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How to copy a dictionary and only edit the copy
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Python never implicitly copies objects. When you set dict2 = dict1, you are making them refer to the same exact dict object, so when you mutate it, all references to it keep referring to the object in its current state.
If you want to copy the dict (which is rare), you hav...
Count, size, length…too many choices in Ruby?
...h an SQL
COUNT query. You can also specify conditions to count only a subset of
the associated elements (e.g. :conditions => {:author_name =>
"josh"}). If you set up a counter cache on the association, #count
will return that cached value instead of executing a new query.
post.com...
Is there a ceiling equivalent of // operator in Python?
I found out about the // operator in Python which in Python 3 does division with floor.
7 Answers
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Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...field :password in the @resource.errors there would be a [:password] error set.
– Mosselman
Mar 21 '12 at 16:16
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How to get row from R data.frame
...y R-ish. Try:
x[ x$A ==5 & x$B==4.25 & x$C==4.5 , ]
Or:
subset( x, A ==5 & B==4.25 & C==4.5 )
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ReactJS render string with non-breaking spaces
..., "\u00a0").replace(/\n/g, '<br/>');
return (
<div dangerouslySetInnerHTML={{__html: str}} ></div>
)
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How do I flush the PRINT buffer in TSQL?
...inued at least until 2k, but then I stopped the script. declare @i int set @i = 0 declare @t varchar(100) while 1=1 begin set @i = @i + 1 set @t = 'print ' + convert(varchar, @i) RAISERROR (@t, 10, 1) WITH NOWAIT waitfor delay '00:00:00.010' end
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libcurl网络连接使用tcp/ip - C/C++ - 清泛网 - 专注C/C++及内核技术
...l网络连接使用tcp ip，部分代码如下：CURL *curl;CURLcode res;const char *request = "GETas.xxxxE测试发送"; curl_socket_t sockfd; * socket * ...部分代码如下：
CURL *curl;
CURLcode res;
const char *request = "GETas.xxxxE测试发送";
curl_socket_t sockfd; /* socket */
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IF statement: how to leave cell blank if condition is false (“” does not work)
... is a valid option.
Also, count(a:a) will not count cells which have been set to n/a by doing this.
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What Regex would capture everything from ' mark to the end of a line?
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