const _ = require('lodash')
const values = [
null,
undefined,
'11text',
'null',
'NaN',
'Infinity',
'',
'19.5',
]
values.forEach((value) => {
console.log(`_.toInteger(${JSON.stringify(value)}):`, _.toInteger(value))
console.log(`_.toNumber(${JSON.stringify(value)}):`, _.toNumber(value))
console.log(`parseInt(${JSON.stringify(value)}):`, parseInt(value))
console.log(`\n`)
})
Results:
_.toInteger(null): 0
_.toNumber(null): 0
parseInt(null): NaN
_.toInteger(undefined): 0
_.toNumber(undefined): NaN
parseInt(undefined): NaN
_.toInteger("11text"): 0
_.toNumber("11text"): NaN
parseInt("11text"): 11
_.toInteger("null"): 0
_.toNumber("null"): NaN
parseInt("null"): NaN
_.toInteger("NaN"): 0
_.toNumber("NaN"): NaN
parseInt("NaN"): NaN
_.toInteger("Infinity"): 1.7976931348623157e+308
_.toNumber("Infinity"): Infinity
parseInt("Infinity"): NaN
_.toInteger(""): 0
_.toNumber(""): 0
parseInt(""): NaN
_.toInteger("19.5"): 19
_.toNumber("19.5"): 19.5
parseInt("19.5"): 19
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