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Commit f0551aa

Browse files
files for version 1.0
1 parent f22b9a6 commit f0551aa

14 files changed

+1248
-0
lines changed

‎Exercises.md

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‎Version_changes.md

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<br>
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### 1.0
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* First version
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const pets = /cat|dog/
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pets.test('I like cats')
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pets.test('I like dogs')
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pets.test('I like parrots')
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'catapults concatenate cat scat'.replace(/^cat|cat\b/g, 'X')
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'cat dog bee parrot fox'.replace(/cat|dog|fox/g, 'mammal')
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'red reform read arrest'.replace(/reform|rest/g, 'X')
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'red reform read arrest'.replace(/re(form|st)/g, 'X')
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'par spare part party'.replace(/\bpar\b|\bpart\b/g, 'X')
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'par spare part party'.replace(/\b(par|part)\b/g, 'X')
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'par spare part party'.replace(/\bpar(|t)\b/g, 'X')
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let words = 'lion elephant are rope not'
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words.replace(/on|ant/, 'X')
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words.replace(/ant|on/, 'X')
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let mood = 'best years'
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mood.replace(/year|years/, 'X')
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mood.replace(/years|year/, 'X')
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let sample = 'ear xerox at mare part learn eye'
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sample.replace(/ar|are|art/g, 'X')
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sample.replace(/are|ar|art/g, 'X')
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sample.replace(/are|art|ar/g, 'X')
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‎code_snippets/Anchors.js

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/^cat/.test('cater')
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/^cat/.test('concatenation')
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/^hi/.test('hi hello\ntop spot')
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/^top/.test('hi hello\ntop spot')
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/are$/.test('spare')
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/are$/.test('nearest')
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let words = ['surrender', 'unicorn', 'newer', 'door', 'empty', 'eel', 'pest']
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words.filter(w => /er$/.test(w))
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words.filter(w => /t$/.test(w))
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/^cat$/.test('cat')
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/^cat$/.test('cater')
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'live'.replace(/^/, 're')
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'send'.replace(/^/, 're')
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'cat'.replace(/$/, 'er')
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'hack'.replace(/$/, 'er')
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/^top/m.test('hi hello\ntop spot')
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/er$/m.test('spare\npar\nera\ndare')
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/^par$/m.test('spare\npar\nera\ndare')
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let items = 'catapults\nconcatenate\ncat'
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console.log(items.replace(/^/gm, '* '))
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console.log(items.replace(/$/gm, '.'))
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'1\n2\n'.replace(/^/mg, 'foo ')
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'1\n2\n'.replace(/$/mg, ' baz')
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let sample = 'par spar apparent spare part'
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sample.replace(/par/g, 'X')
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sample.replace(/\bpar/g, 'X')
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sample.replace(/par\b/g, 'X')
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sample.replace(/\bpar\b/g, 'X')
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console.log(sample.replace(/\b/g, '"').replace(//g, ','))
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'foo_baz=num1+35*42/num2'.replace(/\b/g, ' ')
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'foo_baz=num1+35*42/num2'.replace(/\b/g, ' ').trim()
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sample.replace(/\Bpar/g, 'X')
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sample.replace(/\Bpar\b/g, 'X')
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sample.replace(/par\B/g, 'X')
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sample.replace(/\Bpar\B/g, 'X')
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'copper'.replace(/\b/g, ':')
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'copper'.replace(/\B/g, ':')
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'-----hello-----'.replace(/\b/g, ' ')
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'-----hello-----'.replace(/\B/g, ' ')
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‎code_snippets/Character_class.js

