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What is a NullPointerException, and how do I fix it?
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When you declare a reference variable (i.e. an object) you are really creating a pointer to an object. Consider the following code where you declare a variable of primitive type int:
int x;
x = 10;
In this example, the variable x is an int and Java will initialize it to 0 for you. When yo...
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
... I adapted example 4 with SubMatches for treating more complex regex, basically I don't use replace when splitting, if anyone is interested: stackoverflow.com/questions/30218413/…
– Armfoot
May 13 '15 at 14:58
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How can I limit possible inputs in a HTML5 “number” element?
.../>
if you add both a max and a min value you can specify the range of allowed values:
<input type="number" min="1" max="999" />
The above will still not stop a user from manually entering a value outside of the specified range. Instead he will be displayed a popup telling him to enter ...
Converting string to byte array in C#
... Apr 18 '13 at 0:54
Timothy RandallTimothy Randall
13.7k11 gold badge1212 silver badges2727 bronze badges
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Auto line-wrapping in SVG text
...h, it needs to use one of the featurestrings defined in the svg spec. The fallback will never be used in your example. See w3.org/TR/SVG11/feature.html and w3.org/TR/SVG11/struct.html#SwitchElement.
– Erik Dahlström
Feb 14 '11 at 13:43
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What is the purpose of a self executing function in javascript?
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It's all about variable scoping. Variables declared in the self executing function are, by default, only available to code within the self executing function. This allows code to be written without concern of how variables are nam...
How do I deal with certificates using cURL while trying to access an HTTPS url?
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This error is related to a missing package: ca-certificates. Install it.
In Ubuntu Linux (and similar distro):
# apt-get install ca-certificates
In CygWin via Apt-Cyg
# apt-cyg install ca-certificates
In Arch Linux (Raspberry Pi)
# pacman -S ca-certificates
The documentation te...
Optional query string parameters in ASP.NET Web API
...ect using [FromUri] doesn't directly answer the original question. It basically says populate these models with the values from the Uri. The models properties would need to be nullable or a reference type in order for them to support being optional. Added additional information.
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How to know user has clicked “X” or the “Close” button?
...anted to perform something specific on the FormClosing event, like closing all MdiChildren before closing the MDIContainerForm, or event checking for unsaved changes. Under these circumstances, we don't need, according to me, to differentiate from either buttons.
Closing by ALT+F4 will also trigger...
Passing variables through handlebars partial
...andlebars.js in an express.js application. To keep things modular, I split all my templates in partials.
8 Answers
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