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caltuntas/regex-replace-alt-1.js

Last active June 3, 2025 08:15
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hate-regex
Raw
regex-replace-alt-1.js
const placeHolderPattern = /#{(\w+)}/g;
const args = process.argv.slice(2);
if (args.length < 2) {
console.log('missing arguments');
process.exit(1);
}
const replacements = [
{ name: 'placeholder1', value: args[0] },
{ name: 'placeholder2', value: args[1] },
];
function replacer(match, placeHolderName) {
const replacement = replacements.find(r => r.name === placeHolderName);
if (!replacement) {
throw new Error(`Replacement for ${placeHolder} place holder does not exist.`);
}
return replacement.value || '';
}
let output = 'some text template #{placeholder1} and #{placeholder2} and some more text #{placeholder1}';
output = output.replace(placeHolderPattern, replacer);
console.log(output);
Raw
regex-replace-alt-2.js
const args = process.argv.slice(2);
if (args.length < 2) {
console.log('missing arguments');
process.exit(1);
}
const replacements = [
{ name: 'placeholder1', value: args[0] },
{ name: 'placeholder2', value: args[1] },
];
let output = 'some text template #{placeholder1} and #{placeholder2} and some more text #{placeholder1}';
replacements.forEach((item) => {
output = output.replaceAll(`#{${item.name}}`, item.value || '');
}
);
console.log(output);
Raw
regex-replace-alt-3.js
const args = process.argv.slice(2);
if (args.length < 2) {
console.log('missing arguments');
process.exit(1);
}
const replacements = [
{ name: 'placeholder1', value: args[0] },
{ name: 'placeholder2', value: args[1] },
];
let output = 'some text template #{placeholder1} and #{placeholder2} and some more text #{placeholder1}';
replacements.forEach((item) => {
const placeholder = `#{${item.name}}`;
while (output.includes(placeholder)) {
output = output.replace(placeholder, ()=>item.value || '');
}
}
);
console.log(output);
Raw
regex-replace.js
const placeHolderPattern = /#{(\w+)}/;
const allPlaceHoldersPattern = new RegExp(placeHolderPattern, 'g');
const args = process.argv.slice(2);
if (args.length < 2) {
console.log('missing arguments');
process.exit(1);
}
const replacements = [
{
name: 'placeholder1',
value: args[0]
},
{
name: 'placeholder2',
value: args[1]
},
];
let output = 'some text template #{placeholder1} and #{placeholder2} and some more text #{placeholder1}';
let matches;
do {
console.log('after replacement output=' + output);
matches = allPlaceHoldersPattern.exec(output);
if (matches) {
const placeHolder = matches[1];
const replacement = replacements.find(r => r.name === placeHolder);
if (!replacement) {
throw new Error(`Replacement for ${placeHolder} place holder does not exist.`);
}
output = output.replace(placeHolderPattern, replacement.value || '');
allPlaceHoldersPattern.lastIndex = 0;
}
} while (matches);
console.log(output);
//test comment
Raw
settings1.conf
parent {
type {
subtype TestSubType {
element TestElement {
attributes {
name testname;
description testdescription;
count 1234;
value testvalue;
}
owner person1;
}
}
subtype TestSubType2 {
element TestElement2 {
attributes {
name testname2;
description testdescription2;
count 2;
value 2
}
owner unknown;
}
}
}
}
Raw
settings2.conf
parent {
type {
subtype TestSubType {
element TestElement {
attributes {
name testname;
description testdescription;
count 1234;
value testvalue;
}
owner person1;
}
}
subtype TestSubType1 {
element TestElement1 {
attributes {
name testname1;
description testdescription1;
count 1;
value 1
}
owner person2;
}
}
subtype TestSubType2 {
element TestElement2 {
attributes {
name testname2;
description testdescription2;
count 2;
value 2
}
owner unknown;
}
}
subtype TestSubType3 {
element TestElement3 {
attributes {
name testname3;
description testdescription3;
count 3;
value 3
}
owner unknown;
}
}
subtype TestSubType3 {
element TestElement4 {
attributes {
name testname4;
description testdescription4;
count 4;
value 4
}
owner unknown;
}
}
subtype TestSubType4 {
element TestElement5 {
attributes {
name testname5;
description testdescription5;
count 5;
value 5
}
owner unknown;
}
}
subtype TestSubType5 {
element TestElement6 {
attributes {
name testname6;
description testdescription6;
count 6;
value 6
}
owner unknown;
}
}
subtype TestSubType6 {
element TestElement7 {
attributes {
name testname7;
description testdescription7;
count 7;
value 7
}
owner unknown;
}
}
subtype TestSubType7 {
element TestElement8 {
attributes {
name testname8;
description testdescription8;
count 8;
value 8
}
owner unknown;
}
}
subtype TestSubType8 {
element TestElement9 {
attributes {
name testname9;
description testdescription9;
count 9;
value 9
}
owner unknown;
}
}
subtype TestSubType9 {
element TestElement10 {
attributes {
name testname10;
description testdescription10;
count 10;
value 10
}
owner unknown;
}
}
subtype TestSubType10 {
element TestElement11 {
attributes {
name testname11;
description testdescription11;
count 11;
value 11
}
owner unknown;
}
}
}
}
Raw
validate-config-alt-1.js
const fs = require('fs');
const args = process.argv.slice(2);
if (args.length < 1) {
console.log('missing arguments');
process.exit(1);
}
const configFile = args[0];
const config = fs.readFileSync(configFile, 'utf8');
const regex = /parent\s*\{\s*type\s*\{[^{}]*subtype\s+TestSubType\s*\{[^{}]*element\s+TestElement\s*\{[^{}]*attributes\s*\{[^{}]*value\s+testvalue[^{}]*\}[^{}]*owner\s+person1/;
const match = config.match(regex);
console.log("Match:", match);
Raw
validate-config-alt-2.js
const fs = require('fs');
var RE2 = require("re2");
const args = process.argv.slice(2);
if (args.length < 1) {
console.log('missing arguments');
process.exit(1);
}
const configFile = args[0];
const config = fs.readFileSync(configFile, 'utf8');
const regex = /parent {[\s\S]*type.*[\s\S]*subtype.*[\s\S]*element.*[\s\S]*attributes.*[\s\S]*value testvalue.*[\s\S]*owner person1/;
var re = new RE2(regex);
const match = config.match(re);
console.log("Match:", match);
Raw
validate-config.js
const fs = require('fs');
const args = process.argv.slice(2);
if (args.length < 1) {
console.log('missing arguments');
process.exit(1);
}
const configFile = args[0];
const config = fs.readFileSync(configFile, 'utf8');
const regex = /parent {[\s\S]*type.*[\s\S]*subtype.*[\s\S]*element.*[\s\S]*attributes.*[\s\S]*value testvalue.*[\s\S]*owner person1/;
const match = config.match(regex);
console.log("Match:", match);
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