我只是为了更改包含搜索路径的顺序(我相信)。
/usr/local/include。
但它不会因为重复而改变。我该如何更改它？
我想有默认设置，因为出现了我没有指定的路径。比如/usr/include/c++/4.2.1, /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/包含
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -cc1 -triple x86_64-apple-macosx10.10.0 -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name test_common.cpp -mrelocation-model pic -pic-level 2 -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2 -target-linker-version 241.9 -v -gdwarf-2 -coverage-file /Users/machidahiroaki/RubymineProjects/caffe/.build_debug/src/caffe/test/test_common.o -resource-dir /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0 -D DEBUG -D CPU_ONLY -I /usr/local/include -I /usr/local/include -I /Users/machidahiroaki/anaconda/include -I /Users/machidahiroaki/anaconda/include/python2.7 -I /Users/machidahiroaki/anaconda/lib/python2.7/site-packages/numpy/core/include -I .build_debug/src -I ./src -I ./include -I /usr/local/atlas/include -stdlib=libstdc++ -O0 -Wall -Wno-sign-compare -Wno-unneeded-internal-declaration -fdeprecated-macro -fdebug-compilation-dir /Users/machidahiroaki/RubymineProjects/caffe -ferror-limit 19 -fmessage-length 0 -pthread -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime=macosx-10.10.0 -fencode-extended-block-signature -fcxx-exceptions -fexceptions -fdiagnostics-show-option -vectorize-slp -o .build_debug/src/caffe/test/test_common.o -x c++ src/caffe/test/test_common.cpp
clang -cc1 version 6.0 based upon LLVM 3.5svn default target x86_64-apple-darwin14.0.0
ignoring nonexistent directory "/usr/include/c++/4.2.1/i686-apple-darwin10/x86_64"
ignoring nonexistent directory "/usr/include/c++/4.0.0"
ignoring nonexistent directory "/usr/include/c++/4.0.0/i686-apple-darwin8/"
ignoring nonexistent directory "/usr/include/c++/4.0.0/backward"
ignoring duplicate directory "/usr/local/include"
ignoring duplicate directory "/usr/local/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/Users/machidahiroaki/anaconda/include
/Users/machidahiroaki/anaconda/include/python2.7
/Users/machidahiroaki/anaconda/lib/python2.7/site-packages/numpy/core/include
.build_debug/src
./src
./include
/usr/local/atlas/include
/usr/include/c++/4.2.1
/usr/include/c++/4.2.1/backward
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
Machida-no-MacBook-Air:caffe machidahiroaki$ /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -v ...
@(#)PROGRAM:ld PROJECT:ld64-241.9
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h armv6m armv7m armv7em
Library search paths:
/usr/lib
/usr/local/lib
Framework search paths:
/Library/Frameworks/
/System/Library/Frameworks/
确定这是在 make 中完成的 ld。
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -dynamic -dylib -arch x86_64 -macosx_version_min 10.10.0 -t -o .build_debug/lib/libcaffe.so -L/usr/local/lib -L/usr/lib -L/usr/local/atlas/lib .build_debug/src/caffe/proto/caffe.pb.o .build_debug/src/caffe/proto/caffe_pretty_print.pb.o .build_debug/src/caffe/blob.o .build_debug/src/caffe/common.o .build_debug/src/caffe/data_transformer.o .build_debug/src/caffe/internal_thread.o .build_debug/src/caffe/layer_factory.o .build_debug/src/caffe/layers/absval_layer.o .build_debug/src/caffe/layers/accuracy_layer.o .build_debug/src/caffe/layers/argmax_layer.o .build_debug/src/caffe/layers/base_data_layer.o .build_debug/src/caffe/layers/bnll_layer.o .build_debug/src/caffe/layers/concat_layer.o .build_debug/src/caffe/layers/contrastive_loss_layer.o .build_debug/src/caffe/layers/conv_layer.o .build_debug/src/caffe/layers/cudnn_conv_layer.o .build_debug/src/caffe/layers/cudnn_pooling_layer.o .build_debug/src/caffe/layers/cudnn_relu_layer.o .build_debug/src/caffe/layers/cudnn_sigmoid_layer.o .build_debug/src/caffe/layers/cudnn_softmax_layer.o .build_debug/src/caffe/layers/cudnn_tanh_layer.o .build_debug/src/caffe/layers/data_layer.o .build_debug/src/caffe/layers/dropout_layer.o .build_debug/src/caffe/layers/dummy_data_layer.o .build_debug/src/caffe/layers/eltwise_layer.o .build_debug/src/caffe/layers/euclidean_loss_layer.o .build_debug/src/caffe/layers/flatten_layer.o .build_debug/src/caffe/layers/hdf5_data_layer.o .build_debug/src/caffe/layers/hdf5_output_layer.o .build_debug/src/caffe/layers/hinge_loss_layer.o .build_debug/src/caffe/layers/im2col_layer.o .build_debug/src/caffe/layers/image_data_layer.o .build_debug/src/caffe/layers/infogain_loss_layer.o .build_debug/src/caffe/layers/inner_product_layer.o .build_debug/src/caffe/layers/loss_layer.o .build_debug/src/caffe/layers/lrn_layer.o .build_debug/src/caffe/layers/memory_data_layer.o .build_debug/src/caffe/layers/multinomial_logistic_loss_layer.o .build_debug/src/caffe/layers/mvn_layer.o .build_debug/src/caffe/layers/neuron_layer.o .build_debug/src/caffe/layers/pooling_layer.o .build_debug/src/caffe/layers/power_layer.o .build_debug/src/caffe/layers/relu_layer.o .build_debug/src/caffe/layers/sigmoid_cross_entropy_loss_layer.o .build_debug/src/caffe/layers/sigmoid_layer.o .build_debug/src/caffe/layers/silence_layer.o .build_debug/src/caffe/layers/slice_layer.o .build_debug/src/caffe/layers/softmax_layer.o .build_debug/src/caffe/layers/softmax_loss_layer.o .build_debug/src/caffe/layers/split_layer.o .build_debug/src/caffe/layers/tanh_layer.o .build_debug/src/caffe/layers/threshold_layer.o .build_debug/src/caffe/layers/window_data_layer.o .build_debug/src/caffe/net.o .build_debug/src/caffe/solver.o .build_debug/src/caffe/syncedmem.o .build_debug/src/caffe/util/benchmark.o .build_debug/src/caffe/util/im2col.o .build_debug/src/caffe/util/insert_splits.o .build_debug/src/caffe/util/io.o .build_debug/src/caffe/util/math_functions.o .build_debug/src/caffe/util/upgrade_proto.o -framework Accelerate -lglog -lgflags -lprotobuf -lleveldb -lsnappy -llmdb -lboost_system -lhdf5_hl -lhdf5 -lopencv_core -lopencv_highgui -lopencv_imgproc -lpthread -lboost_thread-mt -lcblas -lstdc++ -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/lib/darwin/libclang_rt.osx.a
那么...这条路径 /usr/include/c++/4.2.1 来自哪里？
我得到了一些提示吗？
Machida-no-MacBook-Air:caffe machidahiroaki$ g++ -print-search-dirs
install: /usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/
programs: =/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/bin/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/bin/
libraries: =/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/lib/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/lib/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../:/lib/x86_64-apple-darwin14.0.0/5.0.0/:/lib/:/usr/lib/x86_64-apple-darwin14.0.0/5.0.0/:/usr/lib/
Machida-no-MacBook-Air:caffe machidahiroaki$ clang++ -print-search-dirs
programs: =/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin:/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
libraries: =/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0
M
不知道是不是跟问题有关...
Machida-no-MacBook-Air:caffe machidahiroaki$ gcc -print-search-dirs
install: /usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/
programs: =/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/libexec/gcc/x86_64-apple-darwin14.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/bin/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/bin/
libraries: =/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/lib/x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../../x86_64-apple-darwin14.0.0/lib/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../x86_64-apple-darwin14.0.0/5.0.0/:/usr/local/lib/gcc/x86_64-apple-darwin14.0.0/5.0.0/../../../:/lib/x86_64-apple-darwin14.0.0/5.0.0/:/lib/:/usr/lib/x86_64-apple-darwin14.0.0/5.0.0/:/usr/lib/
Machida-no-MacBook-Air:caffe machidahiroaki$ gcc --version
gcc (GCC) 5.0.0 20141005 (experimental)
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
等等，export CFLAGS="-I/path/to/preferred/HDF5/hdf5.h" 不会工作...
什么都不指定
Machida-no-MacBook-Air:caffe machidahiroaki$ echo | "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -Wp,-v -stdlib=libstdc++ -x c++ - -fsyntax-only
clang -cc1 version 6.0 based upon LLVM 3.5svn default target x86_64-apple-darwin14.0.0
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/4.2.1
/usr/include/c++/4.2.1/backward
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
无法指定头文件!!
Machida-no-MacBook-Air:caffe machidahiroaki$ echo | "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -Wp,-v -stdlib=libstdc++ -x c++ - -fsyntax-only -I/usr/local/include/hdf5.h
clang -cc1 version 6.0 based upon LLVM 3.5svn default target x86_64-apple-darwin14.0.0
ignoring nonexistent directory "/usr/local/include/hdf5.h"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/4.2.1
/usr/include/c++/4.2.1/backward
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
正如预期的那样，重复的目录被忽略并且顺序没有改变。
Machida-no-MacBook-Air:caffe machidahiroaki$ echo | "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" -Wp,-v -stdlib=libstdc++ -x c++ - -fsyntax-only -I/usr/local/include/
clang -cc1 version 6.0 based upon LLVM 3.5svn default target x86_64-apple-darwin14.0.0
ignoring duplicate directory "/usr/local/include"
as it is a non-system directory that duplicates a system directory
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/4.2.1
/usr/include/c++/4.2.1/backward
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
但是，我发现了clang的-include选项，它可以指定一个文件!
