z | z - jump around - Z User Commands Z | Regex library
kandi X-RAY | z Summary
kandi X-RAY | z Summary
Z(1) User Commands Z(1). NAME z - jump around. SYNOPSIS z [-chlrtx] [regex1 regex2 ... regexn]. DESCRIPTION Tracks your most used directories, based on 'frecency'. OPTIONS -c restrict matches to subdirectories of the current directory. EXAMPLES z foo cd to most frecent dir matching foo.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of z
z Key Features
z Examples and Code Snippets
def z_function(input_str: str) -> list[int]:
"""
For the given string this function computes value for each index,
which represents the maximal length substring starting from the index
and is the same as the prefix of the same size
def angle(z, deg=False): # pylint: disable=missing-function-docstring
def f(x):
if x.dtype in _tf_float_types:
# Workaround for b/147515503
return array_ops.where_v2(x < 0, np.pi, 0)
else:
return math_ops.angle(x)
public static double zScore(double num, double mean, double stdDev)
{
double z = (num - mean)/stdDev;
return z;
}
Community Discussions
Trending Discussions on z
QUESTION
I'm having an issue when i'm uploading app bundle to the play console that You uploaded an APK or Android App Bundle which has an activity, activity alias, service or broadcast receiver with intent filter, but without 'android:exported' property set. This file can't be installed on Android 12 or higher. but my manifest file includes the property.
Manifest file
...ANSWER
Answered 2022-Jan-12 at 23:56I face the same Issue but i solved by writing android:exported="true" in activity bellow the android:name=".MainActivity" image shown
QUESTION
I made a bubble sort implementation in C, and was testing its performance when I noticed that the -O3
flag made it run even slower than no flags at all! Meanwhile -O2
was making it run a lot faster as expected.
Without optimisations:
...ANSWER
Answered 2021-Oct-27 at 19:53It looks like GCC's naïveté about store-forwarding stalls is hurting its auto-vectorization strategy here. See also Store forwarding by example for some practical benchmarks on Intel with hardware performance counters, and What are the costs of failed store-to-load forwarding on x86? Also Agner Fog's x86 optimization guides.
(gcc -O3
enables -ftree-vectorize
and a few other options not included by -O2
, e.g. if
-conversion to branchless cmov
, which is another way -O3
can hurt with data patterns GCC didn't expect. By comparison, Clang enables auto-vectorization even at -O2
, although some of its optimizations are still only on at -O3
.)
It's doing 64-bit loads (and branching to store or not) on pairs of ints. This means, if we swapped the last iteration, this load comes half from that store, half from fresh memory, so we get a store-forwarding stall after every swap. But bubble sort often has long chains of swapping every iteration as an element bubbles far, so this is really bad.
(Bubble sort is bad in general, especially if implemented naively without keeping the previous iteration's second element around in a register. It can be interesting to analyze the asm details of exactly why it sucks, so it is fair enough for wanting to try.)
Anyway, this is pretty clearly an anti-optimization you should report on GCC Bugzilla with the "missed-optimization" keyword. Scalar loads are cheap, and store-forwarding stalls are costly. (Can modern x86 implementations store-forward from more than one prior store? no, nor can microarchitectures other than in-order Atom efficiently load when it partially overlaps with one previous store, and partially from data that has to come from the L1d cache.)
Even better would be to keep buf[x+1]
in a register and use it as buf[x]
in the next iteration, avoiding a store and load. (Like good hand-written asm bubble sort examples, a few of which exist on Stack Overflow.)
If it wasn't for the store-forwarding stalls (which AFAIK GCC doesn't know about in its cost model), this strategy might be about break-even. SSE 4.1 for a branchless pmind
/ pmaxd
comparator might be interesting, but that would mean always storing and the C source doesn't do that.
If this strategy of double-width load had any merit, it would be better implemented with pure integer on a 64-bit machine like x86-64, where you can operate on just the low 32 bits with garbage (or valuable data) in the upper half. E.g.,
QUESTION
These two loops are equivalent in C++ and Rust:
...ANSWER
Answered 2022-Jan-12 at 10:20Overflow in the iterator state.
