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Is it better practice to use String.format over string Concatenation in Java?
Is there a perceptible difference between using String.format and String concatenation in Java?
14 Answers
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How do I check if a SQL Server text column is empty?
... upvoted, but ... where ISNULL( TRIM( Field), '') = '' is even better ;-), if you feel that " " is an Empty string even with spaces inside
– Kirsten
Jun 13 '19 at 7:26
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Get UIScrollView to scroll to the top
...RIGINAL
[self.scrollView setContentOffset:CGPointZero animated:YES];
or if you want to preserve the horizontal scroll position and just reset the vertical position:
[self.scrollView setContentOffset:CGPointMake(self.scrollView.contentOffset.x, 0)
animated:YES];
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What does “%.*s” mean in printf?
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You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than hard coding it into the format string, i.e.
void f(const char *str, int str_len)
{
printf("%.*s\n", str_len, str);
}
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XmlSerializer - There was an error reflecting type
...at serialized classes must have default (i.e. parameterless) constructors. If you have no constructor at all, that's fine; but if you have a constructor with a parameter, you'll need to add the default one too.
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What is the meaning of the 'g' flag in regular expressions?
...@xr280xr Not irrelevant, more like counterproductive. It will break things if you re-use the RegExp. var r = /a/g; console.log(r.test('a'), r.test('a')); // true false
– Janosch
Oct 7 '18 at 18:38
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ExecuteReader requires an open and available Connection. The connection's current state is Connectin
...Connection-Pool:
In practice, most applications use only one or a few different
configurations for connections. This means that during application
execution, many identical connections will be repeatedly opened and
closed. To minimize the cost of opening connections, ADO.NET uses an
opti...
File upload progress bar with jQuery
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Note: This question is related to the jQuery form plugin. If you are searching for a pure jQuery solution, start here.
There is no overall jQuery solution for all browser. So you have to use a plugin. I am using dropzone.js, which have an easy fallback for older browsers. Which plu...
Foreign Key to multiple tables
... This is also what we have in our software and I would avoid if you are trying to create a generic data access framework. This design will increase complexity in the app layer.
– Frank.Germain
May 12 '17 at 16:53
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Store query result in a variable using in PL/pgSQL
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What if I need multiple variables. Like select test_table.name, test_table.id, test_table.ssn?
– Dao Lam
Mar 5 '15 at 20:00
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