 'TRAVIS' in process.env && 'CI' in process.env;
+```
+
+```js
+isTravisCI(); // true (if code is running on Travis CI)
+```
diff --git a/tag_database b/tag_database
index 68a72c1b3..185d2ee1f 100644
--- a/tag_database
+++ b/tag_database
@@ -80,6 +80,7 @@ isPrimitive:utility
 isPromiseLike:utility
 isString:utility
 isSymbol:utility
+isTravisCI:node
 isValidJSON:utility
 join:array
 JSONToDate:date

From 61120916ded880446fa3bf9f59ae706bc0d5825e Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Jan 2018 17:33:46 +0200
Subject: [PATCH 2/4] Add invertKeyValues

Inverts the key-value pairs of an object
---
 snippets/invertKeyValues.md | 13 +++++++++++++
 tag_database                |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 snippets/invertKeyValues.md

diff --git a/snippets/invertKeyValues.md b/snippets/invertKeyValues.md
new file mode 100644
index 000000000..b3a7ce11d
--- /dev/null
+++ b/snippets/invertKeyValues.md
@@ -0,0 +1,13 @@
+### invertKeyValues
+
+Inverts the key-value pairs of an object, without mutating it.
+
+Use `Object.keys()` and `Array.reduce()` to invert the key-value pairs of an object.
+
+```js
+const invertKeyValues = obj => Object.keys(obj).reduce((acc,key) => { acc[obj[key]] = key; return acc;},{});
+```
+
+```js
+invertKeyValues({name:'John', age: 20}) // { 20: 'age', John: 'name' }
+```
diff --git a/tag_database b/tag_database
index 185d2ee1f..64503984d 100644
--- a/tag_database
+++ b/tag_database
@@ -65,6 +65,7 @@ initializeArrayWithRange:array
 initializeArrayWithValues:array
 inRange:math
 intersection:array
+invertKeyValues:object
 isAbsoluteURL:string
 isArmstrongNumber:math
 isArray:utility

From 267a3c035cb4bca9f8983cc72fc7b5a7d4142523 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Jan 2018 17:43:18 +0200
Subject: [PATCH 3/4] Add untildify

Converts a tilde path to an absolute path.
---
 snippets/untildify.md | 13 +++++++++++++
 tag_database          |  1 +
 2 files changed, 14 insertions(+)
 create mode 100644 snippets/untildify.md

diff --git a/snippets/untildify.md b/snippets/untildify.md
new file mode 100644
index 000000000..67e51efe8
--- /dev/null
+++ b/snippets/untildify.md
@@ -0,0 +1,13 @@
+### untildify
+
+Converts a tilde path to an absolute path.
+
+Use `String.replace()` with a regular expression and `OS.homedir()` to replace the `~` in the start of the path with the home directory.
+
+```js
+const untildify = str => str.replace(/^~($|\/|\\)/, `${require('os').homedir()}$1`);
+```
+
+```js
+untildify('~/node') // '/Users/aUser/node'
+```
diff --git a/tag_database b/tag_database
index 64503984d..e66052213 100644
--- a/tag_database
+++ b/tag_database
@@ -161,6 +161,7 @@ truncateString:string
 truthCheckCollection:object
 unescapeHTML:string
 union:array
+untildify:node
 UUIDGeneratorBrowser:browser
 UUIDGeneratorNode:node
 validateNumber:utility

From 995a05f47ee40c109d2e0e3be8494c729aba346a Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Mon, 1 Jan 2018 18:24:43 +0200
Subject: [PATCH 4/4] Add hasFlags

Check if the current process's arguments contain the specified flags.
---
 snippets/hasFlags.md | 21 +++++++++++++++++++++
 tag_database         |  1 +
 2 files changed, 22 insertions(+)
 create mode 100644 snippets/hasFlags.md

diff --git a/snippets/hasFlags.md b/snippets/hasFlags.md
new file mode 100644
index 000000000..124a72aac
--- /dev/null
+++ b/snippets/hasFlags.md
@@ -0,0 +1,21 @@
+### hasFlags
+
+Check if the current process's arguments contain the specified flags.
+
+Use `Array.every()` and `Array.includes()` to check if `process.argv` contains all the specified flags.
+Use a regular expression to test if the specified flags are prefixed with `-` or `--` and prefix them accordingly.
+
+```js
+const hasFlags = (...flags) =>
+  flags.every(flag => process.argv.includes(
+    /^-{1,2}/.test(flag) ? flag : '--' + flag
+  ));
+```
+
+```js
+// node myScript.js -s --test --cool=true
+hasFlags('-s'); // true
+hasFlags('test', 'cool=true'); // true
+hasFlags('--test', 'cool=true', '-s'); // true
+hasFlags('special'); // false
+```
diff --git a/tag_database b/tag_database
index e66052213..c4f3cd421 100644
--- a/tag_database
+++ b/tag_database
@@ -55,6 +55,7 @@ getURLParameters:utility
 groupBy:array
 hammingDistance:math
 hasClass:browser
+hasFlags:node
 head:array
 hexToRGB:utility
 hide:browser