大约有 45,000 项符合查询结果（耗时：0.0800秒） [XML]
When/Why to use Cascading in SQL Server?
...ving history or using a "soft/logical delete" where you only set a deleted bit column to 1/true.
Cascade Update
Cascade Update may make sense when you use a real key rather than a surrogate key (identity/autoincrement column) across tables.
The canonical example for Cascade Update is when you ...
Use gulp to select and move directories and their files
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The Red PeaThe Red Pea
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a...
Force browser to clear cache
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Look into the cache-control and the expires META Tag.
<META HTTP-EQUIV="CACHE-CONTROL" CON...
Cannot push to Heroku because key fingerprint
...te "heroku"]
url = git@heroku.my_unique_key:myapp.git
That's it :) A bit complicated and a bit simple at the same time. It has taken me 3 years of banging my head against the wall and trial and error to discover this info. It should be clearly documented somewhere, but at least it's a start.
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SQL WHERE.. IN clause multiple columns
...hich might occur in a column, it gets tricky to ensure that the outcome is 100% accurate. The technical problem is that this method often incurs type conversions and completely ignores indexes, resulting in possibly horrible performance.
Despite these problems, I have to admit that I sometimes still...
Stopping fixed position scrolling at a certain point?
... the top" button that would be always above footer, I modified this code a bit. See my version here (js coffee): jsfiddle.net/9vnwx3fa/2
– Alb
Aug 19 '15 at 9:26
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What resources are shared between threads?
... Some systems even break DATA into SMALL DATA (accessible from a base + 16-bit offset) and (FAR) DATA (32-bit offset required to access). It's also possible that there is an extra TLS DATA (Thread Local Store) Segment which is generated on a per-thread basis
– Adisak
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Best way to reverse a string
...API for grapheme cluster iteration, which has been there since ever, but a bit "hidden" from view, it seems.
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How to write loop in a Makefile?
...s the same as the previous formulation as far as make is concerned, just a bit more compact).
A further bit of parameterisation so that you can specify a limit on the command-line (tedious as make does not have any good arithmetic macros, so I'll cheat here and use $(shell ...))
LAST := 1000
NUMBE...
What's the optimum way of storing an NSDate in NSUserDefaults?
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For the record - 32 bit floats have only 24 bits for accuracy, so 1970 to now is 40 years, which is 40*365*86400 seconds, and (40 * 365 * 86 400) / (2 ** 24) = 75second error. Double precision is what a DateTime interval, and its RAW precision i...