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What is DOCTYPE?
...s NOT defined by the DTD!
For example, a doctype could define how the <table>-tag can look like - which attributes it accepts, and which values/valuetypes are accepted for each attribute. Think of it as a lexicon for your current webpage.
Wikipedia has an informative page on the various Doct...
R - Concatenate two dataframes?
...rbind but in this case you need to have the same number of columns in both tables, so try the following:
b$b<-as.double(NA) #keeping numeric format is essential for further calculations
new<-rbind(a,b)
share
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Show or hide element in React
... whould be like in the tutorial here, where the search bar and the results table are siblings instead of putting Results inside Search: facebook.github.io/react/docs/thinking-in-react.html
– Douglas
Jul 2 '14 at 15:58
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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...lly, setdiff(bigFrame, smallFrame) gets you the extra records in the first table.
In the SQLverse this is called a
For good descriptions of all join options and set subjects, this is one of the best summaries I've seen put together to date: http://www.vertabelo.com/blog/technical-articles/sq...
How to set HTTP headers (for cache-control)?
...v attribute is an enumerated attribute" means it allows only values in the table in the spec. It even calls out caching in the later section ("other pragma directives"): > Pragma directives corresponding to headers that affect the HTTP processing model (e.g. caching) must not be registered, as th...
How to easily map c++ enums to strings
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@jf. Yes, the important point was to build static data tables at compile time automatically. I would probably prefer just generating a dumb static array.
– Martin Beckett
Mar 5 '09 at 16:46
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What is ModelState.IsValid valid for in ASP.NET MVC in NerdDinner?
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Sometimes its an error in the related table if property names have been changed, migrations have not been performed and as a result the SaveChanges(); fails and cannot occur due to the change.
– Oracular Man
Feb 25 '18 at 18...
Count with IF condition in MySQL query
I have two tables, one is for news and the other one is for comments and I want to get the count of the comments whose status has been set as approved.
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How to set breakpoints on future shared libraries with a command flag
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With no symbols.
objdump -t /lib/libacl.so
SYMBOL TABLE:
no symbols
objdump -T /lib/libacl.so
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00002bd0 g DF .text 000000d0 ACL_1.0 acl_delete_entry
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(gdb) break 0x0002bd0
(gdb) x/20i acl_delete_entry
0x2bd0 <acl_delete_entry>: stwu r1,-32(r1...
How to use Class in Java?
...ll know that Vector<int[]> is a vector of integer arrays, and HashTable<String, Person> is a table of whose keys are strings and values Person s.
However, what stumps me is the usage of Class<> .
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