大约有 41,000 项符合查询结果（耗时：0.0554秒） [XML]
How to rollback just one step using rake db:migrate
...think using VERSION=n is the right way to do that, but I don't know the correct value of n to use. Is there any command to check the current n value?
...
How to send an email using PHP?
...sing PHP's mail() function it's possible. Remember mail function will not work on a Local server.
<?php
$to = 'nobody@example.com';
$subject = 'the subject';
$message = 'hello';
$headers = 'From: webmaster@example.com' . "\r\n" .
'Reply-To: webmaster@example.com' . "\r\n" .
'X-Maile...
How can I calculate the time between 2 Dates in typescript
This works in Javascript
5 Answers
5
...
Find which commit is currently checked out in Git
...ifferent ways to view the commit you currently have checked out into your working copy during a git bisect session (note that options 1-4 will also work when you're not doing a bisect):
git show.
git log -1.
Bash prompt.
git status.
git bisect visualize.
I'll explain each option in detail below....
“wait_fences: failed to receive reply: 10004003”?
I get this cryptic error the first time (and only the first time) my view is loaded due to the following line of code:
18 A...
CursorLoader usage without ContentProvider
Android SDK documentation says that startManagingCursor() method is depracated:
5 Answers
...
Moving decimal places over in a double
...
If you use double or float, you should use rounding or expect to see some rounding errors. If you can't do this, use BigDecimal.
The problem you have is that 0.1 is not an exact representation, and by performing the calculation twice, you are...
npm install from Git in a specific version
Assumed that I have written a module for Node.js which I would like to keep private. I know that I can (should) add the line:
...
Is there a numpy builtin to reject outliers from a list
...
This method is almost identical to yours, just more numpyst (also working on numpy arrays only):
def reject_outliers(data, m=2):
return data[abs(data - np.mean(data)) < m * np.std(data)]
s...
Understanding dispatch_async
...he default queue over the main queue is to run tasks in the background.
For instance, if I am downloading a file from the internet and I want to update the user on the progress of the download, I will run the download in the priority default queue and update the UI in the main queue asynchronously...