compilation

问题 This question was migrated from Software Engineering Stack Exchange because it can be answered on Stack Overflow. Migrated 4 years ago . What exactly is the difference between using either ' var ' or ' let ' in Typescript? I know that 'let' allows the variable to be defined further into a scope without it being used outside of said scope. That is obviously a nice advantage for iterators in for loops. I know this is an ES6 definition, so compiling to ES6 should look nearly identical in terms

问题 Trying to upgrade to JDK8 on a big project, compilation goes really slow on JDK8 compared to JDK7. Running the compiler in verbose mode, JDK8 compiler stops at a big generated converter class(Mapping) for entities from server to client. The converter methods in several cases call other converter methods from the same Mapping class. As a workaround tried to split the Mapping file into multiple files. This visibly improved performance when only compiling the Mapping class or it's containing

问题 I have a rather length project I'm working on, which requires an older JDK to compile correctly, various JAR includes, and the like. I'm assembling the entire project using a batch script, and I'd like to make the whole process fully automated with the script. So I was wondering if I could view the shell commands Eclipse does to make a particular piece of code turn into a JAR (from compiling with the appropriate JDK I specified to making the JAR), so I don't need to manually go in and waste a

问题 I accidentally deleted a .class (Java bytecode) file in my project (on the filesystem, not using Eclipse itself). Easy to fix, right? Just re-build it. But that doesn't work! Even if I select "Build Project" or "Build All" or "Build Automatically" from the "Project" menu, nothing actually happens on the file system, and I still get: Exception in thread "main" java.lang.NoClassDefFoundError I just want to re-compile this from the source code I already have! By the way, when I choose "Clean..."

问题 Really off the wall question here, but is there a way to compile a string of C code in GCC without any medium to hold that string (eg. a source file)? Something along the lines of: $ gcc "#include <stdio.h> int main( void ){ printf('hello world'); return 0;}" -o test Feels really dirty, but it would be really nice if there was some simple way to do that type of thing. 回答1: If you use - as the input file in the command line, gcc reads from standard input. Since there is no file name extension

问题 I need to build boost to use the regex library. I was able to creat bjam using bootstrap.sh like so: ./bootstrap.sh --with-toolset=mingw Note - if I leave out the --with-toolset=mingw argument compilation fails - bootstrap can't find wait.h, resource.h, ar.h. With the mingw toolset argument, bjam is able to compile. Then I run bjam and get: ./bjam.exe mingw.jam: No such file or directory e:/libraries/boost_1_45_0/tools/build/v2/build\toolset.jam:38: in toolset.using rule mingw.init unknown in

问题 I am trying to write ant build for compiling source folder here is my script target for compiling. <target name="compile" depends="init"> <javac srcdir="${src.dir}" destdir="${classes.dir}" debug="true"> <classpath refid="master-classpath"/> </javac> </target> In my project I have near about 1000 .java files. When ever a single .java file is changed above target tends to compile all .java files. Which make development very slow. I just want to know is there any way or code to change the

问题 This question already has answers here : Advantage of switch over if-else statement (22 answers) Closed 6 years ago . I was wondering if there was any difference in the way the following code was compiled into assembly. I've heard that switch-case is more efficient than if else, but in this example I am not quite sure if that would be the case. if(x==1){ ... }else if(x==2){ ... }else{ ... } and switch(x){ case 1: ... break; case 2: ... break; default: ... } 回答1: A compiler will sometimes turn

问题 I installed Erlang 13B and tried to follow the tutorials. Every time I get to c(tut) , I get an error instead of (ok, tut) , so it seems like there are no modules installed. Can anyone point me in the right direction? I've tried Emacs but I don't really know how to use it and haven't even got close to getting the Erlang mode working. For instance, where do I type: (setq load-path (cons "C:/Program Files/erl5.6.2/lib/tools-<ToolsVer>/emacs" load-path)) (setq erlang-root-dir "C:/Program Files

问题 I was looking at some code a friend sent me, and he said: "It compiles, but doesn't work". I saw that he used the functions without the parentheses, something like this: void foo(){ cout<< "Hello world\n"; } int main(){ foo; //function without parentheses return 0; } The first I said was "use parentheses, you have to". And then I tested that code - it does compile, but when executed doesn't work (no "Hello world" shown). So, why does it compile (no warning at all from the compiler GCC 4.7 ),