README
n_
Node.js REPL with lodash
Why?
Sometimes we use the Node.js REPL interface to experiment with code. Wouldn’t it be great to have that interface with lodash required by default?
Installation
$ npm install -g n_
Usage
$ n_
n_ >
lodash is now attached to the REPL context as _
, so just use it:
n_ > _.compact([0, 1, false, 2, '', 3]);
[ 1, 2, 3 ]
n_ >
FP mode
It is possible to use lodash’s functional programming variant lodash/fp
:
$ n_ --fp
n_ > _.map(function(v) { return v * 2; }, [1, 2, 3]);
[ 2, 4, 6 ]
n_ >
Strict mode
It is possible to enable strict mode in Node.js >= 4.x:
$ n_ --use_strict
n_ >
Repl specificities
Commands
Some commands are available to facilitate some operations, and are host under .lodash
repl command:
.lodash fp
: switch to lodash/fp.lodash vanilla
: switch to vanilla lodash mode.lodash reset
: switch to initial lodash mode.lodash swap
: switch to the other lodash mode (vanilla/fp).lodash current
: output current lodash flavor in use.lodash version
: output lodash version in use
and the .lodash help
to have more details about lodash repl commands
as last evaluated expression __
Special character _
refer to the lodash instance, and cannot hold value of last expression.
To provide the same feature, __
was introduced:
n_ > 10 + 2
12
n_ > 'number '+ __
'number 12'
Configuration options
Aside --fp
and --use_strict
/--use-strict
, some other options are available either as CLI flags, or via environment variables.(with a trailing _N_
)
The two main feature you can control is History persistance and Prompt Theme.
| Flag | aliases|Env variable| Description|Default
|-|-|--|-|-|
|--history-path
|--history
, history-file
|_N_HISTORY_PATH
|Location of repl history file|~/.n_repl_history
|
|--prompt.symbol
||_N_PROMPT__SYMBOL
|Symbol to use as $
prompt|>
|
|--prompt.name
||_N_PROMPT__NAME
|Name for the prompt |n_
|
|--prompt.color.name
||_N_PROMPT__COLOR__NAME
|Color for prompt name n_
|blue
|
|--prompt.color.symbol
||_N_PROMPT__COLOR__SYMBOL
|Color for prompt symbol|red
|
|--prompt.color.flavor
||_N_PROMPT__COLOR__FLAVOR
|Color for section of prompt about lodash flavor in use|cyan
|
|--prompt.color.help
||_N_PROMPT__COLOR__HELP
|Color for section of prompt about lodash flavor in use|green
|
About styling, valid colors are: black
, red
, green
, yellow
, blue
, magenta
, cyan
, white
,gray
, and dim
.
Enjoy! :rocket: