大约有 47,000 项符合查询结果（耗时：0.0611秒） [XML]
Printing all global variables/local variables?
...
In case you want to see the local variables of a calling function use select-frame before info locals
E.g.:
(gdb) bt
#0 0xfec3c0b5 in _lwp_kill () from /lib/libc.so.1
#1 0xfec36f39 in thr_kill () from /lib/libc.so.1
#2 0xfebe3603 in raise () from /lib/libc.so.1
#3 0xfebc2961 in abort () f...
How do you automatically set text box to Uppercase?
...ly expanded version should resolve that
<input oninput="let p=this.selectionStart;this.value=this.value.toUpperCase();this.setSelectionRange(p, p);" />
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What is the difference between a pseudo-class and a pseudo-element in CSS?
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The CSS 3 selector recommendation is pretty clear about both, but I'll try to show the differences anyway.
Pseudo-classes
Official description
The pseudo-class concept is introduced to permit selection based on information that l...
In SQL, what's the difference between count(column) and count(*)?
...a values(null,1)
insert #bla values(1,null)
insert #bla values(null,null)
select count(*),count(id),count(id2)
from #bla
results
7 3 2
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Picking a random element from a set
... the buckets that make up the hashset, which allows us to more efficiently select a random elements. If random elements are necessary in Java, it might be worthwhile to define a custom hash set that allows the user to look under the hood. See [boost's docs][1] for a little more in this. [1] boos...
Laravel Eloquent: Ordering results of all()
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Note, you can do:
$results = Project::select('name')->orderBy('name')->get();
This generate a query like:
"SELECT name FROM proyect ORDER BY 'name' ASC"
In some apps when the DB is not optimized and the query is more complex, and you need prevent gener...
Best way to check if object exists in Entity Framework?
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hi. how can we check if it exists and after that select all its data?
– virtouso
Apr 7 '15 at 1:27
1
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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...t; 1; };
var fnVal = function (v, c) { return v; };
return myUtils.select(h, fnSel, fnVal);
}
};
This assumes that each and filter are defined for arrays, and that we have two utility methods:
myUtils.keys(hash): returns an
array with the keys of the hash
myUtils.select(hash, fnSelect...
Undo part of unstaged changes in git
...ier if you use a good editor mode or plugin, which may provide support for selecting lines directly to revert, as -p can be a bit clumsy to use sometimes. I use Magit, an Emacs mode that is very helpful for working with Git. In Magit, you can run magit-status, find the diffs for the changes that you...
How to generate a new Guid in stored procedure?
... using SQL Server. I'm sure other database system have similar functions.
select NEWID()
If you're using Oracle then you can use the SYS_GUID() function. Check out the answer to this question: Generate a GUID in Oracle
sh...