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Why does C++ compilation take so long?
...e in your program.
In C++, vector<int> is a completely separate type from vector<float>, and each one will have to be compiled separately.
Add to this that templates make up a full Turing-complete "sub-language" that the compiler has to interpret,
and this can become ridiculously compli...
Why is using the JavaScript eval function a bad idea?
... @EduardoMolteni, we don't care (and indeed cannot prevent) users from executing js in their own browsers. The attacks we are trying to avoid are when user provided values get saved, then later placed into javascript and eval'd. For example, I might set my username to: badHackerGuy'); doMal...
Best practices when running Node.js with port 80 (Ubuntu / Linode) [closed]
....
This allows port 80/443 to remain protected, while still preventing you from serving requests as root:
function drop_root() {
process.setgid('nobody');
process.setuid('nobody');
}
A full working example using the above function:
var process = require('process');
var http = require('ht...
How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?
I would like to write a single SQL command to drop multiple columns from a single table in one ALTER TABLE statement.
11 ...
Determine if a function exists in bash
Currently I'm doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
...
Two way/reverse map [duplicate]
...namely the python package bidict. It's extremely straight forward to use:
from bidict import bidict
map = bidict(Bob = "Alice")
print(map["Bob"])
print(map.inv["Alice"])
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String replacement in java, similar to a velocity template
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Use StringSubstitutor from Apache Commons Text.
https://commons.apache.org/proper/commons-text/
It will do it for you (and its open source...)
Map<String, String> valuesMap = new HashMap<String, String>();
valuesMap.put("animal", ...
Why is the shovel operator (
...
First way you do it by taking a new glass, filling it halfway with water from a tap and then using this second half-full glass to refill your drinking glass. You do this every time you need to refill your glass.
The second way you take your half full glass and just refill it with water straight f...
Is ASCII code 7-bit or 8-bit?
...SCII-compatible means that regardless of context, single bytes with values from 0x00 through 0x7F encode the same characters that they would in ASCII. You don't want to have anything to do with a non-ASCII-compatible text encoding if you can possibly avoid it; naive programs expecting ASCII tend to...
Why is a combiner needed for reduce method that converts type in java 8
...l streams, or put another way, a particular API shouldn't prevent a stream from running correctly either sequentially or in parallel. If your lambdas have the right properties (associative, non-interfering, etc.) a stream run sequentially or in parallel should give the same results.
Let's first con...