大约有 40,000 项符合查询结果（耗时：0.0620秒） [XML]
INSERT … ON DUPLICATE KEY (do nothing)
...es unique key or primary key, because it deletes the old entry then insert new one.
2. INSERT IGNORE
pros:
simple.
cons:
auto-increment key will not change if there is entry matches unique key or primary key but auto-increment index will increase by 1
some other errors/warnings will be i...
Disable orange outline highlight on focus
...aight out of the device as factory standard i would say... Tab2 was pretty new on the market at the time.
– Fivebears
Apr 30 '15 at 23:51
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How do I get the last four characters from a string in C#?
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Taking a couple of lines of code (which the OP already knew) and cramming it onto one line is not really the same thing as one expression.
– Buh Buh
Jun 20 '11 at 15:39
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Is there more to an interface than having the correct methods
...re a way to make your code more flexible. What you do is this:
Ibox myBox=new Rectangle();
Then, later, if you decide you want to use a different kind of box (maybe there's another library, with a better kind of box), you switch your code to:
Ibox myBox=new OtherKindOfBox();
Once you get used ...
Selecting last element in JavaScript array [duplicate]
...ent = array1[array1.length - 1];
or, in longer version, without creating new variables:
loc['f096012e-2497-485d-8adb-7ec0b9352c52'][loc['f096012e-2497-485d-8adb-7ec0b9352c52'].length - 1];
How to add a method for getting it simpler
If you are a fan for creating functions/shortcuts to fulfill s...
Echo newline in Bash prints literal \n
... echo "" works for me and I think it's the simplest form to print a new line, even if this doesn't directly answer the question. Cheers.
– Mario Awad
Mar 24 '14 at 20:00
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How can prepared statements protect from SQL injection attacks?
...ed as using the prepared statement example as below.
Sqlcommand command = new sqlcommand("select * from table where username = @userinput and password=@pass");
command.Parameters.Add(new SqlParameter("@userinput", 100));
command.Parameters.Add(new SqlParameter("@pass", 100));
command.prepare();
S...
Chai: how to test for undefined with 'should' syntax
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danieldaniel
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What is the effect of encoding an image in base64?
... a really helpful overview of when to base64 encode and when not to by David Calhoun.
Basic answer = gzipped base64 encoded files will be roughly comparable in file size to standard binary (jpg/png). Gzip'd binary files will have a smaller file size.
Takeaway = There's some advantage to encoding...
What is the best way to conditionally apply attributes in AngularJS?
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beware, however, that ng-if creates a new scope.
– Shimon Rachlenko
Jul 2 '14 at 8:59
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