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iRules Style Guide

This article (formatted here in collaboration with and from the notes of F5er Jim_Deucker) features an opinionated way to write iRules, which is an extension to the Tcl language. Tcl has its own st...
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Updated May 20, 2024
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iRules
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JRahm's avatar
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Christ Follower, Husband, Father, Technologist. I love community and I especially love THIS community. My background is networking, but I've dabbled in all the F5 iStuff, I'm a recovering Perl guy, and am very much a python enthusiast. Learning alongside all of you in this accelerating industry toward modern apps and architectures.
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Jim_Deucker's avatar
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Author of vscode extensions for iRules, iApps and Tcl, https://github.com/bitwisecook
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JRahm's avatar
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Christ Follower, Husband, Father, Technologist. I love community and I especially love THIS community. My background is networking, but I've dabbled in all the F5 iStuff, I'm a recovering Perl guy, and am very much a python enthusiast. Learning alongside all of you in this accelerating industry toward modern apps and architectures.
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Kai_Wilke
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Jan 10, 2023

Hi Jason, 

you may review your topic 10.), since it provides slightest false information. I assume you accidentially just mixed up || vs. && with eq vs == in on scentence?  

"eq" or "ne" is different from "==" or "!=". 

"==" or "!=" should only be used for numeric comparsions only

"eq" or "ne" should be used for string comparions.

Examples of the math behind == comparsions:

1 == 1.0 is true
1 == 0001 is true
1 == "0x0000001" is true
1 == "\n\n\n\t\t\t1.e0\n\n\n" is also true
1 == 1.000000000000000031337 is also true
10 == 012 is also true

Beside of this using "eq" to compare "strings" is faster than comparing them with "==" (since no shimmering is involved).

The difference of || / && vs. "or" / "and" are not that huge. I consider the differences as personal preferecens... 😉

Cheers, Kai