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Float vs Decimal in ActiveRecord
...r that is how the IEEE specification defines floats in binary format. Basically, it stores sign, fraction and exponent to represent a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
Th...
regex.test V.S. string.match to know if a string matches a regular expression
...sion
Use .test if you want a faster boolean check. Use .match to retrieve all matches when using the g global flag.
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Using multiple let-as within a if-statement in Swift
...e code inside the if-let block won't be executed.
Note: the clauses don't all have to be 'let' clauses, you can have any series of boolean checks separated by commas.
For example:
if let latitudeDouble = latitude as? Double, importantThing == true {
// latitudeDouble is non-optional in here ...
Positioning a div near bottom side of another div
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IE7 was horizontally positioning the green div after the word "Outer". I've updated the code to specify "left: 0".
– RichieHindle
May 13 '09 at 14:05
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Count occurrences of a char in plain text file
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If all you need to do is count the number of lines containing your character, this will work:
grep -c 'f' myfile
However, it counts multiple occurrences of 'f' on the same line as a single match.
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Perform Segue programmatically and pass parameters to the destination view
in my app I've a button that performs a segue programmatically:
5 Answers
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How do I execute a stored procedure once for each row returned by query?
...1, @field2
fetch next from cur into @field1, @field2
END
close cur
deallocate cur
in MS SQL, here's an example article
note that cursors are slower than set-based operations, but faster than manual while-loops; more details in this SO question
ADDENDUM 2: if you will be processing more tha...
Filter element based on .data() key/value
...ts with class .navlink , which, when clicked, use .data() to set a key called 'selected' , to a value of true :
5 Answ...
Chrome developer tools: View Console and Sources views in separate views/vertically tiled?
...ew window. Then press Esc to open the console.
Both the window and the "small console" can be resized to meet your needs.
Horizontal split
If you prefer to have the console at the right instead of the bottom, customize the developer tools by editing path/to/profile/Default/User StyleSheets/Cust...
Why use softmax as opposed to standard normalization?
...harper image? This is simply a matter of scaling and both cases are essentially the same. If anything, this should seem to support standard normalization, which correctly considers the two cases equivalent.
– user118967
Jun 5 '19 at 5:07
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