不需任何費用。 • 留意參考循環，Arc 並不使用垃圾收集器進行偵測。 – std::sync::Weak 可協助執行這項功能。 314 61.2 Mutex Mutex ensures mutual exclusion and allows mutable access to T behind a read-only interface (another form of interior mutability): 專案，並使用以下指令，將 reqwest 設為依附元件： cargo new link-checker cd link-checker cargo add --features blocking,rustls-tls reqwest 如 果 cargo add 失 敗 並 顯 示 error: no such subcommand，請 手 動 編 輯 Cargo.toml 檔案。請新增下列依附元件。 您也需要設法找出連結。為此，我們可以使用 "2021" publish = false [dependencies] reqwest = { version = "0.11.12", features = ["blocking", "rustls-tls"] } scraper = "0.13.0" thiserror = "1.0.37" 您現在可以下載起始網頁。請以小型網站嘗試這項操作，例如 https://www.google.org/。

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() using the (internal) function Base.tls_world_age julia> function f end f (generic function with 0 methods) julia> begin @show (Int(Base.get_world_counter()), Int(Base.tls_world_age())) Core.eval(@__MODULE__

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() using the (internal) function Base.tls_world_age julia> function f end f (generic function with 0 methods) julia> begin @show (Int(Base.get_world_counter()), Int(Base.tls_world_age())) Core.eval(@__MODULE__

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() using the (internal) function Base.tls_world_age julia> function f end f (generic function with 0 methods) julia> begin @show (Int(Base.get_world_counter()), Int(Base.tls_world_age())) Core.eval(@__MODULE__

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() using the (internal) function Base.tls_world_age julia> function f end f (generic function with 0 methods) julia> begin @show (Int(Base.get_world_counter()), Int(Base.tls_world_age())) Core.eval(@__MODULE__

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. int main(int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() PEM-encoded certificate authority roots. By default, on systems like Windows and macOS where the built-in TLS engines know how to verify hosts using the system's built-in certificate verification mechanism, this

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. int main(int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() PEM-encoded certificate authority roots. By default, on systems like Windows and macOS where the built-in TLS engines know how to verify hosts using the system's built-in certificate verification mechanism, this

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() PEM-encoded certificate authority roots. By default, on systems like Windows and macOS where the built-in TLS engines know how to verify hosts using the system's built-in certificate verification mechanism, this

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() PEM-encoded certificate authority roots. By default, on systems like Windows and macOS where the built-in TLS engines know how to verify hosts using the system's built-in certificate verification mechanism, this

C program that initializes Julia and calls some Julia code: #include JULIA_DEFINE_FAST_TLS // only define this once, in an executable (not in a shared library) if you want fast code. �→ int the Julia C API from a thread started by Julia itself: #include JULIA_DEFINE_FAST_TLS double c_func(int i) { printf("[C %08x] i = %d\n", pthread_self(), i); // Call the Julia sqrt() PEM-encoded certificate authority roots. By default, on systems like Windows and macOS where the built-in TLS engines know how to verify hosts using the system's built-in certificate verification mechanism, this