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node.js database [closed]
... think going with a newer stack like node.js (vs traditional frameworks in php/java) is adding enough "new" complexity that one shouldn't add extra layers all at once. This is a good article that discusses that:
http://nodeguide.com/convincing_the_boss.html
...
How are virtual functions and vtable implemented?
...(which it usually isn't) (ISO/IEC 14882:2003 10.4-2). In practice it does allocate a slot in the vtable for the function but does not assign an address to it. This leaves the vtable incomplete which requires the derived classes to implement the function and complete the vtable. Some implementations...
How can I convert an image into Base64 string using JavaScript?
...on firefox 35 on some images, the base64 is different from the base64 that php creates on the same image.
– hanshenrik
Mar 6 '15 at 2:39
1
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How to check if hex color is “too black”?
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I found this WooCommerce Wordpress PHP function (wc_hex_is_light) and I converted to JavaScript. Works fine!
function wc_hex_is_light(color) {
const hex = color.replace('#', '');
const c_r = parseInt(hex.substr(0, 2), 16);
const c_g = parseInt(hex...
Concurrent vs serial queues in GCD
...chronously in a background thread without freezing UI(e.g.refreshing OAuth Token and wait if it succeed or not).You need to wrap that method inside a asynchronous operation.This way your heavy operations are executed in the order and without Blocking main thread.
func doMultipleSyncTaskWithinAsynch...
Check if a program exists from a Makefile
...some of the existing solutions here...
REQUIRED_BINS := composer npm node php npm-shrinkwrap
$(foreach bin,$(REQUIRED_BINS),\
$(if $(shell command -v $(bin) 2> /dev/null),$(info Found `$(bin)`),$(error Please install `$(bin)`)))
The $(info ...) you can exclude if you want this to be quiete...
How to detect when an Android app goes to the background and come back to the foreground
...rocess had been showing a user interface, and is no longer doing so. Large allocations with the UI should be released at this point to allow memory to be better managed.
Of course, you should implement this to actually do what it says (purge memory that hasn't been used in certain time, clear some...
Which Java Collection should I use?
...ndex, you access them by their key, which is any object. Like the array in PHP :)
Data in Map are searchable by their key.
Typical operation: get an element by its ID (where ID is of any type, not only int as in case of List).
The differences
Set vs. Map: in Set you search data by themselves, whi...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
...though threads are relatively easy to create and use, the operating system allocates a significant amount of time and other resources to manage them."
CreateThread documentation on MSDN says "However, your application will have better performance if you create one thread per processor and build queu...
What are the differences between the threading and multiprocessing modules?
...faster to create and manage than processes (because the OS doesn't need to allocate a whole new virtual memory area), and inter-thread communication is usually faster than inter-process communication. But threads are harder to program. Threads can interfere with one another, and can write to each ot...