abc | A B Compiler for x86 | Compiler library
kandi X-RAY | abc Summary
kandi X-RAY | abc Summary
abc is a compiler for the [B Programming Language] that targets x86\_32 processors. It is currently tested under Linux but should work (or at least be easily ported) to other UNIX-like systems. The code is based on [an early C compiler (last1120c)] by Dennis Ritchie.
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QUESTION
In Python, is there a way to distinguish between strings and other iterables of strings?
A str
is valid as an Iterable[str]
type, but that may not be the correct input for a function. For example, in this trivial example that is intended to operate on sequences of filenames:
ANSWER
Answered 2022-Mar-29 at 06:36This issue has been discussed since at least July 2016. On a proposal to distinguish between str
and Iterable[str]
, Guido van Rossum writes:
Since
str
is a valid iterable ofstr
this is tricky. Various proposals have been made but they don't fit easily in the type system.
You'll need to list out all of the types that you want your functions to accept explicitly, using Union
(pre-3.10) or |
(3.10 and higher).
e.g. For pre-3.10, use:
QUESTION
I have added android:exported="true"
to my only activity in manifest but still getting below error after updating compile sdk and target sdk version to 31.I also tried rebuilding the project , invalidating cache and restart but that didn't helped
Error- Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details.
ANSWER
Answered 2021-Oct-05 at 10:38After the build has failed go to AndroidManifest.xml
and in the bottom click merged manifest see which activities which have intent-filter but don't have exported=true
attribute. Or you can just get the activities which are giving error.
Add these activities to your App manifest with android:exported="true"
and app tools:node="merge"
this will add exported attribute to the activities giving error.
Example:
QUESTION
Given a list of Strings:
...ANSWER
Answered 2022-Mar-22 at 07:13This problem should be solved easily using a trie.
The trie node should basically keep a track of 2 things:
- Child nodes
- Count of prefixes ending at current node
Insert all strings in the trie, which will be done in O(string length * number of strings)
. After that, simply traversing the trie, you can hash the prefixes based on the count as per your use case. For suffixes, you can use the same approach, just start traversing the strings in reverse order.
Edit:
On second thought, trie might be the most efficient way, but a simple hashmap implementation should also work here. Here's an example to generate all prefixes with count > 1.
QUESTION
How can I split the following vector to list with every new element whereever an empty ''
value is encountered?
For e.g. Given the following input-
...ANSWER
Answered 2022-Feb-15 at 16:46Create a logical vector based on the blank elements (i1
), get the cumulative sum on the logical vector to create group for split
ting the subset of vector (i.e. without the blanks)
QUESTION
I'm getting the following two errors on all TypeScript files using ESLint in VS Code:
...ANSWER
Answered 2021-Dec-14 at 12:09You missed adding this in your eslint.json
file.
QUESTION
I want to use private route with react-router-dom v6, while i am trying to apply a condition for auth.
In App.js
...ANSWER
Answered 2021-Nov-11 at 07:22In react-router-dom
version 6 there is no render
prop for the Route
component. You can also simplify your PrivateRoute
wrapper component a bit, it doesn't need to render more Routes
and Route
components.
Conditionally render the component's children or navigate to log in.
QUESTION
I have an ECS task running on Fargate on which I want to run a command in boto3 and get back the output. I can do so in the awscli just fine.
...ANSWER
Answered 2022-Jan-04 at 23:43Ok, basically by reading the ssm session manager plugin source code I came up with the following simplified reimplementation that is capable of just grabbing the command output:
(you need to pip install websocket-client construct
)
QUESTION
Given that the C++ standard library doesn't (currently) provide constexpr versions of the cmath functions, consider the program below.
...ANSWER
Answered 2021-Dec-29 at 18:23As noted, the C++ standard library doesn't currently support constexpr
evaluation of cmath functions. However, that doesn't prevent individual implementations from having non-standard code. GCC has a nonconforming extension that allows constexpr
evaluation.
QUESTION
Based on the documentation for Raku's lookaround assertions, I read the regex / /
as saying "starting from the left, match but do not not consume one character that is a
, b
, or c
and, once you have found a match, match and consume one alphabetic character."
Thus, this output makes sense:
...ANSWER
Answered 2021-Dec-20 at 12:26 and
does not seem to support some backslashed character classes.
\n
, \s
, \d
and \w
show similar results.
behaves the same as
<[abc\s]>
when \n
, \s
, \d
or \w
is added.
\t
, \h
, \v
, \c[NAME]
and \x61
seem to work as normal.
QUESTION
My problem is that I'm trying to handle the value of my inputs, which the user defines which input he wants, by an API call.
Here is where I get the values :
...ANSWER
Answered 2021-Dec-10 at 13:32It was a bit hacky so I simplified it, I think you should understand the logic behind it.
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