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Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
...our use of locks and signals to ensure that the queue is kept safe without blocking the other thread for a long time.
– Eric Lippert
Mar 28 '12 at 14:54
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How to find the 'sizeof' (a pointer pointing to an array)?
...here. For example, if you're dynamically allocating the array, allocate a block one int bigger than the one you need, stash the size in the first int, and return ptr+1 as the pointer to the array. When you need the size, decrement the pointer and peek at the stashed value. Just remember to free t...
How to create a private class method?
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Instance methods are defined inside a class definition block. Class methods are defined as singleton methods on the singleton class of a class, also informally known as the "metaclass" or "eigenclass". private is not a keyword, but a method (Module#private).
This is a call to me...
unit testing of private functions with mocha and node.js
...ij yes due to ES6 static exports you cannot use import, export inside of a block. Eventually you will be able to accomplish this sort of thing in ES6 with the System loader. One way to get around it now is to use module.exports = process.env.NODE_ENV === 'production' ? require('prod.js') : require(...
How to check internet access on Android? InetAddress never times out
... on main thread
- does not work on some old devices (Galays S3, etc.), it blocks a while if no internet is available.
B) Connect to a Socket on the Internet (advanced)
// TCP/HTTP/DNS (depending on the port, 53=DNS, 80=HTTP, etc.)
public boolean isOnline() {
try {
int timeoutMs = 1500...
Changing one character in a string
...explicitly to avoid trouble. Everything is machine-oriented. I worked with PHP before learning Python, and that language is a total mess. Regarding your note on fast CPUs I'm totally with you. But a part of that problem is the popular disapproval of premature optimization, which leads to slow interp...
MySQL select 10 random rows from 600K rows fast
...d 2Gb size. See here my code: Fast selection of random rows in MySQL
<?php
$time= microtime_float();
$sql='SELECT COUNT(*) FROM pages';
$rquery= BD_Ejecutar($sql);
list($num_records)=mysql_fetch_row($rquery);
mysql_free_result($rquery);
$sql="SELECT id FROM pages WHERE RAND()*$num_records<2...
How to add \newpage in Rmarkdown in a smart way?
... : object 'opts_knit' not found Calls: <Anonymous> ... process_group.block -> call_block -> eval_lang -> eval -> eval Execution halted opts_knit$get works fine in the console though. ?
– keithpjolley
Sep 29 '18 at 17:34
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Unique (non-repeating) random numbers in O(1)?
...width you want. E.g. for the example in this question: radix 10, width 3.
Block ciphers normally have a fixed block size of e.g. 64 or 128 bits. But Format-Preserving Encryption allows you to take a standard cipher like AES and make a smaller-width cipher, of whatever radix and width you want, with...
How to compare two floating point numbers in Bash?
...thon. You have perl installed by default on many Linux/Unix systems.. even php also
– anubhava
Jul 19 '17 at 15:44
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