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jQuery vs document.querySelectorAll
... // or
element.style["background-color"] = "green"
This code would be at least two times as much lines of code you write with jQuery. Also you would have to consider cross-browser issues which will compromise the severe speed advantage (besides from the reliability) of the native code.
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Is there any difference between GROUP BY and DISTINCT
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At least in Oracle 12 there do appear to be cases where DISTINCT, getting distinct values by UNION, and GROUP BY work differently. I just had a case earlier today where DISTINCT and distinct by UNION cause an oracle error, but G...
Can I set enum start value in Java?
... lazy of the Java standards not to allow a value to be set for an enum. At least c# allows this AND is type-safe.
– csmith
Mar 20 '16 at 15:30
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How to determine if a number is odd in JavaScript
...ey Every number is comprised of a series of bits. All odd numbers have the least-significant (rightmost) bit set to 1, all even numbers 0. The x & 1 checks if the last bit is set in the number (because 1 Is a number with all bits set to 1 except for the least significant bit): If it is, the numb...
How to design a product table for many kinds of product where each product has many parameters
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You have at least these five options for modeling the type hierarchy you describe:
Single Table Inheritance: one table for all Product types, with enough columns to store all attributes of all types. This means a lot of columns, most ...
Regular expression for letters, numbers and - _
...omplicated.
The above regex also matches the empty string. If you need at least one character, then use + (one-or-more) instead of * (zero-or-more) for repetition.
In any case, you can further clarify your specification (always helps when asking regex question), but hopefully you can also learn ho...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...e task has now came down to calculate a0 and a1 in order for y to have the least difference from the exact value. They have calculated that the most appropriate values are:
a0 = 0x5f375a86
a1 = -0.5
So when you put this into equation you get:
y = 0x5f375a86 - 0.5*x
Which is the same as the lin...
Showing empty view when ListView is empty
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After at least an hour of trying various things, and having nothing work (showing the "empty" text in addition to data in the listview), this worked for me when using a ListView in an Activity instead of extending ListActivity. Thank...
What are the key differences between Apache Thrift, Google Protocol Buffers, MessagePack, ASN.1 and
...ures, the Encoding Rules define the on the wire encoding, and last but not least the Compiler transfers it to your programming language.
The free Compilers support C,C++,C#,Java, and Erlang to my knowledge. The (much to expensive and patent/licenses ridden) commercial compilers are very versatile, ...
In an array of objects, fastest way to find the index of an object whose attributes match a search
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This answer is at least 3.5 times faster than the accepted answer above. Using var elementPos = array.map(function(x) {return x.id; }).indexOf(idYourAreLookingFor); it took 0.03500000002532033 milliseconds Using [{id:1},{id:2},{id:3},{id:4...