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/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/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/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 68a72c1b3..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
@@ -65,6 +66,7 @@ initializeArrayWithRange:array
 initializeArrayWithValues:array
 inRange:math
 intersection:array
+invertKeyValues:object
 isAbsoluteURL:string
 isArmstrongNumber:math
 isArray:utility
@@ -80,6 +82,7 @@ isPrimitive:utility
 isPromiseLike:utility
 isString:utility
 isSymbol:utility
+isTravisCI:node
 isValidJSON:utility
 join:array
 JSONToDate:date
@@ -159,6 +162,7 @@ truncateString:string
 truthCheckCollection:object
 unescapeHTML:string
 union:array
+untildify:node
 UUIDGeneratorBrowser:browser
 UUIDGeneratorNode:node
 validateNumber:utility