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MySQL indexes - what are the best practices?
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You should definitely spend some time reading up on indexing, there's a lot written about it, and it's important to understand what's going on.
Broadly speaking, an index imposes an ordering on the rows of a table.
For simplicity's sake, imagine a table is ju...
upstream sent too big header while reading response header from upstream
...the proxy_buffer_size and the proxy_buffers, or disable it totally (Please read the nginx documentation).
Example of proxy buffering configuration
http {
proxy_buffer_size 128k;
proxy_buffers 4 256k;
proxy_busy_buffers_size 256k;
}
Example of disabling your proxy buffer (recommended ...
How do I check if a number evaluates to infinity?
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@Eli: The global Infinity property isn't read-only which means that it can be redefined: For example, var x = 42; Infinity = 42; alert(x === Infinity); displays "true". (Admittedly that's an obscure case, and anyone who decides to redefine Infinity, NaN etc should e...
Generator Expressions vs. List Comprehension
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@Annan Only if you already have access to another infinite generator. For example, itertools.count(n) is an infinite sequence of integers, starting from n, so (2 ** item for item in itertools.count(n)) would be an infinite sequence of the powers ...
What is “android:allowBackup”?
...cation data off of the device. Once backed up, all application data can be read by the user. adb restore allows creation of application data from a source specified by the user. Following a restore, applications should not assume that the data, file permissions, and directory permissions were create...
OpenSSL and error in reading openssl.conf file
...ine but I was using that command in the openssl.exe instead of cmd.exe.. I read your comment and went to cmd.exe and typed the set command there instead. It worked correctly but I was still getting the same error in the openssl.exe saying "Unable to load config info from wrong_path/ssl/openssl.cnf" ...
How to read the value of a private field from a different class in Java?
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Try FieldUtils from apache commons-lang3:
FieldUtils.readField(object, fieldName, true);
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Volatile vs Static in Java
...value for all objects and volatile means one copy of the value for all threads?
8 Answers
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Provide an image for WhatsApp link sharing
...tter, Facebook and bookmark icons for pc's and mobile devices. If you like reading go to ogp.me - but make sure to read steps 1 - 6 in this answer to get the best WhatsApp preview.
Please note: some apps or websites use cache or even store the website preview to their database. This means when you'r...
onchange event on input type=range is not triggering in firefox while dragging
...his.value)" onchange="showVal(this.value)">
Check out this Bugzilla thread for more information.
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