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Check if a program exists from a Makefile
...q directive, rather than to define a new variable, and to use the GNU Make error function to stop the build if a required executable is not in ${PATH}. For example, to test for the lzop executable:
ifeq (, $(shell which lzop))
$(error "No lzop in $(PATH), consider doing apt-get install lzop")
en...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock'
...ebrew install mysql , but when I tried mysql -u root I got the following error:
27 Answers
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Rails: FATAL - Peer authentication failed for user (PG::Error)
... host: localhost and pool: 5 was missing in my config. After adding them, error disappeared.
– Amit Patel
Aug 30 '12 at 6:49
21
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How to directly initialize a HashMap (in a literal way)?
...u want to?
– yankee
Aug 16 '15 at 8:05
6
and for the cases when you need a Map with a single entr...
How to round up to the nearest 10 (or 100 or X)?
...nding value y:
# Round(1.3,1) = 1 while Round(1.6,1) = 2
# Round(1.024,0.05) = 1 while Round(1.03,0.05) = 1.05
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EXC_BAD_ACCESS signal received
...to the device, the program will quit after a few cycles with the following error:
32 Answers
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IIS7: HTTP->HTTPS Cleanly
...on't have to remember all the steps you went through with the 403.4 custom error page or other special permissions, it just works.
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="HTTP to HTTPS redirect" stopProcessing="true">
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Logging levels - Logback - rule-of-thumb to assign log levels
... production support standpoint; that said, we assign roughly as follows:
error: the system is in distress, customers are probably being affected (or will soon be) and the fix probably requires human intervention. The "2AM rule" applies here- if you're on call, do you want to be woken up at 2AM if...
ExpressJS - throw er Unhandled error event
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Such a common error really deserves a better error message.
– Tamlyn
Jul 10 '14 at 21:15
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What is the purpose of Rank2Types?
... typecheck (although some functions that go into infinite loops or produce errors and therefore never return will do so).
The above is contrived, of course, but a variation on this technique is key to making the ST monad safe.
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