大约有 7,000 项符合查询结果(耗时:0.0297秒) [XML]

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How to do an update + join in PostgreSQL?

... coming from mysql it's unintuitive that the same join used for select won't also update just by adding a set phrase :( still - the syntax for this is probably easier for a newcomer to sql to master. – WEBjuju ...
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How do I create a URL shortener?

...Take an auto-generated, unique numerical key (the auto-incremented id of a MySQL table for example). For this example, I will use 12510 (125 with a base of 10). Now you have to convert 12510 to X62 (base 62). 12510 = 2×621 + 1×620 = [2,1] This requires the use of integer division and modulo. A ...
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]

... I enhanced this solution using bOk = System.IO.Path.IsPathRooted(fileName); instead of bOk = true; – jing Sep 24 '13 at 7:12 ...
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How to use greater than operator with date?

... It bears noting that MySQL seems a bit picky about the date format; while either 2019/02/08 21:04:07 or 2019-02-08 21:04:07 produces the expected outcome, 02-08-2019 21:04:07, using the US date format, casts a much wider net. ...
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John Carmack's Unusual Fast Inverse Square Root (Quake III)

... function in the Quake III source code which calculates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster t...
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Nginx 403 forbidden for all files

...dn't also require x permission on parent directories is if it's running as root. – kolbyjack May 23 '14 at 12:46 I end...
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Absolute vs relative URLs

... @Mike why would you call root-relative URLs ‘absolute’? – törzsmókus Mar 22 '15 at 8:51 5 ...
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How to reference the initial commit?

...tional problem with your question: there can exist more than one such TAIL root commit (parentless commit) in a repository (even if we discount disconnected branches, such as 'html', 'man' and 'todo' in git.git repository). This is usually result of joining separate projects in one, or using subtree...
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Custom toast on Android: a simple example

...p://schemas.android.com/apk/res/android" android:id="@+id/toast_layout_root" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="10dp" android:background="#DAAA" > <ImageView android:id="@+id/im...
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Does Django scale? [closed]

...ormance as the load increases. We're using Apache front-ending Django and MySQL. The OS is Red Hat Enterprise Linux (RHEL). 64-bit. We use mod_wsgi in daemon mode for Django. We've done no cache or database optimization other than to accept the defaults. We're all in one VM on a 64-bit Dell ...