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How to get CRON to call in the correct PATHs
...ystemwide cron file looks like this:
This has the username field, as used by /etc/crontab.
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file.
# This file also has a username field, that non...
Beginners Guide to Haskell? [closed]
... The "Study plan for Haskell" link has apparently been fixed by moving it to the Wayback Machine.
– simon
Oct 15 '11 at 8:48
...
What are the performance characteristics of sqlite with very large database files? [closed]
...the indices take longer.
Multiple Tables
I then tried splitting the data by time over several tables, one table per day. The data for the original 1 table was split to ~700 tables.
This setup had no problems with the insertion, it did not take longer as time progressed, since a new table was cre...
What to use as an initial version? [closed]
...
My versioning is driven by the setup. I want it to replace older versions, so I keep increasing it in jumps that make sense to me.
Sometimes, however, versioning is driven by the customer, especially if you're releasing code to the public.
If it'...
Difference between Hashing a Password and Encrypting it
...gned to prevent the occurrence of collisions. You can attack a secure hash by the use of a rainbow table, which you can counteract by applying a salt to the hash before storing it.
Encrypting is a proper (two way) function. It's reversible, you can decrypt the mangled string to get original string ...
Is the pImpl idiom really used in practice?
I am reading the book "Exceptional C++" by Herb Sutter, and in that book I have learned about the pImpl idiom. Basically, the idea is to create a structure for the private objects of a class and dynamically allocate them to decrease the compilation time (and also hide the private implementatio...
Code-first vs Model/Database-first [closed]
...ines the database.
Database first
Very popular if you have DB designed by DBAs, developed separately or if you have existing DB.
You will let EF create entities for you and after modification of mapping you will generate POCO entities.
If you want additional features in POCO entities you must e...
Comparing two java.util.Dates to see if they are in the same day
...e above will for both dates compute the day relative to the time zone used by the computer it is running on. If this is not what you need, you have to pass the relevant time zone(s) to the Calendar.getInstance() calls, after you have decided what exactly you mean with "the same day".
And yes, Joda ...
“using namespace” in c++ headers
...include s in their .h files. This seems to me to be dangerous since then by including that header in another program I will get the namespace imported into my program, maybe without realizing, intending or wanting it (header inclusion can be very deeply nested).
...
Twitter Bootstrap - add top space between rows
...ere size is one of:
0 - for classes that eliminate the margin or padding by setting it to 0
1 - (by default) for classes that set the margin or padding to $spacer * .25
2 - (by default) for classes that set the margin or padding to $spacer * .5
3 - (by default) for classes that set the margin or p...