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Is there a performance difference between a for loop and a for-each loop?
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From Item 46 in Effective Java by Joshua Bloch :
The for-each loop, introduced in
release 1.5, gets rid of the clutter
and the opportunity for error by
hiding the iterator or index variable
completely. The resulting id...
Using OR in SQLAlchemy
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@intgr My experience with Oracle shows that a sequence of "OR"s is way faster than using "IN". Also "IN" is limited to a set of ~1000 entries, while "OR" is not.
– g.a
Sep 5 '18 at 21:13
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What is the use of “assert” in Python?
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The assert statement exists in almost every programming language. It helps detect problems early in your program, where the cause is clear, rather than later as a side-effect of some other operation.
When you do...
assert condition
... you're telling the program to test that condition, ...
Is inject the same thing as reduce in ruby?
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Yes, and it's also called fold in many other programming languages and in Mathematics. Ruby aliases a lot in order to be intuitive to programmers with different backgrounds. If you want to use #length on an Array, you can. If you want...
How to open a URL in a new Tab using JavaScript or jQuery? [duplicate]
...ttp://stackoverflow.com/', '_blank');
if (win) {
//Browser has allowed it to be opened
win.focus();
} else {
//Browser has blocked it
alert('Please allow popups for this website');
}
Depending on the browsers implementation this will work
There is nothing you can do to make it ope...
What is Autoloading; How do you use spl_autoload, __autoload and spl_autoload_register?
... spl_autoload_register(), which allows you to pick up the variable and use it to "include" the appropriate class/file. As a result you don't specifically need to include that class via an include/require statement...
Just simply call the class you want to instantiate like in the example above, and...
How do I get an object's unqualified (short) class name?
How do I check the class of an object within the PHP name spaced environment without specifying the full namespaced class.
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Get hours difference between two dates in Moment Js
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Shouldn't it be startTime.diff(end, 'hours', true);? The duration.asHours(); would return 1 if it was 25 hours ago.
– Daniel F
Nov 5 '15 at 23:04
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Xcode 5.1 - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=i
After updating to Xcode 5.1, I can no longer build my project for the 64-bit simulator, receiving this error:
18 Answers
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Dynamically load JS inside JS [duplicate]
...ic web page where I need to import an external JS file (under an IF condition) inside another javascript file.
13 Answer...