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How to reuse an ostringstream?
...ence to the begin:
s.clear();
s.seekp(0); // for outputs: seek put ptr to start
s.seekg(0); // for inputs: seek get ptr to start
That will prevent some reallocations done by str by overwriting whatever is in the output buffer currently instead. Results are like this:
std::ostringstream s;
s <...
Has anyone ever got a remote JMX JConsole to work?
...If your Java process is running on Linux behind a firewall and you want to start JConsole / Java VisualVM / Java Mission Control on Windows on your local machine to connect it to the JMX Port of your Java process.
You need access to your linux machine via SSH login. All Communication will be tunnel...
“Default Activity Not Found” on Android Studio upgrade
...you may need to refresh the IDE's cache.
File -> Invalidate Caches / Restart...
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How is Node.js inherently faster when it still relies on Threads internally?
...
There are actually a few different things being conflated here. But it starts with the meme that threads are just really hard. So if they're hard, you are more likely, when using threads to 1) break due to bugs and 2) not use them as efficiently as possible. (2) is the one you're asking about....
Is there a Python equivalent to Ruby's string interpolation?
... add literal string interpolation similar to Ruby's string interpolation. Starting with that version of Python (which is scheduled to be released by the end of 2016), you will be able to include expressions in "f-strings", e.g.
name = "Spongebob Squarepants"
print(f"Who lives in a Pineapple under ...
How to access the request body when POSTing using Node.js and Express?
...
Starting from express v4.16 there is no need to require any additional modules, just use the built-in JSON middleware:
app.use(express.json())
Like this:
const express = require('express')
app.use(express.json()) // &...
How do you display a Toast from a background thread on Android?
...d.
Below example handles that scenario.
You have UI Thread
You have to start IO operation and hence you can't run Runnable on UI thread. So post your Runnable to handler on HandlerThread
Get the result from Runnable and send it back to UI thread and show a Toast message.
Solution:
Create a H...
In Clojure how can I convert a String to a number?
... it to allow negative numbers. I also made it so it requires the number to start at the beginning of the string.
(defn parse-int [s]
(Integer/parseInt (re-find #"\A-?\d+" s)))
Additionally I found that Integer/parseInt parses as decimal when no radix is given, even if there are leading zeroes.
Ol...
Why use Ruby instead of Smalltalk? [closed]
...circles. In the meantime Java EE has had a complete acceptance lifecycle starting with raving fanboys promoting it and finally getting bored and moving onto Ruby ;-}Ironically, Seaside is starting to get a bit of mindshare among the cognoscenti so we may find that Smalltalk rides that cycle back i...
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...IP address in JDBC URL instead.
Verify it based on my.cnf of MySQL DB.
Start the DB.
Verify if mysqld is started without the --skip-networking option.
Restart the DB and fix your code accordingly that it closes connections in finally.
Disable firewall and/or configure firewall/proxy to all...