Regular Expressions 101

Explanation

Pro

^start of line

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of line

Non-Capturing Group(?:.(?!^[0-9]+\.$))+

+repeats the group contents below at least once:

.any character

Negative Lookahead(?!^[0-9]+\.$)

^start of line

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of line

Positive Lookbehind(?<=^|[^\p{L}\p{N}\p{M}\p{Pc}])

1st Alternative^

^start of line

2nd Alternative[^\p{L}\p{N}\p{M}\p{Pc}]

Negated Character Class[^\p{L}\p{N}\p{M}\p{Pc}]

\p{L}any Unicode letter

\p{N}a decimal digit, letterlike number, or other numeric character

\p{M}a combining mark

\p{Pc}a connecting punctuation mark, such as an underscore

dziedāsthe literal text dziedās (case sensitive)

Positive Lookahead(?=$|[^\p{L}\p{N}\p{M}\p{Pc}])

1st Alternative$

$end of line

2nd Alternative[^\p{L}\p{N}\p{M}\p{Pc}]

Negated Character Class[^\p{L}\p{N}\p{M}\p{Pc}]

\p{L}any Unicode letter

\p{N}a decimal digit, letterlike number, or other numeric character

\p{M}a combining mark

\p{Pc}a connecting punctuation mark, such as an underscore

.*?any character, repeated any number of times

Positive Lookahead(?=^[0-9]+\.$)

^start of line

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

s modifier: single line. Allows a dot to match line terminators

u modifier: unicode. Enables Unicode-aware matching and escape syntax

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

26 tokens

Regular Expression

^[0-9]+\.$(?:.(?!^[0-9]+\.$))+(?<=^|[^\p{L}\p{N}\p{M}\p{Pc}])dziedās(?=$|[^\p{L}\p{N}\p{M}\p{Pc}]).*?(?=^[0-9]+\.$)

New

/* 1970  #1.#  PAR DZIESMĀM UN DZIEDAŠANU
#1. Dziesmas un dziedašana vispāriga tautas manta un cilvēka mūža pavadoņi.
1.Dziesmas visai Latvijai kopeja manta. */

15.
Dziesmiņ' mana, kā dziedama,
Ne ta mana pamanita;
Vecā māte pamācija,
Aizkrāsnē tupedama.
#279a.

16.
Māci, māte, man' dziedāt,
Māc' ar vienu Dieva dziesmu,
Ko dziedās dvēselite,
Pie Dieviņa aizgājuse.
#15b,27b.
16-1.
Māci mani, māmuliņa,
Jele vienu Dieva dziesmu,
Ko dziedās dvēselite,
Dieva duru dagājuse.
#33d.
4:[Dieva durvim pieiedama].
#137e.
4:[Debes durvim piegājusi].
#111d.
4:[Pie Dieviņa debesīs].
#137c.
16-2.
Māci mani, māmulite,
Māci kādu Dieva dziesmu,
Ko dziedašu, nogājuse
Pie Dieviņa nama durvu.
Ne Dieviņis iekšā laida,
Ne eņģeļi vārtus vēra.
#218.
16-3.
Tēvis, tēvis, māte, māte,
Mācat mani pātaros;
Es āziešu pie Dieviņa
Bez neviena pātariņa.
#172i.

17.
Dzied', māsiņ, dzied', māsiņ,
Vedīs tautas šoruden;
Atstāj savas skaistas dziesmas
Jaunajām māsiņām.
#324a.

18.
Es dziedāt nedziedaju (nevareju),
Sacīt vien