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How do I remove background-image in css?
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Just use #a {}. Don't use element types in selectors unless necessary.
– Jezen Thomas
Jul 18 '12 at 14:51
3
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How to create war files
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I've always just selected Export from Eclipse. It builds the war file and includes all necessary files. Providing you created the project as a web project that's all you'll need to do. Eclipse makes it very simple to do.
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How to add a separator to a WinForms ContextMenu?
...er. I'm using VS 2012. You can add a separator via the forms designer.
1) Select/Create a MenuStrip.
2) On "Type Here", right mouse.
3) Select "Insert".
4) Select "Separator".
5) Drag the new separator to the text you want it to be above.
Done.
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Relational Database Design Patterns? [closed]
... codepages.
Give every column a unique name. This make it easer on join to select the column. It is very difficult if every table has a column "ID" or "Name" or "Description". Use XyzID and AbcID.
Use a resource bundle or equals for complex SQL expressions. It make it easer to switch to another DBMS...
What is the difference between trie and radix trie data structures?
...E is faster than Radix tree? Because in TRIE if you wan to search the next char you need to see the ith index in the child array of the current node but in radix tree you need search for all the child nodes sequentially. See the implementation code.google.com/p/radixtree/source/browse/trunk/RadixTre...
Difference between array_map, array_walk and array_filter
...ap(function ($a, $b) { return $a * $b; }, $origarray1, $origarray2)
);
// select only elements that are > 2.5
print_r(
array_filter($origarray1, function ($a) { return $a > 2.5; })
);
?>
</pre>
Result:
Array
(
[0] => 2
[1] => 2
[2] => 3
)
Array
(
[0] ...
How to simulate a mouse click using JavaScript?
...n;
}
var eventMatchers = {
'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
'MouseEvents': /^(?:click|dblclick|mouse(?:down|up|over|move|out))$/
}
var defaultOptions = {
pointerX: 0,
pointerY: 0,
button: 0,
ctrlKey: false,
...
How to copy from CSV file to PostgreSQL table with headers in CSV file?
...'','' quote ''"'' csv ', csv_file_path);
iter := 1;
col_first := (select col_1
from temp_table
limit 1);
-- update the column names based on the first row which has the column names
for col in execute format ('select unnest(string_to_array(trim(t...
R: Comment out block of code [duplicate]
...tors use something like command or control and single quote to comment out selected lines of code. In RStudio it's Command or Control+/. Check in your editor.
It's still commenting line by line, but they also uncomment selected lines as well. For the Mac RGUI it's command-option ' (I'm imagining...
Eclipse: Enable autocomplete / content assist
...efault in Eclipse you only have to press Ctrl-space for autocomplete. Then select the desired method and wait 500ms for the javadoc info to pop up.
If this doesn't work go to the Eclipse Windows menu -> Preferences -> Java -> Editor -> Content assist and check your settings here
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