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How to convert a number to string and vice versa in C++
...5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *idx = 0);
long double stold(const string& str, size_t *idx = 0);
int stoi(const string& str, size_t *idx = 0, int base = 10);
...
How does Google's Page Speed lossless image compression work?
...lly interested in the technical details, check out the source code:
png_optimizer.cc
jpeg_optimizer.cc
webp_optimizer.cc
For PNG files, they use OptiPNG with some trial-and-error approach
// we use these four combinations because different images seem to benefit from
// different parameters...
How do you run NUnit tests from Jenkins?
... $sourceDirectory = $env:WORKSPACE
, $fileFilters = @("*.UnitTests.dll", "*_UnitTests.dll", "*UnitTests.dll")
, [string]$filterText = "*\bin\Debug*"
)
#script that executes all unit tests available.
$nUnitLog = Join-Path $sourceDirectory "UnitTestResults.txt"
$nUnitErrorLog = Join-Path $sourceDirec...
Is there a built in function for string natural sort?
...use either of the below formulas.
>>> from natsort import natsort_keygen, ns
>>> l1 = ['elm0', 'elm1', 'Elm2', 'elm9', 'elm10', 'Elm11', 'Elm12', 'elm13']
>>> l2 = l1[:]
>>> natsort_key1 = natsort_keygen(key=lambda y: y.lower())
>>> l1.sort(key=natsort_k...
PHP prepend associative array with literal keys?
...epend an associative array with literal key=>value pairs? I know that array_unshift() works with numerical keys, but I'm hoping for something that will work with literal keys.
...
Random record from MongoDB
... enable geospatial indexing on a collection:
db.docs.ensureIndex( { random_point: '2d' } )
To create a bunch of documents with random points on the X-axis:
for ( i = 0; i < 10; ++i ) {
db.docs.insert( { key: i, random_point: [Math.random(), 0] } );
}
Then you can get a random document f...
Why does viewWillAppear not get called when an app comes back from the background?
...egroundNotification, object: nil)
}
override func viewWillAppear(_ animated: Bool) {
print("view will appear")
}
override func viewDidAppear(_ animated: Bool) {
print("view did appear")
}
// MARK: - Notification oberserver methods
@objc func didBecome...
Ruby: How to turn a hash into HTTP parameters?
...reaks down.
require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a => "a", :b => ["c", "d", "e"]}
uri.query
# => "a=a&b[0]=c&b[1]=d&b[2]=e"
uri.query_values = {:a => "a", :b => [{:c => "c", :d => "d"}, {:e => "e", :f => "f"}]}
uri.query
# ...
Print a string as hex bytes?
...ex (convert str to bytes by calling .encode()).
– mic_e
May 8 '15 at 12:53
8
...
What is the difference between Int and Integer?
...answered May 16 '14 at 21:28
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