I nearly was margin called on Binance

UNFI/USDT grown in 280% and I nearly was margin called:

but, fortunately, I earned $30.

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Viewing image metadata on Ubuntu 22.04

sudo apt install imagemagick
identify -verbose my-image.jpg
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Make QML menu width fit the content

Found an implementation here and added two pixels:

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts

Menu {
    width: {
        var result = 0;
        var padding = 0;
        for (var i = 0; i < count; ++i) {
            var item = itemAt(i);
            result = Math.max(item.contentItem.implicitWidth, result);
            padding = Math.max(item.padding, padding);
        }
        // It looks like two pixels are missing to remove the ellipsis.
        // My first idea was that it is leftInset + rightInset, but it does not work.
        var missing = 2;
        return result + padding * 2 + missing;
    }
}
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Converting MP4 to GIF with ffmpeg

I was able to convert MP4 to GIF with ffmpeg with the following commands on Ubuntu 22.04:

ffmpeg \
  -i iphone884.mp4 \
  -r 15 \
  -vf "scale=512:-1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
  -ss 00:00:03 -to 00:00:06 \
  iphone884.gif

ffmpeg \
  -i iphone884.mp4 \
  -r 15 \
  -vf "scale=300:-1,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" \
  iphone884.gif

Move assignment operator in C++

Implicitly-declared move assignment operator

If no user-defined move assignment operators are provided for a class type, and all of the following is true:

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Earned $50 on Binance with my Trading Bot

I have a home made Trading Bot that short coins on Binance with some simple strategy:

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Examples of C++/Objective-C interop

From QT’s Purchasing:

//SKProductsRequestDelegate
-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
    NSArray<SKProduct *> *products = response.products;
    SKProduct *product = [products count] == 1 ? [[products firstObject] retain] : nil;

    if (product == nil) {
        //Invalid product ID
        NSString *invalidId = [response.invalidProductIdentifiers firstObject];
        QMetaObject::invokeMethod(backend, "registerQueryFailure", Qt::AutoConnection, Q_ARG(QString, QString::fromNSString(invalidId)));
    } else {
        //Valid product query
        //Create a IosInAppPurchaseProduct
        IosInAppPurchaseProduct *validProduct = new IosInAppPurchaseProduct(product, backend->productTypeForProductId(QString::fromNSString([product productIdentifier])));
        if (validProduct->thread() != backend->thread()) {
            validProduct->moveToThread(backend->thread());
            QMetaObject::invokeMethod(backend, "setParentToBackend", Qt::AutoConnection, Q_ARG(QObject*, validProduct));
        }
        QMetaObject::invokeMethod(backend, "registerProduct", Qt::AutoConnection, Q_ARG(IosInAppPurchaseProduct*, validProduct));
    }

    [request release];
}
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Copy a file with CMake

Copy Podfile at the build stage:

message("Copy ${CMAKE_CURRENT_SOURCE_DIR}/Podfile -> ${CMAKE_BINARY_DIR}")
add_custom_target(copy_podfile
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        "${CMAKE_CURRENT_SOURCE_DIR}/Podfile"
        "${CMAKE_BINARY_DIR}"
    COMMENT "Copying Podfile"
)
add_dependencies(${PROJECT_NAME} copy_podfile)

Copy Podfile at the configuration stage:

execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
    "${CMAKE_CURRENT_SOURCE_DIR}/Podfile"
    "${CMAKE_BINARY_DIR}"
)

The right way to build Yandex Mobile Ads Example for iOS

To build the example with CocoaPods do the following steps:

Install build tools

Install Ruby with rbenv on macOS and install CocoaPods without sudo:

gem install cocoapods
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Installing Ruby with rbenv on macOS

Install Homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Install rbenv

brew install rbenv
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