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Cron jobs and random times, within given hours
I need the ability to run a PHP script 20 times a day at completely random times. I also want it to run only between 9am - 11pm.
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random.seed(): What does it do?
I am a bit confused on what random.seed() does in Python. For example, why does the below trials do what they do (consistently)?
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How to draw border on just one side of a linear layout?
...ne side
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="#FF0000" />
</shape>
</item>
<item android:left="5dp"&gt...
Why should I use 'li' instead of 'div'?
...or semantic correctness. HTML has the ability to express lists of things, and it helps the Google robot, screen readers, and all manner of users who don't care solely about the presentation of the site understand your content better.
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How do you determine the ideal buffer size when using FileInputStream?
I have a method that creates a MessageDigest (a hash) from a file, and I need to do this to a lot of files (>= 100,000). How big should I make the buffer used to read from the files to maximize performance?
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WAMP error: Forbidden You don't have permission to access /phpmyadmin/ on this server
I am new to WAMP and I have just installed it today.
33 Answers
33
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Can I write a CSS selector selecting elements NOT having a certain class or attribute?
...ibute]) {
/* Styles */
}
But if you need better browser support (IE8 and older don't support :not()), you're probably better off creating style rules for elements that do have the "printable" class. If even that isn't feasible despite what you say about your actual markup, you may have to work...
In Perl, how can I read an entire file into a string?
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Add:
local $/;
before reading from the file handle. See How can I read in an entire file all at once?, or
$ perldoc -q "entire file"
See Variables related to filehandles in perldoc perlvar and perldoc -f local.
Incidentally, if you can put your script on the server,...
What is “assert” in JavaScript?
...ssertions (as they're called) are used only in "testing" or "debug" builds and stripped out of production code.
Suppose you had a function that was supposed to always accept a string. You'd want to know if someone called that function with something that wasn't a string. So you might do:
assert(ty...
Is there an opposite to display:none?
...whether an element is visible or not. It therefore has two states (visible and hidden), which are opposite to each other.
The display property, however, decides what layout rules an element will follow. There are several different kinds of rules for how elements will lay themselves out in CSS, so t...