最佳答案
I'd like to change library search path...
在编译时，您使用 -L 扩充库搜索路径.您不能删除路径；您只能添加比现有路径具有“更高”偏好的路径。
在运行时，您使用 DYLD_LIBRARY_PATH , DYLD_FALLBACK_LIBRARY_PATH和 friend 一起更改库搜索路径。参见 dyld(1) OS X Man Pages .
通常你使用DYLD_LIBRARY_PATH以确保加载特定库而不是系统库。它是一种覆盖默认行为的方法。 DYLD_FALLBACK_LIBRARY_PATH用于提供不是系统库的库。它的侵入性较小，因为您不会替换系统路径。
I need /usr/local/include first...
对我来说听起来有点奇怪，但是......
$ export DYLD_LIBRARY_PATH=/usr/local/include
$ clang ...
如果你是从命令行交叉编译的，你应该做这样的事情。诀窍是使用 --sysroot自动引入平台的头文件和库，而不是用 -I 破解它们, -L和 -l .
# Put cross compile tools on the PATH first
export PATH="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/:$PATH"
# C compiler
export CC=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
# C++ compiler
export CXX=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
# SYSROOT brings in platform headers and libraries, No need for -I, -L and -l.
SYSROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk
# Compiler flags
export CFLAGS="-march armv7 -march armv7s --sysroot=$SYSROOT"
# Compiler flags
export CXXFLAGS="-march armv7 -march armv7s --sysroot=$SYSROOT"
# Using defualt C++ runtime
$CXX $CXXFLAGS foo.c -o foo.exe
您还可以使用 -stdlib=libstdc++ 指定 GNU 的运行时, 和 LLVM 的运行时 -stdlib=libc++ .
根据您的更新:
<ld command and output omitted>
where does this path /usr/include/c++/4.2.1 come from??
/usr/include/c++/4.2.1 不在您的库搜索路径中。它只是不存在。
这是一个 header 包含路径，您用 -I 指定它.
如果您想查看 header 包含 libstdc++ 的路径和 libc++ ，这样做:
# GNU C++ runtime
$ echo | /usr/local/bin/clang++ -Wp,-v -stdlib=ibstdc++ -x c++ - -fsyntax-only
和:
# LLVM C++ runtime
$ echo | /usr/local/bin/clang++ -Wp,-v -stdlib=libc++ -x c++ - -fsyntax-only
这是我在 OS X 10.8.5 上得到的结果:
libstdc++ (GNU):
/usr/include/c++/4.2.1
/usr/include/c++/4.2.1/backward
/usr/local/include
/usr/local/bin/../lib/clang/3.5.0/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory
libc++ (LLVM):
/usr/local/include
/usr/local/bin/../lib/clang/3.5.0/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
所以 /usr/include/c++/4.2.1是使用 GNU 的 libstdc++ 时的内置编译器路径(但不是 LLVM 的 libc++ )。我会更进一步，告诉你它在 LLVM/Clang 源代码中的硬编码(我经常从源代码构建 LLVM/Clang):
$ cd clang-sources/llvm
$ grep -R "/usr/include/c++/4.2.1" *
tools/clang/lib/Frontend/InitHeaderSearch.cpp: AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
tools/clang/lib/Frontend/InitHeaderSearch.cpp: AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
tools/clang/lib/Frontend/InitHeaderSearch.cpp: AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
tools/clang/lib/Frontend/InitHeaderSearch.cpp: AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
tools/clang/lib/Frontend/InitHeaderSearch.cpp: AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
在使用 --with-c-include-dirs 构建 LLVM/Clang 时，您可以添加额外的包含路径.
根据您的评论:“...如果我删除 ~/anaconda/include/hdf5.h...”。如果您需要 HDF5 包的新路径，请使用如下内容:
export CPPFLAGS="-I/path/to/preferred/HDF5/hdf5.h"
export CFLAGS="-I/path/to/preferred/HDF5/hdf5.h"
export CXXFLAGS="-I/path/to/preferred/HDF5/hdf5.h"
export LDFLAGS="-L/path/to/preferred/HDF5/lib"
./configure ...
