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https://github.com/bergant/jsondiff
Compare R Objects as JSONs
https://github.com/bergant/jsondiff
diff htmlwidgets json r
Last synced: 3 months ago
JSON representation
Compare R Objects as JSONs
- Host: GitHub
- URL: https://github.com/bergant/jsondiff
- Owner: bergant
- License: other
- Created: 2017-10-04T16:12:55.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2017-10-05T11:28:50.000Z (about 7 years ago)
- Last Synced: 2024-01-28T23:08:24.026Z (9 months ago)
- Topics: diff, htmlwidgets, json, r
- Language: R
- Size: 79.1 KB
- Stars: 8
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.Rmd
- License: LICENSE
Awesome Lists containing this project
- awesome-shiny-extensions - jsondiff - R interface to jsondiffpatch for comparing R objects as JSONs. (UI Components / Code Diff)
- jimsghstars - bergant/jsondiff - Compare R Objects as JSONs (R)
README
---
output:
html_document:
keep_md: yes
self_contained: no
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE, screenshot.force = TRUE, fig.path = "img/fig-")
```
# jsondiff
[](https://travis-ci.org/bergant/jsondiff)
## Overview
**jsondiff** finds and renders difference in values between JSONs. Diffing R
objects (like lists and dataframes) is also supported by automatic conversion
to JSON. It is implemented as an R interface to
[jsondiffpatch](https://github.com/benjamine/jsondiffpatch), powered by
[htmlwidgets](http://www.htmlwidgets.org/) framework.
## Installation
```{r, eval=FALSE}
devtools::install_github("bergant/jsondiff")
```
## Usage
Compare two lists:
```{r list, fig.height=1.5}
x <- list(
name = "Pluto", orbital_speed_kms = 4.7, category = "planet",
composition = c("methane", "nitrogen")
)
y <- list(
name = "Pluto", category = "dwarf planet", orbital_speed_kms = 4.7,
composition = c("nitrogen", "methane", "carbon monoxide")
)
library(jsondiff)
jsondiff(x, y)
```
Show also unchanged data:
```{r list_unchanged, fig.height=1.5}
jsondiff(x, y, hide_unchanged = FALSE)
```
Character vectors of size 1 are evaluated as JSONs:
```{r json, fig.height=1.5}
library(jsonlite)
json_x <- toJSON(x)
json_y <- toJSON(y)
jsondiff(json_x, json_y)
```
Data frames (example is from
[daff](https://github.com/edwindj/daff) package, which is probably a better
choice to handle difference between data frames than **jsondiff**):
```{r dataframe, fig.height=3}
x <- y <- iris[1:3,]
x <- head(x,2) # remove a row
x[1,1] <- 10 # change a value
x$hello <- "world" # add a column
x$Species <- NULL # remove a column
jsondiff(y, x)
```
Note that there are several options when converting R objects to JSON. Instead
of using `toJSON` explicitly, one can use `json_options`. For example,
converting from data frame to JSON as "column first":
```{r dataframe_cols, fig.height=3}
jsondiff(y, x, json_opt = json_options(dataframe = "columns", factor = "string"))
```
## Related projects
Made possible by:
- [jsondiffpatch](https://github.com/benjamine/jsondiffpatch) - Diffing and patching JSONs (JavaScript library)
- [htmlwidgets](https://github.com/ramnathv/htmlwidgets) - Framework for easily creating R bindings to JavaScript libraries
- [jsonlite](https://github.com/jeroen/jsonlite) - A Robust, High Performance JSON Parser and Generator for R
See also:
- [Daff](https://github.com/edwindj/daff) - Diff, patch and merge for data.frames
- [listviewer](https://github.com/timelyportfolio/listviewer) - R htmlwidget to view lists
- [diffobj](https://github.com/brodieG/diffobj) - Compare R Objects with a Diff
- [tools::Rdiff](https://stat.ethz.ch/R-manual/R-devel/library/tools/html/Rdiff.html): Difference R Output Files
## License
MIT