大约有 44,500 项符合查询结果(耗时:0.0331秒) [XML]

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When to use ' (or quote) in Lisp?

...uments passed to it are evaluated. This means you can write this: (* (+ a 2) 3) Which in turn evaluates (+ a 2), by evaluating a and 2. The value of the symbol a is looked up in the current variable binding set, and then replaced. Say a is currently bound to the value 3: (let ((a 3)) (* (+...
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How to install mongoDB on windows?

...ng to test out mongoDB and see if it is anything for me. I downloaded the 32bit windows version, but have no idea on how to continue from now on. ...
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How to print binary tree diagram?

... 28 Answers 28 Active ...
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combinations between two lists?

...e looking for - see the other answers. Suppose len(list1) >= len(list2). Then what you appear to want is to take all permutations of length len(list2) from list1 and match them with items from list2. In python: import itertools list1=['a','b','c'] list2=[1,2] [list(zip(x,list2)) for x in ite...
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Hash Map in Python

... 253 Python dictionary is a built-in type that supports key-value pairs. streetno = {"1": "Sachin ...
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Bash set +x without it being printed

...o find a solution that doesn't use a subshell: set -x command { set +x; } 2>/dev/null share | improve this answer | follow | ...
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How does the extend() function work in jQuery?

...nd works, so I ran a little test: var a = {foo: 1, bar: 1}; var b = {foo: 2, baz: 2}; var c = {foo: 3}; var r = jQuery.extend(a,b,c); console.log("A: Foo=" + a.foo + " Bar=" + a.bar + " Baz=" + a.baz); console.log("B: Foo=" + b.foo + " Bar=" + b.bar + " Baz=" + b.baz); console.log("C: Foo=" + c.foo...
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搭建高可用mongodb集群(一)——配置mongodb - 大数据 & AI - 清泛网 - 专...

...test/single/data #进入mongodb文件夹 cd /data/mongodbtest/single 2、下载mongodb的安装程序包 wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.6.tgz #解压下载的压缩包 tar xvzf mongodb-linux-x86_64-2.4.6.tgz #进入mongodb程序执行文件夹 cd mon...
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Linux bcc tools使用总结(持续更新) - 操作系统(内核) - 清泛网 - 专注IT技能提升

...TIME(s) PCOMM PID PPID RET ARGS 0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo 0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname 0.998 ...
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Linux bcc tools使用总结(持续更新) - 操作系统(内核) - 清泛网 - 专注IT技能提升

...TIME(s) PCOMM PID PPID RET ARGS 0.996 head 12101 6578 0 /usr/bin/head -v -n 8 /proc/meminfo 0.996 head 12102 6578 0 /usr/bin/head -v -n 2 /proc/stat /proc/version /proc/uptime /proc/loadavg /proc/sys/fs/file-nr /proc/sys/kernel/hostname 0.998 ...