Re: maths
Re: maths
- Subject: Re: maths
- From: Christopher Stone <email@hidden>
- Date: Wed, 18 Apr 2012 18:01:27 -0500
On Apr 18, 2012, at 15:29, Javi Pérez wrote:
Well, it worked in this way:
______________________________________________________________________
Hey Javi,
You don't have control of what 'Words' means in Applescript, and sometimes it will give unexpected results. For instance - during several test runs of your first posted script "word 29" sometimes returned "SharedLibs" on my system (Lion).
Text Item Delimiters allow you a bit more precision:
set {oldTIDS, AppleScript's text item delimiters} to {AppleScript's text item delimiters, {": ", "% ", ", "}} tell paragraph 4 of (do shell script "top -n1 -l1") to set totalUsage to 100 - (its text items's item 6) set AppleScript's text item delimiters to oldTIDS totalUsage
You could also do most of the work in the shell, since you're going there anyway.
set totalUsage to 100 - (do shell script "top -n1 -l1 | sed -En '/^CPU.+/p' | sed -E 's/.+sys[^0-9]+([0-9.]+).+/\\1/'")
--> 31.58
My preferred tool for parsing in Applescript is the Satimage.osax. It makes regular _expression_ find, find/replace, and a slew of other useful functions directly available to Applescript.
set topReport to do shell script "top -n1 -l1" set totalUsage to 100 - (find text "^.+?([0-9.]+)%\\s+idle" in topReport using "\\1" with regexp and string result )
--> 26.32
Note that on Lion all the strings coerce to number without incident (and this should be true of most if not all of its antecedents).
On Apr 18, 2012, at 16:30, Javi Pérez wrote: Spanish uses "," as decimal. And yes probably I could need change my system language to english, it gives me headaches sometimes
Ah. Change the period decimal point to a comma as needed in the above. Note that '.' is a token for any single character in regex, so you need only change an escaped period '\.' or in Applescript the backslash must itself be escaped '\\.'.
Since Shane Stanley has released ASObjC Runner.app, I think it worth mentioning for people unwilling to install an OSAX. It has a nice Applescript Dictionary and is useful for those who want to start bridging Applescript and ObjC without requiring an applet.
RegEx find with capture:
set topReport to do shell script "top -n1 -l1" tell application "ASObjC Runner" set totalUsage to 100 - (look for "^.+?([0-9.]+)%\\s+(idle)" in topReport capture 1 options "im") end tell
--> 33.34
-- Best Regards, Chris
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| References: | |
| | >maths (From: Javi Pérez <email@hidden>) |
| | >Re: maths (From: Alex Zavatone <email@hidden>) |
| | >RE: maths (From: Javi Pérez <email@hidden>) |
| | >Re: maths (From: Alex Zavatone <email@hidden>) |
| | >RE: maths (From: Javi Pérez <email@hidden>) |