大约有 44,000 项符合查询结果(耗时:0.0629秒) [XML]
How to do ToString for a possibly null object?
...efore, while it maybe appears elegant, the cast is almost always necessary and is not that succinct in practice.
As suggested elsewhere, I recommend maybe using an extension method to make this cleaner:
public static string ToStringNullSafe(this object value)
{
return (value ?? string.Empty).ToS...
How to update a pull request from forked repo?
So I first forked a repo and then made a commit to that forked repo. I then opened a pull request. The pull request listed all the changes I wanted.
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Checking if sys.argv[x] is defined
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In the end, the difference between try, except and testing len(sys.argv) isn't all that significant. They're both a bit hackish compared to argparse.
This occurs to me, though -- as a sort of low-budget argparse:
arg_names = ['command', 'x', 'y', 'operation', 'option']
...
PostgreSQL DISTINCT ON with different ORDER BY
...ll row that contains the most recent purchased product for each address_id and that result sorted by purchased_at then you're trying to solve a greatest N per group problem which can be solved by the following approaches:
The general solution that should work in most DBMSs:
SELECT t1.* FROM purcha...
How can I resolve “Error: No developer directory found at /Developer”?
I just upgraded XCode to 4.3.1.
I'm using a script to build (and then deploy through Testflight) my app.
But I now receive this error:
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How do I install Eclipse Marketplace in Eclipse Classic?
...r the Helios Repository is download.eclipse.org/releases/helios - in the standalone version of Adobe ColdFusion Builder 2 which is based on Eclipse 3.6.1, the Helios update repository is not listed.
– Danlance
Jul 8 '11 at 15:06
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AngularJS 1.2 $injector:modulerr
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Hmm, I'm using bower, and it provides .map files - I wonder why Chrome was still showing me errors from the minified file. Thanks for the heads up, @Mart!
– Aditya M P
Sep 8 '13 at 21:02
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How to compare only date components from DateTime in EF?
I am having two date values, one already stored in the database and the other selected by the user using DatePicker. The use case is to search for a particular date from the database.
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How to get temporary folder for current user
...n checks for the existence of environment variables in the following order and uses the first path found:
The path specified by the TMP environment variable.
The path specified by the TEMP environment variable.
The path specified by the USERPROFILE environment variable.
The Windows directory.
It'...
npm not working - “read ECONNRESET”
...registry.npmjs.org/
so that npm requests for http url instead of https.
and then try the same npm install command
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