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Get Base64 encode file-data from Input Form
...ipt.
The easy way:
The readAsDataURL() method might already encode it as base64 for you. You'll probably need to strip out the beginning stuff (up to the first ,), but that's no biggie. This would take all the fun out though.
The hard way:
If you want to try it the hard way (or it doesn't work),...
What does the * * CSS selector do?
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...a list of many others) is that it tends to artificially favor lookup table based solutions. Since the benchmark is repeating the one operation in a loop, it will often find that using a lookup table that just fits in L1 is the fastest, because everything will hit in L1 every time since there is no c...
PostgreSQL create table if not exists
... */ sch.foo (
id serial NOT NULL,
demo_column varchar NOT NULL,
demo_column2 varchar NOT NULL,
CONSTRAINT pk_sch_foo PRIMARY KEY (id));
CREATE INDEX /* IF NOT EXISTS add for PostgreSQL 9.5+ */ idx_sc...
Make footer stick to bottom of page correctly [duplicate]
... <html> tag and position the <footer> with position:absolute;
Demo: jsfiddle and SO snippet:
html {
position: relative;
min-height: 100%;
}
body {
margin: 0 0 100px;
/* bottom = footer height */
padding: 25px;
}
footer {
background-color: orang...
Case insensitive searching in Oracle
... force a full table scan. In order to avoid this you can create a function-based index.
create index my_index on my_table ( lower(column_1) );
If you're using LIKE then you have to concatenate a % around the string you're searching for.
select * from my_table where lower(column_1) LIKE lower('my...
How do I achieve the theoretical maximum of 4 FLOPs per cycle?
...sh:~ mackie$ clang -v
Apple clang version 3.0 (tags/Apple/clang-211.10.1) (based on LLVM 3.0svn)
Target: x86_64-apple-darwin11.2.0
Thread model: posix
The inner loop of clang's code looks like this:
.align 4, 0x90
LBB2_4: ## =>This Inner Loop Header: De...
Any free WPF themes? [closed]
...o provides Windows 8 Look and feel with a few variants like dark and light base themes with green,blue etc for text and others. Its pretty cool and can be used out of the box.
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How do I decode HTML entities in Swift?
...("20ac", 16) --> "€"
func decodeNumeric(_ string : Substring, base : Int) -> Character? {
guard let code = UInt32(string, radix: base),
let uniScalar = UnicodeScalar(code) else { return nil }
return Character(uniScalar)
}
// De...
怎么通过app inventor接收mqtt平台推送的长消息 - App Inventor 2 中文网 -...
我使用的MQTT平台是mind+的siot平台，发布的消息是图片的BASE64编码
你好，mqtt接收长消息目前是有什么问题吗？请提供详细的问题截图或报错信息。
接收的base64编码的图片，可以是使用拓展解码还原成图片：https://www.fun123.cn/ref...