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Execute a command line binary with Node.js
...s well documented in the documentation (v5.0.0). To execute a command and fetch its complete output as a buffer, use child_process.exec:
var exec = require('child_process').exec;
var cmd = 'prince -v builds/pdf/book.html -o builds/pdf/book.pdf';
exec(cmd, function(error, stdout, stderr) {
// com...
How do I wait for an asynchronously dispatched block to finish?
...ate (eg callbacks/delegate protocols, being available, going away, errors, etc.). (These can be refactored into blocks if you don't like callback hell.) Because this is how to expose real behavior to the rest of the app than hide it behind a false façade.
Instead, use NSNotificationCenter, defin...
How long do browsers cache HTTP 301s?
...is directed back to a same URL a second time during a redirect, it should fetch it from the origin again instead of redirecting again from cache, in an attempt to avoid a redirect loop. Comments on this answer indicate this now works in all major browsers - but there may be some minor browsers wher...
Format Instant to String
...LLIS).toString().replaceAll("[TZ]", " ")
output: 2020-02-06 18:01:55.664
etc.
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Throttling method calls to M requests in N seconds
...kens that expire in 10 milliseconds, 10 tokens that expire in millisecond, etc. This actually forces the instantaneous rate to be closer to the average rate, smoothing spikes, which may cause backups at the client, but that’s a natural consequence of rate limiting. 1 million RPM hardly sounds like...
In Python, when to use a Dictionary, List or Set?
...g from zero - the first one is numbered zero, the
second 1, the third 2, etc. You can remove values from the list, and
add new values to the end. Example: Your many cats' names.
Dictionaries are similar to what their name suggests - a dictionary.
In a dictionary, you have an 'index' of wo...
How can I convert JSON to a HashMap using Gson?
...ng,Object>();
map = (Map<String,Object>) gson.fromJson(json, map.getClass());
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Rails 4: before_filter vs. before_action
...ller::Base, before_action is just a new syntax for before_filter.
However all before_filters syntax are deprecated in Rails 5.0 and will be removed in Rails 5.1
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Why CancellationToken is separate from CancellationTokenSource?
... many scenarios (such as deep library stacks, parallel computation, async, etc) and thus was designed with many complex use cases in mind. It is a design intended to encourage successful patterns and discourage anti-patterns without sacrificing performance.
If the door was left open for misbehav...
How can I wait In Node.js (JavaScript)? l need to pause for a period of time
...eople say "horrible" .... This is great e.g. for simulating heavy CPU load etc. Btw very similar to this phpied.com/sleep-in-javascript
– Don Cheadle
Feb 6 '17 at 17:24
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