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How do you Encrypt and Decrypt a PHP String?
...strlen() and mb_substr(), using the '8bit' character set mode to prevent mbstring.func_overload issues.
IVs should be generating using a CSPRNG; If you're using mcrypt_create_iv(), DO NOT USE MCRYPT_RAND!
Also check out random_compat.
Unless you're using an AEAD construct, ALWAYS encrypt then MAC...
Convert an image to grayscale in HTML/CSS
...: grayscale(100%);
filter: gray; /* IE6+ */
Take care to replace "utf-8" string by your file encoding.
This method should be faster than the other because the browser will not need to do a second HTTP request.
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Understanding the map function
...an example of what you asked for in the comments on the question - "turn a string into an array", by 'array' you probably want either a tuple or a list (both of them behave a little like arrays from other languages) -
>>> a = "hello, world"
>>> list(a)
['h', 'e', 'l', 'l', 'o', ...
Storing Python dictionaries
..., the foundational unit in json is the "Object", which is defined as { <string> : <value>}. Look familiar? The json module in the standard library supports every Python native type and can easily be extended with a minimal knowledge of json to support user-defined classes. The JSON homep...
Python import csv to list
... This does not work in Python 3.x : "csv.Error: iterator should return strings, not bytes (did you open the file in text mode?)" See below for the answer that works in Python 3.x
– Gilbert
May 30 '16 at 18:12
...
AsyncTask threads never die
...t will have from 5 to 128 threads. If there are more than 5 threads, those extra threads will stick around for at most 10 seconds before being removed. (note: these figures are for the presently-visible open source code and vary by Android release).
Leave the AsyncTask threads alone, please.
...
Comment Inheritance for C# (actually any language)
...class or namespace!
public class Foo
{
/// <inheritdoc cref="System.String.IndexOf" />
public void Bar() { ... } // this method will now have the documentation of System.String.IndexOf
}
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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
...ion) :
base(null, innerException)
{
}
public override string Message
{
get
{
var innerException = InnerException as DbEntityValidationException;
if (innerException != null)
{
StringBuilder sb = new StringBui...
Difference between ActionBarSherlock and ActionBar Compatibility
...rderInCategory="100"
android:showAsAction="always"
android:title="@string/action1"/>
<item
android:id="@+id/action_2"
android:orderInCategory="100"
android:showAsAction="ifRoom"
android:title="@string/action2"/>
<item
android:id="@+id/action_3"
android:o...
Can I make fast forwarding be off by default in git?
...
From the documentation:
merge.ff
By default, git does not create an extra merge commit when merging a commit that is a descendant of the current commit. Instead, the tip of the current branch is fast-forwarded. When set to false, this variable tells git to create an extra merge commit in such...