A software developer working on tools for API integrations. Interests: running, reading, music
Published
Edited
Jul 11, 2018
27 stars
{
const q = s => '`' + JSON.stringify(s) + '`'
const bq = s => { const j = JSON.stringify(s); return '`'+j.substr(1, j.length - 2).replace(/\\"/, '"')+'`' }
const match = (re, s) => { const m = re.exec(s); return m && m[0] }
let re1 = /[\\]./
let re2 = /\\./
const headers = ['input', bq('/[\\]./'), bq('/\\./')];
let mkd = headers.join('|') + "\n" + headers.map(s => '-').join('|') + "\n";
['abc\\\'123', "abc\\\"123", "abc"].forEach(s => {
mkd += [q(s), q(match(re1, s)), q(match(re2, s))].join('|') + "\n"
})
return md`${mkd}`
}
{
const tbl = (...header) => { return header.join('|') + "\n" + header.map(s => '-').join('|') + "\n" }
const mkd = tbl('input', bq("/[^\\']/"), bq('/[^\\"]/')) +
["a", "\\", "'", '"'].map(s => [q(s), q(match(/[^\\']/, s)), q(match(/[^\\"]/, s))].join('|')).join("\n")
return md`${mkd}`
}
escDblQuotes = s => s.replace(/\\?"/g, '\\"')
getString = s => {
const match = /'(?:\\.|[^\\'])*'|"(?:\\.|[^\\"])*"/.exec(s)
let m = match && match[0]
if (m && m[0] === "'") {
m = `"${m.substr(1, m.length - 2).replace(/\\?"/g, '\\"').replace(/\\'/g, "'")}"`
}
return m
}
identRe = /[$_A-Za-z][$_A-Za-z0-9]*/
{
const a = { foo: { bar: 'baz' }}
const b = { foo: ['baz'] }
return [a .foo .bar, a ['foo'] ['bar'], b ['foo'] [0]]
}
readSingleKey = s => {
const match = singleKeyRe.exec(s)
if (match && match.index == 0) {
let m = match[1] || match[2]
if (match[0][0] === '[') {
if (m[0] === "'") {
m = `"${m.substr(1, m.length - 2).replace(/\\?"/g, '\\"').replace(/\\'/g, "'")}"`
}
try {
m = JSON.parse(m)
} catch (e) {
m = undefined
}
}
return m
}
}
readKeys = s => {
const re = /\[\s*('(?:\\.|[^\\'])*'|"(?:\\.|[^\\"])*"|\d+)\s*\]|\.([$_A-Za-z][$_A-Za-z0-9]*)|\s+/g
let nextIndex = 0
let keys = []
let match
while (match = re.exec(s)) {
if (match.index !== nextIndex) {
break
}
let m = match[1] || match[2]
if (match[0][0] === '[') {
if (m[0] === "'") {
m = `"${m.substr(1, m.length - 2).replace(/\\?"/g, '\\"').replace(/\\'/g, "'")}"`
}
try {
m = JSON.parse(m)
} catch (e) {
m = undefined
}
}
if (m && match[0][0] === '.' || match[0][0] === '[') {
keys.push(m)
}
nextIndex = match.index + match[0].length
}
return keys
}
// index.js
function j2ref(str, startIndex = 0, matchStart = true) {
const identRe = /\s*([$_A-Za-z][$_A-Za-z0-9]*)/g
if (startIndex !== 0) {
identRe.lastIndex = startIndex
}
let identMatch = identRe.exec(str)
if (! (identMatch && identMatch[0])) {
return
}
if (matchStart && identMatch.index !== startIndex) {
return
}
const re = /\[\s*('(?:\\.|[^\\'])*'|"(?:\\.|[^\\"])*"|\d+)\s*\]|\.([$_A-Za-z][$_A-Za-z0-9]*)|\s+/g
let nextIndex = identMatch.index + identMatch[0].length
re.lastIndex = nextIndex
let keys = [identMatch[1]]
let match
while (match = re.exec(str)) {
if (match.index !== nextIndex) {
break
}
let m = match[1] || match[2]
if (match[0][0] === '[') {
if (m[0] === "'") {
m = `"${m.substr(1, m.length - 2).replace(/\\?"/g, '\\"').replace(/\\'/g, "'")}"`
}
try {
m = JSON.parse(m)
} catch (e) {
m = undefined
}
}
if (m && match[0][0] === '.' || match[0][0] === '[') {
keys.push(m)
}
nextIndex = match.index + match[0].length
}
return {
keys,
index: identMatch.index,
matched: str.substr(identMatch.index, nextIndex - identMatch.index)
}
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
