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Illegal mix of collations MySQL Error
...found working is to do the string compare by converting the strings into a hexadecimal representation of it's characters. On the database this is done with HEX(column). For PHP you may use this function:
public static function strToHex($string)
{
$hex = '';
for ($i=0; $i<strlen($string);...
Set transparent background of an imageview on Android
...rkDasarp Not only from 01 to 99, as the rest of the numbers these are also hexadecimal so you can put anything from 00 to ff. For fifty percent transparent you should put 80 instead of 50, and for the others you have some basic calculations to do...
– Nemanja Kovacevic
...
How to Set Opacity (Alpha) for View in Android
... of a view, the format can be either #RRGGBB or #AARRGGBB, where AA is the hex alpha value. FF would be fully opaque and 00 would be full transparent.
Dynamically
If you need to dynamically alter the opacity in your code, use
myButton.getBackground().setAlpha(128); // 50% transparent
Where the...
Storing SHA1 hash values in MySQL
...= 20 character long field.
So I recommend you to use BINARY(20) and the UNHEX function to convert the SHA1 value to binary.
I compared storage requirements for BINARY(20) and CHAR(40).
CREATE TABLE `binary` (
`id` int unsigned auto_increment primary key,
`password` binary(20) not null
);
...
Selecting and manipulating CSS pseudo-elements such as ::before and ::after using jQuery
... I'm trying to dynamically set glyphicon values (i.e., via their hex values) in ::after psedo. content: element (e.g., content: "\e043";). it doesn't seem to work for me so I'm assuming it doesn't work for hex values for glyphicons either?
– user2101068
...
What is the correct JSON content type?
...
@XP84 You can open any binary with a text editor in HEX form. And all the different characters (the 16 of them) are 100% printable. So, by that logic... are all binaries text? Json is not text. Json is (warning: informal loose definition ahead) a text representation of an obje...
Maximum length for MD5 input/output
...fixed-length output of 128 bits, typically represented as a sequence of 32 hexadecimal digits.
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APP inventer 2 出现Runtime Error：No virtual method isDeniedPermission...
ble蓝牙App编译成apk后运行报错：
问题原因：
用的广州服务器，版本太老（约5年前的版本）导致的，不但apk运行会报错，AI伴侣大概率也会。建议使用中文网（https://www.fun123.cn）平台，和MIT同步更新的。
参考：https://com...
APP INVENTOR硬件交互学习教程02——资源介绍 - 创客硬件开发 - 清泛IT社区...
...外发射和接收，方便进行红外解码，红外发射实验
6.蓝牙模块插座，方便扩展配置
7.一路继电器，可以进行大功率设备控制实验
8.一路蜂鸣器，可以进行一些报警实验。
9.其他扩展外设模块，WS2812，舵机，RF模块...
【客户反馈】增加直接改项目名称的功能 - 用户反馈 - 清泛IT社区，为创新赋能！
...有些思路在名字上有体现会比较好。比如我一开始只做了蓝牙模块控制，名字ble，后面又加wifi，项目名称改的话就是wifi+ble。
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感谢反馈，采纳此条建议，改名功能推进中，敬请期待！已支持并上线：https://b...