您在 CPPFLAGS 中需要它也是因为自动工具可能会用它运行一些测试。
然后，在运行时:
export DYLD_LIBRARY_PATH=/path/to/preferred/HDF5/lib
./run_the_executable
你可以回避DYLD_LIBRARY_PATH 如果您对 HDF5 执行静态链接。但请注意，OS X 链接器总是使用共享对象或 dynalib 如果它可用。实际上，它会忽略您对静态链接的请求。你必须 mv共享对象或 dynalib 偏离路径，同时将存档保留在路径上。
把水搅得更浑一点……如果你说的是“库”，而你真的想说“框架”，那么请参阅 Stack Overflow 关于使用 -framework 的问题选项:Clang(LLVM) compile with frameworks .
关于c++ - 在 Mac OS X Yosemite 10.10.1 上包含搜索路径，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27948093/
为了将Cucumber用于命令行脚本，我按照提供的说明安装了arubagem。它在我的Gemfile中，我可以验证是否安装了正确的版本并且我已经包含了require'aruba/cucumber'在'features/env.rb'中为了确保它能正常工作，我写了以下场景:@announceScenario:Testingcucumber/arubaGivenablankslateThentheoutputfrom"ls-la"shouldcontain"drw"假设事情应该失败。它确实失败了，但失败的原因是错误的:@announceScenario:Testingcucumber/ar
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我有一个包含多个键的散列和一个字符串，该字符串不包含散列中的任何键或包含一个键。h={"k1"=>"v1","k2"=>"v2","k3"=>"v3"}s="thisisanexamplestringthatmightoccurwithakeysomewhereinthestringk1(withspecialcharacterslike(^&*$#@!^&&*))"检查s是否包含h中的任何键的最佳方法是什么，如果包含，则返回它包含的键的值？例如，对于上面的h和s的例子，输出应该是v1。编辑:只有字符串是用户定义的。哈希将始终相同。 最佳答案
我使用Nokogiri(Rubygem)css搜索寻找某些在我的html里面。看起来Nokogiri的css搜索不喜欢正则表达式。我想切换到Nokogiri的xpath搜索，因为这似乎支持搜索字符串中的正则表达式。如何在xpath搜索中实现下面提到的(伪)css搜索？require'rubygems'require'nokogiri'value=Nokogiri::HTML.parse(ABBlaCD3"HTML_END#my_blockisgivenmy_bl="1"#my_eqcorrespondstothisregexmy_eq="\/[0-9]+\/"#FIXMEThefoll
如何将send与+=一起使用？a=20;a.send"+=",10undefinedmethod`+='for20:Fixnuma=20;a+=10=>30 最佳答案 恐怕你不能。+=不是方法，而是语法糖。参见http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_expressions.html它说Incommonwithmanyotherlanguages,Rubyhasasyntacticshortcut:a=a+2maybewrittenasa+=2.你能做的最好的事情是:
如何使此根路径转到:“/dashboard”而不仅仅是http://example.com？root:to=>'dashboard#index',:constraints=>lambda{|req|!req.session[:user_id].blank?} 最佳答案 您可以通过以下方式实现:root:to=>redirect('/dashboard')match'/dashboard',:to=>"dashboard#index",:constraints=>lambda{|req|!req.session[:user_id].b
我对如何计算通过{%assignvar=0%}赋值的变量加一完全感到困惑。这应该是最简单的任务。到目前为止，这是我尝试过的:{%assignamount=0%}{%forvariantinproduct.variants%}{%assignamount=amount+1%}{%endfor%}Amount:{{amount}}结果总是0。也许我忽略了一些明显的东西。也许有更好的方法。我想要存档的只是获取运行的迭代次数。 最佳答案 因为{{incrementamount}}将输出您的变量值并且不会影响{%assign%}定义的变量，我
我的Gallery模型中有以下查询:media_items.includes(:photo,:video).rank(:position_in_gallery)我的图库模型有_许多媒体项，每个都有一个照片或视频关联。到目前为止，一切正常。它返回所有media_items包括它们的photo或video关联，由media_item的position_in_gallery属性排序。但是我现在需要将此查询返回的照片限制为仅具有is_processing属性的照片，即nil。是否可以进行相同的查询，但条件是返回的照片等同于:.where(photo:'photo.is_processingIS
我需要根据字符串路径的长度将字符串路径数组转换为符号、哈希和数组的数组给定以下数组:array=["info","services","about/company","about/history/part1","about/history/part2"]我想生成以下输出，对不同级别进行分组，根据级别的结构混合使用符号和对象。产生以下输出:[:info,:services,about:[:company,history:[:part1,:part2]]]#altsyntax[:info,:services,{:about=>[:company,{:history=>[:part1,:pa
寻找有用的ruby的好网站是什么？ 最佳答案 AgileWebDevelopment列出插件(虽然不是rubygems，我不确定为什么)，并允许人们对它们进行评级。RubyToolbox按类别列出gem并比较它们的受欢迎程度。Rubygems有一个搜索框。StackOverflow对最有用的rails插件和rubygems有疑问。 关于ruby-如何搜索有用的ruby，我们在StackOverflow上找到一个类似的问题： https://stacko