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psql: FATAL: database “” does not exist
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In my case i wrote $ createdb -h localhost to solve the error could not connect to database postgres: could not connect to server. After that i may connect to postgresql console via psql -h localhost.
– ExiRe
Jan 9 '14 at 14:23
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Deep Learning（深度学习）学习笔记整理系列之（一） - 大数据 & AI - 清泛...
...提并论的。要知道，人脑中可是有150多亿个神经元，互相连接的节点也就是突触数更是如银河沙数。曾经有人估算过，如果将一个人的大脑中所有神经细胞的轴突和树突依次连接起来，并拉成一根直线，可从地球连到月亮，再从...
Practical usage of setjmp and longjmp in C
...can be used practically in embedded programming? I know that these are for error handling. But I'd like to know some use cases.
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How do I count the number of occurrences of a char in a String?
...ore 0.010 better then 0.351):
Benchmark Mode Cnt Score Error Units
1. countMatches avgt 5 0.010 ± 0.001 us/op
2. countOccurrencesOf avgt 5 0.010 ± 0.001 us/op
3. stringTokenizer avgt 5 0.028 ± 0.002 us/op
4. java8_1 avgt 5 0.077 ...
An example of how to use getopts in bash
...f expected arguments,
h - check for option -h without parameters; gives error on unsupported options;
h: - check for option -h with parameter; gives errors on unsupported options;
abc - check for options -a, -b, -c; gives errors on unsupported options;
:abc - check for options -a, -b, -c; silence...
Add up a column of numbers at the Unix shell
...:-)
– Greg Reynolds
Jun 1 '09 at 10:05
2
One bracket too much in @dmckee's answer :)
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Python Dictionary Comprehension
...y:'your value here' for key in old_dict.keys()}
You're receiving a SyntaxError because when you write
d = {}
d[i for i in range(1, 11)] = True
you're basically saying: "Set my key 'i for i in range(1, 11)' to True" and "i for i in range(1, 11)" is not a valid key, it's just a syntax err...
Portable way to get file size (in bytes) in shell?
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Palec
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answered Nov 29 '09 at 13:45
Carl SmotriczCarl Smotricz
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Pretty-print C++ STL containers
...ally.)
– Kerrek SB
Jan 31 '11 at 12:05
Hmm, I get "ambiguous overload" when trying this on an std::vector<int> a...
Is there a built-in function to print all the current properties and values of an object?
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edited Oct 10 '08 at 20:05
S.Lott
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answere...