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Cannot import XSSF in Apache POI
...ependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.11</version>
</dependency>
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How to clear a chart from a canvas so that hover events cannot be triggered?
...nd then reappending a new <canvas> to the parent container
My specific code (obviously there's a million ways to do this):
var resetCanvas = function(){
$('#results-graph').remove(); // this is my <canvas> element
$('#graph-container').append('<canvas id="results-graph"><...
How do I change the value of a global variable inside of a function
... reference the variable inside the function; no magic, just use it's name. If it's been created globally, then you'll be updating the global variable.
You can override this behaviour by declaring it locally using var, but if you don't use var, then a variable name used in a function will be global ...
Difference between := and = operators in Go
What is the difference between the = and := operators, and what are the use cases for them? They both seem to be for an assignment?
...
How can I use redis with Django?
...This is usually done by setting a TTL for the key: redis.io/commands/ttl . If the key expires, you must go to the DB. So if the key is in redis, then you use it. Note that the simple implementation of this causes some problems: when a popular key expires you have en.wikipedia.org/wiki/Thundering_her...
Keyboard shortcut to paste clipboard content into command prompt window (Win XP) [closed]
...(CMD) I use:
; Redefine only when the active window is a console window
#IfWinActive ahk_class ConsoleWindowClass
; Close Command Window with Ctrl+w
$^w::
WinGetTitle sTitle
If (InStr(sTitle, "-")=0) {
Send EXIT{Enter}
} else {
Send ^w
}
return
; Ctrl+up / Down to scroll command wind...
Initialization of all elements of an array to one default value in C++?
...ensions or you can depend on implementation-defined behavior as a shortcut if that's acceptable.
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What is the relationship between the docker host OS and the container base image OS?
...Ubuntu 12.04 (for example) and then I can install a Fedora container or a different version of ubuntu? (there is an example where the user installed busybox in the container.)
...
converting a .net Func to a .net Expression
...at all. Func<T> represents a generic delegate and not an expression. If there's any way you could do so (due to optimizations and other things done by the compiler, some data might be thrown away, so it might be impossible to get the original expression back), it'd be disassembling the IL on t...
Regex for string not ending with given suffix
...
You don't give us the language, but if your regex flavour support look behind assertion, this is what you need:
.*(?<!a)$
(?<!a) is a negated lookbehind assertion that ensures, that before the end of the string (or row with m modifier), there is not th...