是的，Julia的
我一直在尝试将两个字符串传递给diff命令行实用程序，以获得其在Julia中的图形并排比较功能。到目前为止，我的尝试包括以下内容：
s1 = "<very long multiline string 1>"
s2 = "<very long multiline string 2>"
# Results in LoadError: parsing command `diff -y <(echo $(s1)) <(echo $(s2))`:
# special characters "#{}()[]<>|&*?~;" must be quoted in commands
attempt1 = read(`diff -y <(echo $(s1)) <(echo $(s2))`, String)
# Results in diff: extra operand '<(echo'
attempt2 = read(`diff -y <(echo $(s1)) <(echo $(s2))`, String)
# Results in diff: missing operand after '<(echo
attempt3 = read(`diff -y "<(echo $(s1)) <(echo $(s2))"`, String)
# Results in diff: missing operand after '<(echo $(s1)) <(echo $(s2))'
attempt4 = read(`diff -y '<(echo $(s1)) <(echo $(s2))'`, String)
# Results in diff: <(echo <very long multiline string 1>: Filename too long
attempt5 = read(`diff -y <("echo $(s1)") <("echo $(s2)")`, String)
等等。字符串s1和s2是在脚本执行期间生成的，因此不能作为文件访问。我正试图用bash来绕过这一点；伪文件"；语法
diff -y <(command 1) <(command 2) ,
但Julia对命令字符串做了一些操作，使它们不会像在bash中那样操作。那么，我如何将两个字符串传递给Julia中的diff呢？
Cmd与bash不同。如果您不在Windows上，您可以使用FIFOStreams.jl包模拟bash行为
using FIFOStreams
s1 = """
Humpty Dumpty sat on a wall,
Humpty Dumpty had a great fall.
All the king's horses and all the king's men
Couldn't put Humpty together again.
"""
s2 = """
Humpty Dumpty sat on a wall,
Humpty Dumpty had a great fall.
Four-score Men and Four-score more,
Could not make Humpty Dumpty where he was before.
"""
s = FIFOStreamCollection(2)
io = IOBuffer()
attach(s, pipeline(ignorestatus(`diff -y $(path(s, 1)) $(path(s, 2))`); stdout = io))
fs1, fs2 = s
print(fs1, s1)
print(fs2, s2)
close(s)
结果
julia> println(String(take!(io)))
Humpty Dumpty sat on a wall, Humpty Dumpty sat on a wall
,
Humpty Dumpty had a great fall. Humpty Dumpty had a great f
all.
All the king's horses and all the king's men | Four-score Men and Four-sco
re more,
Couldn't put Humpty together again. | Could not make Humpty Dumpt
y where he was before.