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libs: fix some RegExp nits #13536

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libs: fix some RegExp nits #13536

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7b2ddb4
libs: take RegExp creation out of cycles
vsemozhetbyt Jun 7, 2017
67f74d5
libs: use test(), not match() in boolean context
vsemozhetbyt Jun 7, 2017
a48371c
libs: remove redundant RegExp parts
vsemozhetbyt Jun 7, 2017
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2 changes: 1 addition & 1 deletion lib/_tls_wrap.js
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Original file line number Diff line number Diff line change
Expand Up @@ -963,7 +963,7 @@ function SNICallback(servername, callback) {
var ctx;

this.server._contexts.some(function(elem) {
if (servername.match(elem[0]) !== null) {
if (elem[0].test(servername)) {
ctx = elem[1];
return true;
}
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6 changes: 4 additions & 2 deletions lib/dns.js
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Expand Up @@ -309,21 +309,23 @@ function setServers(servers) {
// servers cares won't have any servers available for resolution
const orig = cares.getServers();
const newSet = [];
const IPv6RE = /\[(.*)\]/;
const addrSplitRE = /:\d+$/;

servers.forEach((serv) => {
var ipVersion = isIP(serv);
if (ipVersion !== 0)
return newSet.push([ipVersion, serv]);

const match = serv.match(/\[(.*)\](?::\d+)?/);
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I wonder if this was meant to be anchored, i.e. ^…$, otherwise the addition doesn’t make much sense? Anyway, your change seems correct.

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Maybe this was for some more clarity, to show the wider pattern. But this may impact performance a bit.

const match = serv.match(IPv6RE);
// we have an IPv6 in brackets
if (match) {
ipVersion = isIP(match[1]);
if (ipVersion !== 0)
return newSet.push([ipVersion, match[1]]);
}

const s = serv.split(/:\d+$/)[0];
const s = serv.split(addrSplitRE)[0];
ipVersion = isIP(s);

if (ipVersion !== 0)
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6 changes: 3 additions & 3 deletions lib/internal/cluster/master.js
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Expand Up @@ -99,14 +99,14 @@ function createWorkerProcess(id, env) {
var workerEnv = util._extend({}, process.env);
var execArgv = cluster.settings.execArgv.slice();
var debugPort = 0;
var debugArgvRE =
/^(--inspect|--inspect-(brk|port)|--debug|--debug-(brk|port))(=\d+)?$/;

util._extend(workerEnv, env);
workerEnv.NODE_UNIQUE_ID = '' + id;

for (var i = 0; i < execArgv.length; i++) {
const match = execArgv[i].match(
/^(--inspect|--inspect-(brk|port)|--debug|--debug-(brk|port))(=\d+)?$/
);
const match = execArgv[i].match(debugArgvRE);

if (match) {
if (debugPort === 0) {
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7 changes: 4 additions & 3 deletions lib/repl.js
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Original file line number Diff line number Diff line change
Expand Up @@ -754,6 +754,7 @@ function complete(line, callback) {
const exts = Object.keys(this.context.require.extensions);
var indexRe = new RegExp('^index(' + exts.map(regexpEscape).join('|') +
')$');
var versionedFileNamesRe = /-\d+\.\d+/;

completeOn = match[1];
var subdir = match[2] || '';
Expand All @@ -772,7 +773,7 @@ function complete(line, callback) {
name = files[f];
ext = path.extname(name);
base = name.slice(0, -ext.length);
if (base.match(/-\d+\.\d+(\.\d+)?/) || name === '.npm') {
if (versionedFileNamesRe.test(base) || name === '.npm') {
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same here, but I really don’t know what this code is supposed to do. :/

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@vsemozhetbyt vsemozhetbyt Jun 7, 2017 •
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Ditto about clarity/performance )

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I looked into this a bit further and this all about the npm cache itself. It is meant to prevent listing all the version folders found in the cache folder (e.g. 1.0.0 in root/.npm/foo/1.0.0/package). As far as I see it this does not check the cache folder anymore though and the windows cache folder (npm-cache instead of .npm) is not excluded either. So I think this part could be safely removed and it's a legacy remnant. I did not try it out though.

// Exclude versioned names that 'npm' installs.
continue;
}
Expand Down Expand Up @@ -816,7 +817,7 @@ function complete(line, callback) {
// spam.eggs.<|> # completions for 'spam.eggs' with filter ''
// foo<|> # all scope vars with filter 'foo'
// foo.<|> # completions for 'foo' with filter ''
} else if (line.length === 0 || line[line.length - 1].match(/\w|\.|\$/)) {
} else if (line.length === 0 || /\w|\.|\$/.test(line[line.length - 1])) {
match = simpleExpressionRE.exec(line);
if (line.length === 0 || match) {
var expr;
Expand Down Expand Up @@ -1067,7 +1068,7 @@ REPLServer.prototype.memory = function memory(cmd) {
self.lines.level.push({
line: self.lines.length - 1,
depth: depth,
isFunction: /\s*function\s*/.test(cmd)
isFunction: /\bfunction\b/.test(cmd)
});
} else if (depth < 0) {
// going... up.
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10 changes: 6 additions & 4 deletions lib/util.js
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Expand Up @@ -39,6 +39,8 @@ const inspectDefaultOptions = Object.seal({
breakLength: 60
});

const numbersOnlyRE = /^\d+$/;

var CIRCULAR_ERROR_MESSAGE;
var Debug;

Expand Down Expand Up @@ -664,7 +666,7 @@ function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
}
for (var n = 0; n < keys.length; n++) {
var key = keys[n];
if (typeof key === 'symbol' || !key.match(/^\d+$/)) {
if (typeof key === 'symbol' || !numbersOnlyRE.test(key)) {
output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
key, true));
}
Expand All @@ -683,7 +685,7 @@ function formatTypedArray(ctx, value, recurseTimes, visibleKeys, keys) {
output.push(`... ${remaining} more item${remaining > 1 ? 's' : ''}`);
}
for (const key of keys) {
if (typeof key === 'symbol' || !key.match(/^\d+$/)) {
if (typeof key === 'symbol' || !numbersOnlyRE.test(key)) {
output.push(
formatProperty(ctx, value, recurseTimes, visibleKeys, key, true));
}
Expand Down Expand Up @@ -798,11 +800,11 @@ function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
}
}
if (name === undefined) {
if (array && key.match(/^\d+$/)) {
if (array && numbersOnlyRE.test(key)) {
return str;
}
name = JSON.stringify('' + key);
if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
if (/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/.test(name)) {
name = name.substr(1, name.length - 2);
name = ctx.stylize(name, 'name');
} else {
Expand Down