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How to get next/previous record in MySQL?
...ded the results ordered by date since I can't rely on the ID field as a sortable column. Here's the solution I came up with.
First we find out the index of the desired record in the table, when it's sorted as we want:
SELECT row
FROM
(SELECT @rownum:=@rownum+1 row, a.*
FROM articles a, (SELECT @...
Can I use GDB to debug a running process?
...so use the "file" command
to specify the program, and to load its symbol table.
NOTE: You may have difficulty attaching to a process due to improved security in the Linux kernel - for example attaching to the child of one shell from another.
You'll likely need to set /proc/sys/kernel/yama/ptr...
Convert a matrix to a 1 dimensional array
...dimensions of the matrix/array.
Elts_int <- as.matrix(tmp_int) # read.table returns a data.frame as Brandon noted
dim(Elts_int) <- (maxrow_int*maxcol_int,1)
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What is the maximum length of latitude and longitude? [closed]
...nd a 0.1 decimal degree difference represents a ~11 km distance.
Here is a table of # decimal places difference in latitude with the delta degrees and the estimated distance in meters using 0,0 as the starting point.
decimal decimal distance
places degrees (in meters)
------- --------- -...
Converting HTML files to PDF [closed]
...exisiting (X)HTML-document. The input files (reports) use a rather simple, table-based layout, so support for really fancy JavaScript/CSS stuff is probably not needed.
...
.NET HashTable Vs Dictionary - Can the Dictionary be as fast?
I am trying to figure out when and why to use a Dictionary or a HashTable. I have done a bit of a search on here and have found people talking about the generic advantages of the Dictionary which I totally agree with, which leads the boxing and unboxing advantage for a slight performance gain.
...
Convert data.frame column to a vector?
... of using the '[[' operator is that it works both with data.frame and data.table. So if the function has to be made running for both data.frame and data.table, and you want to extract a column from it as a vector then
data[["column_name"]]
is best.
...
What is the best Distributed Brute Force countermeasure?
...nd since it still beats being locked out of your account, it would be acceptable.
(Also, note that none of this happens if the attack is any less sophisticated than the nasty distributed version I've described here. If the attack is coming from just a few IPs or only hitting a few usernames, it wi...
Disable migrations when running unit tests in Django 1.7
...been run, the "migrate" command treats
an app as unmigrated, and creates tables directly from the models just
like syncdb did in 1.6. I defined a new settings module just for unit
tests called "settings_test.py", which imports * from the main
settings module and adds this line:
MIGRATIO...
Change SQLite default settings
we know when type .mode column let me see tables like column
And .headers on , we can see the header of tables.
But I want to know if there is any way make the two default settings?
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