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Grouping functions (tapply, by, aggregate) and the *apply family
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R has many *apply functions which are ably described in the help files (e.g. ?apply). There are enough of them, though, that beginning useRs may have difficulty deciding which one is appropriate for their situation or even remembering them all. They may have a general sense that "I should ...
how to delete all commit history in github? [duplicate]
...he following:
Checkout
git checkout --orphan latest_branch
Add all the files
git add -A
Commit the changes
git commit -am "commit message"
Delete the branch
git branch -D master
Rename the current branch to master
git branch -m master
Finally, force update your repository
git push -f origin...
How can I get Express to output nicely formatted HTML?
...n my case I didn't have the 'env' var set. You can add it to the main .js file with this one line : process.env.NODE_ENV = 'development';
– Gene Bo
Jun 1 '15 at 17:21
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How to execute shell command in Javascript
...r exec = require('child_process').exec, child;
child = exec('cat *.js bad_file | wc -l',
function (error, stdout, stderr) {
console.log('stdout: ' + stdout);
console.log('stderr: ' + stderr);
if (error !== null) {
console.log('exec error: ' + error);
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Why is x86 ugly? Why is it considered inferior when compared to others? [closed]
...dern implementations with register renaming onto a large physical register file can keep many instructions in flight, but lack of architectural registers was still a significant weakness for 32-bit x86. x86-64's increase from 8 to 16 integer and vector registers is one of the biggest factors in 64b...
Why is it said that “HTTP is a stateless protocol”?
...k. You could serve HTTP over named pipes if you wanted, or even by sending files around, if you got enough masochists to agree to do it, and it would work precisely because HTTP is transport-protocol-agnostic. At that level, it's all just requests and responses. That makes HTTP itself stateless, reg...
How can I put the current running linux process in background? [closed]
I have a command that uploads files using git to a remote server from the Linux shell and it will take many hours to finish.
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SmtpException: Unable to read data from the transport connection: net_io_connectionclosed
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Add the username from SendGrid into your SMTP settings in the web.config file.
Hope this helps!
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How to go to each directory and execute a command?
...be better in that it transfers to situations where the wildcard does match files whose names contain whitespace and/or shell metacharacters.
– tripleee
Apr 17 '15 at 9:53
1
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C Macro definition to determine big endian or little endian machine?
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Code supporting arbitrary byte orders, ready to be put into a file called order32.h:
#ifndef ORDER32_H
#define ORDER32_H
#include <limits.h>
#include <stdint.h>
#if CHAR_BIT != 8
#error "unsupported char size"
#endif
enum
{
O32_LITTLE_ENDIAN = 0x03020100ul,
O32_B...