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Generating a random password in php
...t a cryptographically secure pseudorandom number generator. Look elsewhere for generating a cryptographically secure pseudorandom string in PHP.
Try this (use strlen instead of count, because count on a string is always 1):
function randomPassword() {
$alphabet = 'abcdefghijklmnopqrstuvwxyzAB...
What is `related_name` used for in Django?
What is the related_name argument useful for on ManyToManyField and ForeignKey fields? For example, given the following code, what is the effect of related_name='maps' ?
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When to use symbols instead of strings in Ruby?
... rule of thumb is to use symbols every time you need internal identifiers. For Ruby < 2.2 only use symbols when they aren't generated dynamically, to avoid memory leaks.
Full answer
The only reason not to use them for identifiers that are generated dynamically is because of memory concerns.
Th...
Fastest Way to Find Distance Between Two Lat/Long Points
... a million locations in a mysql database all with longitude and latitude information.
15 Answers
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How should I handle “No internet connection” with Retrofit on Android
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What I ended up doing is creating a custom Retrofit client that checks for connectivity before executing a request and throws an exception.
public class ConnectivityAwareUrlClient implements Client {
Logger log = LoggerFactory.getLogger(ConnectivityAwareUrlClient.class);
public Connec...
Deep copy of a dict in python
I would like to make a deep copy of a dict in python. Unfortunately the .deepcopy() method doesn't exist for the dict . How do I do that?
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Is it bad practice to have a constructor function return a Promise?
I'm trying to create a constructor for a blogging platform and it has many async operations going on inside. These range from grabbing the posts from directories, parsing them, sending them through template engines, etc.
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Using the rJava package on Win7 64 bit with R
...or JAVA_HOME. However note that:
To use rJava in 32-bit R, you need Java for Windows x86
To use rJava in 64-bit R, you need Java for Windows x64
To build or check R packages with multi-arch (the default) you need to install both Java For Windows x64 as well as Java for Windows x86. On Win 64, the...
What characters are allowed in an email address?
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See RFC 5322: Internet Message Format and, to a lesser extent, RFC 5321: Simple Mail Transfer Protocol.
RFC 822 also covers email addresses, but it deals mostly with its structure:
addr-spec = local-part "@" domain ; global address
local...
How to rename a file using Python
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not really, on 3.7 ubuntu, works for me using relative paths
– toing_toing
Feb 28 '19 at 15:51
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