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Prevent users from submitting a form by hitting Enter
...ys:
A form element's default button is the first submit button in tree order whose form owner is that form element.
If the user agent supports letting the user submit a form implicitly (for example, on some platforms hitting the "enter" key while a text field is focused implicitly submits t...
How to remove convexity defects in a Sudoku square?
... grid:
mask = FillingTransform[largestComponent]
Now, I can use a 2nd order derivative filter to find the vertical and horizontal lines in two separate images:
lY = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {2, 0}], {0.02, 0.05}], mask];
lX = ImageMultiply[Morphologica...
Fast way to discover the row count of a table in PostgreSQL
.... Postgres may need to consider more rows than the limit anyway (like with ORDER BY something while it can't use an index, or with aggregate functions). Apart from that, only the limited number of rows from the subquery is processed.
– Erwin Brandstetter
Jun 17...
MySQL maximum memory usage
...ld utilize ulimit, but you'd likely have to modify the way MySQL starts in order to impose this.
The best solution is to tune your server down, so that a combination of the usual MySQL memory settings will result in generally lower memory usage by your MySQL installation. This will of course hav...
Among $_REQUEST, $_GET and $_POST which one is the fastest?
...$_POST and $_COOKIE.
But it's only a default, which depends on variables_order ; and not sure you want to work with cookies.
If I had to choose, I would probably not use $_REQUEST, and I would choose $_GET or $_POST -- depending on what my application should do (i.e. one or the other, but not bot...
How do I create ColorStateList programmatically?
...N: See Roger Alien's answer (and its first comment) to understand that the order of states here is poor: because "enabled" is first, it will override other states that typically occur while a button is enabled. Better to put "enabled" last. (Or instead of "enabled", an empty/default item last.)
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What are the alternatives now that the Google web search API has been deprecated? [closed]
...ople. Don't be so naive. Google cannot force that ToS down your throat. In order to violate a ToS you must first agree with it (in writing, or by clicking a button like 'Yes, I accept the terms'). Think at this: I put a ToS on my web page that every person that visits that page has to give me $10000...
Do HTML WebSockets maintain an open connection for each client? Does this scale?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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What parameters should I use in a Google Maps URL to go to a lat-lon?
... ll=
Latitude and longitude of the map centre point. Must be in that order.
Requires decimal format. Interestingly, you can use this without q, in
which case it doesn’t show a marker.
sll=
Similar to ll, only this sets the lat/long of the centre point for a business search. Requires t...
Install NPM into home directory with distribution nodejs package (Ubuntu)
... from the environment variable whenever npm runs (note I changed " to ' in order to prevent the shell that executes the echo from expanding the variable, and I added {} around the variable, since that is the syntax used in .npmrc. To make this work, I did have to change .bashrc to read: export NPM_P...