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App Inventor 2 构建纯血鸿蒙 HarmonyOS App · App Inventor 2 中文网
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Two-way encryption: I need to store passwords that can be retrieved
...json).
After you have successfully encrypted using mcrypt, run it through base64_encode and then convert it to hex code. Once in hex code it's easy to transfer in a variety of ways.
$td = mcrypt_module_open('tripledes', '', 'ecb', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RA...
Using HTML and Local Images Within UIWebView
...IWebView. Instead you have to load the HTML into the view with the correct baseURL:
NSString *path = [[NSBundle mainBundle] bundlePath];
NSURL *baseURL = [NSURL fileURLWithPath:path];
[webView loadHTMLString:htmlString baseURL:baseURL];
You can then refer to your images like this:
<img src="m...
How long should SQL email fields be? [duplicate]
...
Some statistical data may shed some light on the issue. We analyzed a database with over 10 million Email addresses. These addresses are not confirmed so there are invalid ones. Here are some interesting facts,
The longest valid one is 89.
There are hundreds longer ones up to the limit of our col...
HMAC-SHA1 in bash
... in this example, what is the encoding / format of the key? Should it be a base64 encoding like a private key created using openssl genrsa? Also, the openssl documentation link results in a 404.
– Carlos Macasaet
Aug 18 '15 at 5:07
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ng-model for `` (with directive DEMO)
... populate your model with the contents of your file encoded ad a data-uri (base64).
Check out a working demo here:
http://plnkr.co/CMiHKv2BEidM9SShm9Vv
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How do I print a double value with full precision using cout?
...he accuracy (I forget the exact terminology) of a floating point number in base 10.
See: http://www.cplusplus.com/reference/std/limits/numeric_limits.html
For details about other attributes.
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How can I install pip on Windows?
...llation (C:\Python27\Scripts) or add that directory, as well as the Python base installation directory to your %PATH% environment variable.
Install pip using the newly installed setuptools: easy_install pip
The last step will not work unless you're either in the directory easy_install.exe is locat...
How to update Python?
... 3.3, 3.4 and 3.5. The root Anaconda/Miniconda installations are currently based on either Python-2.7 or Python-3.5.
Anaconda will likely disrupt any other Python installations. Installation uses MSI installer.
[UPDATE: 2016-05-16] Anaconda and Miniconda now use .exe installers and provide options ...
Usage of __slots__?
...lare a particular slot one time in an inheritance tree. For example:
class Base:
__slots__ = 'foo', 'bar'
class Right(Base):
__slots__ = 'baz',
class Wrong(Base):
__slots__ = 'foo', 'bar', 'baz' # redundant foo and bar
Python doesn't object when you get this wrong (it probably...