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Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...his can be done with Paul Murrell's package compare:
library(compare)
a1 <- data.frame(a = 1:5, b = letters[1:5])
a2 <- data.frame(a = 1:3, b = letters[1:3])
comparison <- compare(a1,a2,allowAll=TRUE)
comparison$tM
# a b
#1 1 a
#2 2 b
#3 3 c
The function compare gives you a lot of flexi...
Upload files with HTTPWebrequest (multipart/form-data)
...ith memory stream, writing directly to the request stream. Here is the result:
public static void HttpUploadFile(string url, string file, string paramName, string contentType, NameValueCollection nvc) {
log.Debug(string.Format("Uploading {0} to {1}", file, url));
string boundary...
The type or namespace name 'Objects' does not exist in the namespace 'System.Data'
...e existing code-generation templates. These files will typically be named <edmx_file_name>.tt and <edmx_file_name>.Context.tt and be nested under your edmx file in Solution Explorer. You can select the templates in Solution Explorer and press the Del key to delete them.
Note: In Web Si...
How to remove focus around buttons on click
...ough a page with the keyboard. Removing the outline makes that very difficult. It's probably better to prevent the button from receiving focus on click.
– Murphy Randle
Jan 27 '16 at 21:30
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How do I ZIP a file in C#, using no 3rd-party APIs?
...tor fails. You may run into this issue if you simply use the filenames resulting from Directory.GetFiles(). Best to extract the file name using Path.GetFileName() for the file entry argument.
– Manish
Aug 11 '14 at 21:48
...
How can I create an object based on an interface file definition in TypeScript?
...plementation of the IModal interface you may want to delete the interface altogether and use...
const modal: Modal = new Modal();
Rather than
const modal: IModal = new Modal();
share
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improve ...
Programmatically retrieve memory usage on iPhone
...re designed to give you a much better picture of usage over-all.
#import <mach/mach.h>
// ...
void report_memory(void) {
struct task_basic_info info;
mach_msg_type_number_t size = TASK_BASIC_INFO_COUNT;
kern_return_t kerr = task_info(mach_task_self(),
...
diff current working copy of a file with another branch's committed copy
...this form of git-diff (see the git-diff manpage)
git diff [--options] <commit> [--] [<path>...]
This form is to view the changes you have in your working tree
relative to the named <commit>. You can use HEAD to compare it with
the latest commit, or a branch...
What happens when a duplicate key is put into a HashMap?
If I pass the same key multiple times to HashMap ’s put method, what happens to the original value? And what if even the value repeats? I didn’t find any documentation on this.
...
Convert.ChangeType() fails on Nullable Types
...self. Thanks for Nullable.GetUnderlyingType! Helped me out a lot when I built a poor man's ModelBinder for a project that needed it. I owe you a beer!
– Maxime Rouiller
Feb 22 '12 at 19:43
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