大约有 44,000 项符合查询结果（耗时：0.0731秒） [XML]
How do I remove files saying “old mode 100755 new mode 100644” from unstaged changes in Git?
...xecutable bit changes on the filesystem so it won't view this as a change. If you do need to stage an executable bit change it does mean that you have to manually do git update-index --chmod=(+|-)x <path>.
– CB Bailey
Aug 11 '09 at 6:49
...
How to convert wstring into string?
... + ws.length(), from_next, &to[0], &to[0] + to.size(), to_next);
if (result == converter_type::ok or result == converter_type::noconv) {
const std::string s(&to[0], to_next);
std::cout <<"std::string = "<<s<<std::endl;
}
}
This will usually work for Li...
postgresql - add boolean column to table set default
... ADD COLUMN "priv_user" BOOLEAN DEFAULT FALSE;
you can also directly specify NOT NULL
ALTER TABLE users
ADD COLUMN "priv_user" BOOLEAN NOT NULL DEFAULT FALSE;
UPDATE: following is only true for versions before postgresql 11.
As Craig mentioned on filled tables it is more efficient to split i...
How to Programmatically Add Views to Views
...ect answer, but you need to do a little more than that to get it to work.
If you create a View via a constructor (e.g., Button myButton = new Button();), you'll need to call setLayoutParams on the newly constructed view, passing in an instance of the parent view's LayoutParams inner class, before y...
Joins are for lazy people?
...
Joining in the app server can be more efficient if joining on the database causes severe redundancy in the result set sent over the network. Consider tables A and B, where each row in A is associated with 20 rows in B, B has only 100 rows, and we want to fetch the first 10...
How to combine multiple conditions to subset a data-frame using “OR”?
I have a data.frame in R. I want to try two different conditions on two different columns, but I want these conditions to be inclusive. Therefore, I would like to use "OR" to combine the conditions. I have used the following syntax before with lot of success when I wanted to use the "AND" conditio...
Removing index column in pandas when reading a csv
...column(s), it is not a column, which is why del df['index'] did not work.
If you want to replace the index with simple sequential numbers, use df.reset_index().
To get a sense for why the index is there and how it is used, see e.g. 10 minutes to Pandas.
...
What is the difference between linear regression and logistic regression?
...) and link (log, logit, inverse-log, etc.) you use, the interpretation is different.
Error minimization technique
Linear regression uses ordinary least squares method to minimise the
errors and arrive at a best possible fit, while logistic regression
uses maximum likelihood method to arrive at the...
What's the difference of “./configure” option “--build”, “--host” and “--target”?
... --build , --host and --target . I'm confusing their roles. What's the difference and semantics of them?
2 Answers
...
How to enumerate an enum
...
This doesn't work if you have duplicate values in the enumerator list.
– Jessy
Jun 17 '12 at 3:50
10
...