The C++ version will loop forever when given a large enough input:
QUESTION
The following code:
...ANSWER
Answered 2021-Dec-20 at 22:26It's all slightly mysterious. gcc behaves the same as clang.
The standard has this to say (emphasis mine):
Absent default member initializers, if any non-static data member of a union has a non-trivial default constructor, copy constructor, move constructor, copy assignment operator, move assignment operator, or destructor, the corresponding member function of the union must be user-provided or it will be implicitly deleted for the union.
But I think the wording is a bit wooly here. I think what they actually mean is that you must provide an initialiser for the member that has (in your example) a non-trivial constructor, like so:
QUESTION
In the following example function f()
returning incomplete type A
is marked as deleted:
ANSWER
Answered 2021-Dec-19 at 10:26Clang is wrong.
[dcl.fct.def.general]
2 The type of a parameter or the return type for a function definition shall not be a (possibly cv-qualified) class type that is incomplete or abstract within the function body unless the function is deleted ([dcl.fct.def.delete]).
That's pretty clear I think. A deleted definition allows for an incomplete class type. It's not like the function can actually be called in a well-formed program, or the body is actually using the incomplete type in some way. The function is a placeholder to signify an invalid result to overload resolution.
Granted, the parameter types are more interesting in the case of actual overload resolution (and the return type can be anything), but there is no reason to restrict the return type into being complete here either.
QUESTION
I'm not experienced so I can't really pinpoint what is the problem. Thanks for the help.
I cloned this repo: https://github.com/flatlogic/react-native-starter.git
And was trying to follow the steps below:
Clone the repogit clone https://github.com/flatlogic/react-native-starter.git
Navigate to clonned folder and Install dependenciescd react-native-starter && yarn install
Install Podscd ios && pod install
When I got to the pod install I'm getting that error.
...ANSWER
Answered 2021-Jul-28 at 18:31I think your pod install
working fine and has done its job. You need to set up iPhone SDK on your mac then try to run cd ../ && react-native run-ios
.
Follow this guide : React Native Environment set up on Mac OS with Xcode and Android Studio
QUESTION
#include
int main()
{
auto f1 = [](auto&) mutable {};
static_assert(std::is_invocable_v); // ok
auto const f2 = [](auto&) {};
static_assert(std::is_invocable_v); // ok
auto const f3 = [](auto&) mutable {};
static_assert(std::is_invocable_v); // failed
}
...ANSWER
Answered 2021-Dec-10 at 19:09You get an error for this for the very same reason:
QUESTION
C++20 introduced std::span
, which is a view-like object that can take in a continuous sequence, such as a C-style array, std::array
, and std::vector
. A common problem with a C-style array is it will decay to a pointer when passing to a function. Such a problem can be solved by using std::span
:
ANSWER
Answered 2021-Nov-27 at 02:27The question is not why this fails for int[]
, but why it works for all the other types! Unfortunately, you have fallen prey to ADL which is actually calling std::size
instead of the size
function you have written. This is because all overloads of your function fail, and so it looks in the namespace of the first argument for a matching function, where it finds std::size
. Rerun your program with the function renamed to something else:
QUESTION
The following program throws nullptr
and then catches the exception as int*
:
ANSWER
Answered 2021-Nov-03 at 18:21Looks like a bug in Visual Studio, according to the standard [except.handle]:
A handler is a match for an exception object of type
E
if[...]
- the handler is of type
cv T
orconst T&
whereT
is apointer
orpointer-to->member
type andE
isstd::nullptr_t
.
QUESTION
If one defines a new variable in C++, then the name of the variable can be used in the initialization expression, for example:
...ANSWER
Answered 2021-Oct-06 at 22:12According to the C++17 standard (11.3.6 Default arguments)
9 A default argument is evaluated each time the function is called with no argument for the corresponding parameter. A parameter shall not appear as a potentially-evaluated expression in a default argument. Parameters of a function declared before a default argument are in scope and can hide namespace and class member name
It provides the following example:
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