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How to update SQLAlchemy row entry?
...SERIALIZABLE transaction isolation-level, but to my understanding it would allow performing the addition in Python using the in-place addition. If there is a race, one of the transactions will then succeed and the others will fail and must retry (with the new state of the DB). But I might've misunde...
Can functions be passed as parameters?
...s string.
func value(x int) string {
return fmt.Sprintf("%v", x)
}
// quote123 passes 123 to convert func and returns quoted string.
func quote123(fn convert) string {
return fmt.Sprintf("%q", fn(123))
}
func main() {
var result string
result = value(123)
fmt.Println(result)
...
Get ffmpeg information in friendly way
...utput (like you mention in one of your comments).
For example, ffprobe -v quiet -print_format json -show_format -show_streams somefile.asf would yield something like the following:
{
"streams": [{
"index": 0,
"codec_name": "wmv3",
"codec_long_name": "Windows Media Video 9",
"code...
How does a public key verify a signature?
... add a digital signature to a document using his/her private key to essentially obtain a hash of the document, but what I do not understand is how the public key can be used to verify that signature.
...
Can I keep Nuget on the jQuery 1.9.x/1.x path (instead of upgrading to 2.x)?
...g syntax in your packages.config:
<package id="jQuery" version="1.9.1" allowedVersions="[1.9.1]" />
There's more information on version constraints here:
http://docs.nuget.org/docs/reference/Versioning
After making the config change, an update should not upgrade your jQuery package to the...
How do I get Windows to go as fast as Linux for compiling C++?
...for Linux. This might result in unnecessary compilations when you make a small change. You might be able to validate this using the same compiler toolchain on Windows.
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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...t seems that many projects slowly come upon a need to do matrix math, and fall into the trap of first building some vector classes and slowly adding in functionality until they get caught building a half-assed custom linear algebra library, and depending on it.
...
Unmangling the result of std::type_info::name
...
Given the attention this question / answer receives, and the valuable feedback from GManNickG, I have cleaned up the code a little bit. Two versions are given: one with C++11 features and another one with only C++98 features.
In file type.hpp
#if...
What is the difference between location list and quickfix list in vim
The following is from the documentation about the quickfix list and location list. But I am not sure what actually different. The image below shows the same things from the location list and quickfix list. When do I use one or another in vimgrep and lvimgrep.
...
Why are floating point numbers inaccurate?
...ted a lot like scientific notation: with an exponent and a mantissa (also called the significand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 5179139571476070. The reason it is impossible to represent some de...