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Capture HTML Canvas as gif/jpg/png/pdf?
...(img);. The document.write code is making the data URL, them making a HTML string, then putting a copy of that string in the DOM, the browser then has to parse that HTML string, put another copy on the image element, then parse it again to turn the data URL into image data, then finally it can show ...
How to write multiple line string using Bash with variables?
...Below mechanism helps in redirecting multiple lines to file. Keep complete string under " so that we can redirect values of the variable.
#!/bin/bash
kernel="2.6.39"
echo "line 1, ${kernel}
line 2," > a.txt
echo 'line 2, ${kernel}
line 2,' > b.txt
Content of a.txt is
line 1, 2.6.39
line 2...
How to produce a range with step n in bash? (generate a sequence of numbers with increments)
...
Pure Bash, without an extra process:
for (( COUNTER=0; COUNTER<=10; COUNTER+=2 )); do
echo $COUNTER
done
share
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improve this answer
...
MySQL CONCAT returns NULL if any field contain NULL
...
convert the NULL values with empty string by wrapping it in COALESCE
SELECT CONCAT(COALESCE(`affiliate_name`,''),'-',COALESCE(`model`,''),'-',COALESCE(`ip`,''),'-',COALESCE(`os_type`,''),'-',COALESCE(`os_version`,'')) AS device_name
FROM devices
...
How to do a GitHub pull request
...merge has also been simplified.
Instead of confirming the delete with an extra step, we immediately remove the branch when you delete it and provide a convenient link to restore the branch in the event you need it again.
That confirms the best practice of deleting the branch after merging a pull...
Difference Between Invoke and DynamicInvoke
...long hand to make it clear that an object[] is involved. There are lots of extra costs here:
the array
validating the passed arguments are a "fit" for the actual MethodInfo
unboxing etc as necessary
reflection-invoke
then the caller needs to do something to process the return value
Basically, av...
How to remove the arrow from a select element in Firefox
...-appearance, text-indent and text-overflow. It is pure CSS and requires no extra markup.
select {
-moz-appearance: none;
text-indent: 0.01px;
text-overflow: '';
}
Tested on Windows 8, Ubuntu and Mac, latest versions of Firefox.
Live example: http://jsfiddle.net/joaocunha/RUEbp/1/
Mo...
How can I remove a key and its value from an associative array?
...:
unset($arr["key2"]);
var_dump($arr);
// output: array(3) { ["key1"]=> string(6) "value1" ["key3"]=> string(6) "value3" ["key4"]=> string(6) "value4" }
To remove element by value:
// remove an element by value:
$arr = array_diff($arr, ["value1"]);
var_dump($arr);
// output: array(2) { ["...
Win32汇编--使用MASM - C/C++ - 清泛网 - 专注C/C++及内核技术
...N input, no echo
08 Keyboard input, no echo
09 Print string
0A Buffered keyboard input
0B Check standard input status
再进入09号功能看使用方法：
Print string (Func 09)
AH = 09h
DS:DX -> string terminated by ...
Linking to an external URL in Javadoc?
...tml#sec14.1">HTTP/1.1 documentation</a>}.
*/
public static final String ACCEPT = "Accept";
/**
* See {@link <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.2">HTTP/1.1 documentation</a>}.
*/
public static final String ACCEPT_CHARSET = "Accept-Charset";
...