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What do pty and tty mean?
...s like a terminal to the process reading and writing there, but is managed by something else. They first appeared (as I recall) for X Window and screen and the like, where you needed something that acted like a terminal but could be used from another program.
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Prevent redirection of Xmlhttprequest
... response is an HTTP redirect:
If the origin of the URL conveyed by the Location header is same origin
with the XMLHttpRequest origin and the
redirect does not violate infinite
loop precautions, transparently
follow the redirect while observing
the same-origin request e...
Scrolling down both parts of a split-window at the same time in Vim
...he two files?
vimdiff file1 file2
This will give you the scroll binding by default.
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Adding Core Data to existing iPhone project
...u need them.
So open up Xcode and look for some file like App_Prefix.pch, by default it's in the Other Sources group. After the UIKit import statement, add the following line:
#import <CoreData/CoreData.h>
And you should be ready to go.
Xcode 4
For projects created in Xcode 4, the prefix...
Ruby on Rails: How do I add placeholder text to a f.text_field?
...older text to my f.text_field fields so that the text comes pre-written by default, and when a user click inside the fields, the text goes away - allowing the user to type in the new text?
...
Change R default library path using .libPaths in Rprofile.site fails to work
...is not respecting the Rprofile.site settings or perhaps is overriding them by reading an .Rprofile setting from one of the RStudio defaults. It should also be mentioned that the result from this operation also appends the contents of calls to .Library and .Library.site, which is further reason why a...
How do I declare an array of weak references in Swift?
...The provided code works as it is, but fails if you replace the class Stuff by a protocol; see this related question
– Theo
Apr 28 '16 at 12:03
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How to make good reproducible pandas examples
...for the rows where A is 1.
do show the code you've tried:
In [4]: df.groupby('A').sum()
Out[4]:
B
A
1 5
4 6
But say what's incorrect: the A column is in the index rather than a column.
do show you've done some research (search the docs, search StackOverflow), give a summary:
The docs...
Convert .pem to .crt and .key
...kcs12 -in certificate.pfx -out certificate.cer -nodes
Generate rsa keys by OpenSSL
Using OpenSSL on the command line you’d first need to generate a public and private key, you should password protect this file using the -passout argument, there are many different forms that this argument can ...
Given an emacs command name, how would you find key-bindings ? (and vice versa)
...ed information about a command, also any non-interactive function defined, by typing
C-h f function-name
Which will give you detailed information about a function, including any key bindings for it, and
C-h v variable-name
will give you information about any (bound) variable. Key-maps are kept...