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What is the difference between LL and LR parsing?
...
Predict: Based on the leftmost nonterminal and some number of lookahead tokens, choose which production ought to be applied to get closer to the input string.
Match: Match the leftmost guessed terminal symbol with the leftmost unconsumed symbol of input.
As an example, given this grammar:
S ...
grep exclude multiple strings
...e.txt:
abc
def
ghi
jkl
grep command using -E option with a pipe between tokens in a string:
grep -Ev 'def|jkl' filename.txt
prints:
abc
ghi
Command using -v option with pipe between tokens surrounded by parens:
egrep -v '(def|jkl)' filename.txt
prints:
abc
ghi
...
What is the claims in ASP .NET Identity
...The user requests an action. The relying party (RP) application asks
for a token.
The user presents the credentials to the issuing authority that the RP application trusts.
The issuing authority issues a signed token with claims, after authenticating the user’s
credentials.
The user presents the t...
How do I remove the Devise route to sign up?
...giving you this problem:
Started GET "/users/invitation/accept?invitation_token=xxxxxxx" for 127.0.0.1
Processing by Devise::InvitationsController#edit as HTML
Parameters: {"invitation_token"=>"6Fy5CgFHtjWfjsCyr3hG"}
[Devise] Could not find devise mapping for path "/users/invitation/accept? ...
Purpose of Django setting ‘SECRET_KEY’
...KEY = ''
conf/project_template/settings.py:61:SECRET_KEY = ''
contrib/auth/tokens.py:54: hash = sha_constructor(settings.SECRET_KEY + unicode(user.id) +
contrib/comments/forms.py:86: info = (content_type, object_pk, timestamp, settings.SECRET_KEY)
contrib/formtools/utils.py:15: orde...
REST APIs: custom HTTP headers vs URL parameters
... part of a REST API?
Authentication: GUIDs, basic authentication, custom tokens, etc. e.g.,
Basic Authentication with a Guid token for REST api instead of username/password
If you get involved in passing tokens or other authentication-like information between domains covered by PCI-DSS or othe...
Getting “Skipping JaCoCo execution due to missing execution data file” upon executing JaCoCo
...ing. 2. In Travis environment variables for my project, had typo in SONART_TOKEN=*****, should have been named SONAR_TOKEN=*****. See Travis docs here, search for or define SONAR_TOKEN in your Repository Settings. After I fixed that, build ran successfully. You may view my gitbhub project in questio...
Can an array be top-level JSON-text?
...ed value."
ECMA-404: Any JSON value. "A JSON text is a sequence of tokens formed from Unicode code points that conforms to the JSON value
grammar."
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...
Asynchronously wait for Task to complete with timeout
...at runtime.
int timeout = 1000;
var task = SomeOperationAsync(cancellationToken);
if (await Task.WhenAny(task, Task.Delay(timeout, cancellationToken)) == task)
{
// Task completed within timeout.
// Consider that the task may have faulted or been canceled.
// We re-await the task so tha...
Good or bad practice for Dialogs in wpf with MVVM?
...ed notification from others in the handler. Two solutions:
send a unique token on opening a dialogue window and check that token in the subscription
use generic notification classes <T> where T is enumeration of entities (or for simplicity it can be type of ViewModel).
For a project should ...