Regular Expressions 101

Pro

Non-Capturing Group(?:\d+)

\d+a digit, repeated at least once

\s?optionally matches any whitespace character

Non-Capturing Group(?:gb|tb)

1st Alternativegb

gbthe literal text gb (case insensitive)

2nd Alternativetb

tbthe literal text tb (case insensitive)

\s?optionally matches any whitespace character

Non-Capturing Group(?:ddrl|ddr2)

1st Alternativeddrl

ddrlthe literal text ddrl (case insensitive)

2nd Alternativeddr2

ddr2the literal text ddr2 (case insensitive)

\s?optionally matches any whitespace character

Negative Lookahead(?!\d+\s?(gb|tb))

\d+a digit, repeated at least once

\s?optionally matches any whitespace character

Group 1(gb|tb)

1st Alternativegb

gbthe literal text gb (case insensitive)

2nd Alternativetb

tbthe literal text tb (case insensitive)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

(?:\d+)\s?(?:gb|tb)\s?(?:ddrl|ddr2)\s?(?!\d+\s?(gb|tb))

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Laptop HP Chromebook 14 G3 NVIDIA Tegra SOC 4GB DDRL 32GB FLASH 14inch 1366X768 Webcam Chrome OS

Laptop HP Chromebook 14 G3 NVIDIA Tegra SOC 4GB DDRL 32GB FLASH 14inch 1366X768 Webcam Chrome OS