Author Archives: Tang

About Tang

A mobile developer, work in Stockholm, Sweden

How to delete an App from command line

1. List all simulators Find out all simulators xcrun simctl list Find out active simulator xcrun simctl list | grep Booted You will get the result like: $ xcrun simctl list |grep Booted iPhone 11 (AE8852AB-378E-47FB-BD23-4CF77BFBC6DC) (Booted) Now you can … Continue reading

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Combine Asynchronous Programming

1 Combine basics Combine is a declarative, reactive framework for processing asynchronous events over time. It aims to solve existing problems, like unifying tools for asynchronous programming, dealing with mutable state and making error handling a starting team player. Combine … Continue reading

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Configure Visual Studio Code for Swift development

1. Build sourcekit-lsp https://github.com/apple/sourcekit-lsp#building-sourcekit-lsp $ git clone https://github.com/apple/sourcekit-lsp.git $ swift package update $ swift build  The sourcekit-lsp will be here: /Users/zhihuitang/repo/common/sourcekit-lsp/.build/x86_64-apple-macosx/debug/sourcekit-lsp 2. Configure sourcekit-lsp In the sourcekit-lsp settings, set the Language Server Mode to sourcekit-lsp  Set Server Path: … Continue reading

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HOW TO RUN VISUAL STUDIO CODE FROM ZSH ON MAC OSX

Adding the codefunction to .zshrc file: function code { if [[ $# = 0 ]] then open -a "Visual Studio Code" else local argPath="$1" [[ $1 = /* ]] && argPath="$1" || argPath="$PWD/${1#./}" open -a "Visual Studio Code" "$argPath" fi … Continue reading

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MongoDB on Mac

1.What’s MongoDB? MongoDB is a document database which belongs to a family of databases called NoSQL – not only SQL. In MongoDB, records are documents which behave a lot like JSON objects in JavaScript. Values in documents can be looked … Continue reading

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Python3 Virtualenv Setup

Install python3 brew install python3 Pip3 is installed with Python3 Upgrade virtualenv To install virtualenv via pip run: pip install –upgrade virtualenv Create virtualenv virtualenv -p python3 python3-venv Activate the virtualenv source python3-venv/bin/activate Deactivate the virtualenv deactivate

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LLDB you should know

LLDB is a next generation, high-performance debugger. It is built as a set of reusable components which highly leverage existing libraries in the larger LLVM Project, such as the Clang expression parser and LLVM disassembler. LLDB is the default debugger … Continue reading

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Xcode instruments

 The two columns worth noting in Instruments are # Persistent and # Transient. The Persistent column keeps a count of the number of objects of each type that currently exist in memory. The Transient column shows the number of … Continue reading

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Git tips

How do I discard changes in my working copy that are not in the index? git stash save –keep-index –include-untracked You don't need to include –include-untracked if you don't want to be thorough about it. or drop the stash git … Continue reading

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Views vs. layers

A layer is a simple model class that exposes a number of properties to represents some image-based content. Every UIView is backed by a layer, so you can think of layers as the lower-level behind the scenes class behind your … Continue reading

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