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What's the difference between lapply and do.call?
...So for a n element list, lapply has n function calls, and do.call has just one function call. So do.call is quite different from lapply. Hope this clarifies your issue.
A code example:
do.call(sum, list(c(1, 2, 4, 1, 2), na.rm = TRUE))
and:
lapply(c(1, 2, 4, 1, 2), function(x) x + 1)
...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...ared statements will still escape query parameter values, it will just be done in the PDO library with strings instead of on the MySQL server using the binary protocol. In other words, the same PDO code will be equally vulnerable (or not-vulnerable) to injection attacks regardless of your EMULATE_PR...
Drop all tables whose names begin with a certain string
...You may need to modify the query to include the owner if there's more than one in the database.
DECLARE @cmd varchar(4000)
DECLARE cmds CURSOR FOR
SELECT 'drop table [' + Table_Name + ']'
FROM INFORMATION_SCHEMA.TABLES
WHERE Table_Name LIKE 'prefix%'
OPEN cmds
WHILE 1 = 1
BEGIN
FETCH cmds INTO...
How to know when UITableView did scroll to bottom in iPhone
... answered Apr 11 '11 at 21:34
neoneyeneoneye
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How do I format a string using a dictionary in python-3.x?
...placeholder makes the code more explicit, and easier to use. Especially if one has something like this: '{0[latitude]} {1[latitude]} {0[longitude]} {1[longitude]}'.format(geopoint0, geopoint1)
– Løiten
Sep 6 '16 at 13:01
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Find and replace strings in vim on multiple lines
...ines (vertically, so to speak), while the 'g' flag determines whether only one or all matches within the line (so horizontally) are replaced.
– Ingo Karkat
Feb 15 at 20:58
add...
How to run Rake tasks from within Rake tasks?
...ut it doesn't execute its dependencies:
Rake::Task["build"].execute
This one executes the dependencies, but it only executes the task if
it has not already been invoked:
Rake::Task["build"].invoke
This first resets the task's already_invoked state, allowing the task to
then be executed again, d...
Safely casting long to int in Java
...
I like this one, anyone has something against this solution?
– Rui Marques
Apr 22 '13 at 12:05
12
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How to do scanf for single char in C [duplicate]
... previous entry, for example) the scanf call will consume it immediately.
One way around the problem is to put a blank space before the conversion specifier in the format string:
scanf(" %c", &c);
The blank in the format string tells scanf to skip leading whitespace, and the first non-whites...
How to send data to local clipboard from a remote SSH session
...ad because I've been looking for the same kind of solution, and I've found one that works for me. It's a minor modification to a suggestion from OSX Daily.
In my case, I use Terminal on my local OSX machine to connect to a linux server via SSH. Like the OP, I wanted to be able to transfer small bit...