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How do I search within an array of hashes by hash values in ruby?
...lect (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation, it "returns an array containing all elements of [the enumerable, in this case @fathers] fo...
git index.lock File exists when I try to commit, but cannot delete the file
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How does the “this” keyword work?
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I recommend reading Mike West's article Scope in JavaScript (mirror) first. It is an excellent...
Automatically creating directories with file output [duplicate]
...s.makedirs calls, so that to protect us from race conditions.
In Python 3.2+, there is a more elegant way that avoids the race condition above:
import os
filename = "/foo/bar/baz.txt"
os.makedirs(os.path.dirname(filename), exist_ok=True)
with open(filename, "w") as f:
f.write("FOOBAR")
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%d,%c,%s,%x等转换符 释义 - C/C++ - 清泛IT论坛，有思想、有深度
...符号十进制整数
%o 八进制整数 e.g. 0123
%x(%X) 十六进制整数0f(0F) e.g. 0x1234
%p 指针
%s 字符串 %S Unicode字符串（双字节）
%% "%"
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Checkout old commit and make it a new commit [duplicate]
On Git, say I mess up my commits, and I want to make the version 3 commits ago as the new version. If I do git checkout xxxx , it creates a new branch and it seems like I can only merge it? Could I make this the new "master version"?
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Should I use char** argv or char* argv[]?
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answered Apr 23 '09 at 2:59
Johannes Schaub - litbJohannes Schaub - litb
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CodeIgniter removing index.php from url
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Why do I get “Pickle - EOFError: Ran out of input” reading an empty file?
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132
I would check that the file is not empty first:
import os
scores = {} # scores is an empty di...