| --- Log opened Mon Feb 13 00:00:01 2012 |
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| 11:27 | < Rhamphoryncus> | I just can't seem to do anything simply |
| 11:28 | < Rhamphoryncus> | alias make='make -j "$(grep -c '^processor\s*:' /proc/cpuinfo)"' |
| 11:28 | < Rhamphoryncus> | Anybody know how to make that work? I'm using '' twice, which is probably the failure point, but adding escapes just gives different errors |
| 11:32 | < Rhamphoryncus> | adding single escapes at the inner ' causes it to complain the ) being unexpected (why? It's in single quotes, it shouldn't be touching any of this until I call it.) |
| 11:32 | < Rhamphoryncus> | Double-escaping the inner ' causes it to pass the alias command, but then it hangs when I run it |
| 11:33 | < Rhamphoryncus> | Oh, and I'm testing by replacing make with echo |
| 11:41 | <@jerith> | You can't escape in single quotes. |
| 11:42 | <@jerith> | So replace the inner ' with \" or something? |
| 11:44 | < Rhamphoryncus> | result is make -j 0 |
| 11:46 | <@jerith> | Replace the outer ' with " and the inner " with \"? |
| 11:47 | < Rhamphoryncus> | ahhhh that one got it |
| 11:47 | < Rhamphoryncus> | I feel like I should have tried it before |
| 11:48 | <@jerith> | Or maybe just: alias make="make -j $(grep -c '^processor\s*:' /proc/cpuinfo)" |
| 11:48 | < Rhamphoryncus> | Of course plain `` would have worked too, but I avoid them on principle |
| 11:49 | < Rhamphoryncus> | I always want my shell commands to avoid the potential for inappropriate evaluation |
| 11:49 | <@jerith> | You probably want to evaluate the number of processors at alias-definition time. |
| 11:50 | < Rhamphoryncus> | hrm.. when'd be when I log in. That's true. |
| 11:50 | < Rhamphoryncus> | grammar fail |
| 12:00 | < Rhamphoryncus> | err.. it's doing that anyway |
| 12:00 | < Rhamphoryncus> | rhamph@Tetronimo:~$ alias make |
| 12:00 | < Rhamphoryncus> | alias make='make -j "4"' |
| 12:01 | < Rhamphoryncus> | So what would that be? Doing the wrong thing right? |
| 12:03 | <@jerith> | Right thing. |
| 12:03 | < Rhamphoryncus> | It wasn't my intent so it's wrong, but the result is right. |
| 12:03 | <@jerith> | Unless you expect your shell to migrate to a different machine? |
| 12:03 | <@jerith> | I think you's need to escape the $ to delay it. |
| 12:04 | <@jerith> | But even then, you don't need the inner quotes. |
| 12:04 | <@jerith> | (Since there's no whitespace in the subshell output.) |
| 12:05 | < Rhamphoryncus> | As I said it's the principle of it |
| 12:05 | < Rhamphoryncus> | Do it securely unless I need to do it otherwise. Don't do it insecurely by default |
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| 13:00 | | * TheWatcher eyes this code he has just written |
| 13:00 | <@TheWatcher> | my %userdata; @userdata{@{$fields}} = @{$userfields}; |
| 13:01 | <@Tamber> | Makes perfect sense. |
| 13:03 | <@TheWatcher> | Just a bit of a shame it whines if the userfields array is shorter than the fields array when use strict is on. |
| 13:04 | <@TheWatcher> | (not that it should happen in this situation, but meh) |
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| 15:58 | | * TheWatcher vaguely snerks at the perlobj |
| 15:59 | <@TheWatcher> | "Summary: That's about all there is to it. Now you just need to go off and buy a book about object-oriented design methodology, and bang your forehead with it for the next six months or so." |
| 16:00 | <@Tamber> | Hehehe |
| 16:26 | <@gnolam> | Ooh, work |
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| --- Log closed Tue Feb 14 00:00:18 2012 |