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['cute', 'cat', 'cot', 'coat', 'cost'].filter(w => /c[ou]t/.test(w))
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'meeting cute boat site foot'.replace(/[aeo]+t/g, 'X')
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'Sample123string42with777numbers'.match(/[0123456789]+/g)
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'Sample123string42with777numbers'.match(/[0-9]+/g)
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'coat Bin food tar12 best'.match(/\b[a-z0-9]+\b/g)
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'coat tin food put stoop best'.match(/\b[p-z][a-z]*\b/g)
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'coat tin food put stoop best'.match(/\b[a-fp-t]+\b/g)
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'23 154 12 26 98234'.match(/\b[12][0-9]\b/g)
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'23 154 12 26 98234'.match(/\b[0-9]{3,}\b/g)
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'0501 035 154 12 26 98234'.match(/\b0*[1-9][0-9]{2,}\b/g)
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'45 349 651 593 4 204'.match(/[0-9]+/g).filter(n => n < 350)
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'45 349 651 593 4 204'.replace(/[0-9]+/g, m => m < 350 ? 0 : 1)
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'45 349 651 593 4 204'.match(/[0-9]+/g).filter(n => n >= 200 && n <= 650)
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'Sample123string42with777numbers'.match(/[^0-9]+/g)
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'foo=42; baz=123'.replace(/^[^=]+/, '')
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'foo:123:bar:baz'.replace(/^([^:]+:){2}/, '')
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'foo=42; baz=123'.replace(/=[^=]+$/, '')
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let words = ['tryst', 'fun', 'glyph', 'pity', 'why']
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words.filter(w => /^[^aeiou]+$/.test(w))
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words.filter(w => !/[aeiou]/.test(w))
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'ab-cd gh-c 12-423'.match(/\b[a-z-]{2,}\b/g)
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'ab-cd gh-c 12-423'.match(/\b[a-z\-0-9]{2,}\b/g)
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'f*(a^b) - 3*(a+b)'.match(/a[+^]b/g)
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'f*(a^b) - 3*(a+b)'.match(/a[\^+]b/g)
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'words[5] = tea'.match(/[a-z[\]0-9]+/)[0]
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console.log('5ba\\babc2'.match(/[a\\b]+/)[0])
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'Sample123string42with777numbers'.split(/\d+/)
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'sea eat car rat eel tea'.match(/\b\w/g).join('')
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'tea sea-pit sit-lean bean'.match(/[\w\s]+/g)
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'Sample123string42with777numbers'.replace(/\D+/g, '-')
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' 1..3 \v\f foo_baz 42\tzzz \r\n1-2-3 '.match(/\S+/g)
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'tac tin cat abc;tuv acute'.replace(/c.t/g, 'X')
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'breadth markedly reported overrides'.replace(/r..d/g, 'X')
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'42\t33'.replace(/2.3/, '8')
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'far feat flare fear'.replace(/e?ar/g, 'X')
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'par spare part party'.replace(/\bpart?\b/g, 'X')
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['red', 'ready', 're;d', 'redo', 'reed'].filter(w => /\bre.?d\b/.test(w))
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'par part parrot parent'.replace(/par(ro)?t/g, 'X')
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'par part parrot parent'.replace(/par(en|ro)?t/g, 'X')
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'tr tear tare steer sitaara'.replace(/ta*r/g, 'X')
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'tr tear tare steer sitaara'.replace(/t(e|a)*r/g, 'X')
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'3111111111125111142'.replace(/1*2/g, 'X')
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'3111111111125111142'.split(/1*2/)
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'3111111111125111142'.split(/1*/)
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'tr tear tare steer sitaara'.replace(/ta+r/g, 'X')
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'tr tear tare steer sitaara'.replace(/t(e|a)+r/g, 'X')
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'3111111111125111142'.replace(/1+2/g, 'X')
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'3111111111125111142'.split(/1+/)
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let demo = ['abc', 'ac', 'abbc', 'xabbbcz', 'bc', 'abbbbbc']
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demo.filter(w => /ab{1,4}c/.test(w))
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demo.filter(w => /ab{0,2}c/.test(w))
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demo.filter(w => /ab{3,}c/.test(w))
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demo.filter(w => /ab{3}c/.test(w))
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/Error.*valid/.test('Error: not a valid input')
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/Error.*valid/.test('Error: key not found')
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/cat.*dog|dog.*cat/.test('cat and dog')
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/cat.*dog|dog.*cat/.test('dog and cat')
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let patterns = [/cat/, /dog/]
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patterns.every(p => p.test('cat and dog'))
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patterns.every(p => p.test('dog and cat'))
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'foot'.replace(/f.?o/, 'X')
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console.log('blah < foo \\< bar < baz'.replace(/\\?</g, '\\<'))
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'hand handy handful'.replace(/hand(y|ful)?/g, 'X')
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let sentence = 'that is quite a fabricated tale'
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sentence.replace(/t.*a/, 'X')
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'star'.replace(/t.*a/, 'X')
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sentence.replace(/t.*a.*q.*f/, 'X')
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sentence.replace(/t.*a.*u/, 'X')
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'foot'.replace(/f.??o/, 'X')
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'frost'.replace(/f.??o/, 'X')
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'123456789'.replace(/.{2,5}?/, 'X')
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sentence.replace(/t.*?a/, 'X')
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'star'.replace(/t.*?a/, 'X')
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sentence.replace(/t.*?a.*?f/, 'X')
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'Hi there\nHave a Nice Day'.replace(/the.*ice/, 'X')
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'Hi there\nHave a Nice Day'.replace(/the.*ice/s, 'X')
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/b^2/.test('a^2 + b^2 - C*3')
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/b\^2/.test('a^2 + b^2 - C*3')
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'(a*b) + c'.replace(/\(|\)/g, '')
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'\\learn\\by\\example'.replace(/\\/g, '/')
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function escapeRegExp(string) {
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return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
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}
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let eqn = 'f*(a^b) - 3*(a^b)'
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const usr_str = '(a^b)'
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const pat = new RegExp(escapeRegExp(usr_str), 'g')
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pat
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eqn.replace(pat, 'c')
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eqn.replace(new RegExp(escapeRegExp(usr_str) + '$'), 'c')
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function unionRegExp(arr) {
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return arr.map(w => escapeRegExp(w)).join('|')
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}
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let w1 = ['c^t', 'dog$', 'f|x']
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const p1 = new RegExp(unionRegExp(w1), 'g')
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p1
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'c^t dog$ bee parrot f|x'.replace(p1, 'mammal')
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let w2 = ['hand', 'handy', 'handful']
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w2.sort((a, b) => b.length - a.length)
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const p2 = new RegExp(`\\b(${unionRegExp(w2)})\\b`, 'g')
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p2
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'handful handed handy hands hand'.replace(p2, 'X')
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const p3 = /\bpar\b/
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const p4 = new RegExp(p3.source + '|cat', 'g')
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p4
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console.log(p4.source)
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p4.flags
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'cater cat concatenate par spare'.replace(p4, 'X')
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let path = '/foo/123/foo/baz/ip.txt'
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path.replace(/^\/foo\/123\//, '~/')
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path.replace(new RegExp(`^/foo/123/`), '~/')
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