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How to limit the amount of concurrent async I/O operations?
...hecker
{
private const int ThreadCount=20;
private CountdownEvent _countdownEvent;
private SemaphoreSlim _throttler;
public Task Check(IList<string> urls)
{
_countdownEvent = new CountdownEvent(urls.Count);
_throttler = new SemaphoreSlim(ThreadCount);
...
How can I add a class to a DOM element in JavaScript?
...
An explanation would be in order. For example, what do you mean by "a function approach"? Can you elaborate (by editing your answer, not here in comments)? Thanks in advance.
– Peter Mortensen
Jan 29 at 10:07
...
How to insert a value that contains an apostrophe (single quote)?
...need to escape it.
The short answer is to use two single quotes - '' - in order for an SQL database to store the value as '.
Look at using REPLACE to sanitize incoming values:
Oracle REPLACE
SQL Server REPLACE
MySQL REPLACE
PostgreSQL REPLACE
You want to check for '''', and replace them if the...
Cast Object to Generic Type for returning
...> T convertInstanceOfObject(java.lang.Object);
Code:
0: aload_0
1: areturn
2: astore_1
3: aconst_null
4: areturn
Exception table:
from to target type
0 1 2 Class java/lang/ClassCastException
public static void main(java...
Python: Get relative path from comparing two absolute paths
.... if one of the paths is a common ancestor:
paths = […, …, …]
common_prefix = os.path.commonprefix(list_of_paths)
if common_prefix in paths:
…
You can then find the relative paths:
relative_paths = [os.path.relpath(path, common_prefix) for path in paths]
You can even handle more th...
Why use strict and warnings?
...ch as @ARGV, %ENV, and all the global punctuation variables such as $. or $_.
Declared with our (for a global) or my (for a lexical).
Imported from another package. (The use vars pragma fakes up an import, but use our instead.)
Fully qualified using its package name and the double-colon package sepa...
Wrap a delegate in an IEqualityComparer
...t;T> : IEqualityComparer<T>
{
readonly Func<T, T, bool> _comparer;
readonly Func<T, int> _hash;
public FuncEqualityComparer( Func<T, T, bool> comparer )
: this( comparer, t => 0 ) // NB Cannot assume anything about how e.g., t.GetHashCode() interact...
Comparison of JSON Parser for Objective-C (JSON Framework, YAJL, TouchJSON, etc)
... (usually) much faster than the already mentioned JSON libraries, often an order of magnitude faster. And because of it's "recently instantiated object cache", it will (again, usually) use less memory as well.
share
...
Ignore .pyc files in git repository
... as a shell glob suitable for
consumption by fnmatch(3) with the FNM_PATHNAME flag: wildcards in
the pattern will not match a / in the pathname. For example,
"Documentation/*.html" matches "Documentation/git.html" but not
"Documentation/ppc/ppc.html" or
"tools/perf...
How to avoid reinstalling packages when building Docker image for Python projects?
...f the other files after running pip. Thus, they should be in the following order: (1) ADD requirements.txt /srv; (2) RUN pip install -r requirements.txt; (3) ADD . /srv
– engelen
Sep 1 '17 at 14:49
...