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How to check if an object is an array?
I'm trying to write a function that either accepts a list of strings, or a single string. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
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How to duplicate object properties in another object?
..., while Chrome (45+) and Opera (32+) require the 'experimental flag' to be set.
Support is improving, with the lastest versions of Chrome, Firefox, Opera, Safari and Edge supporting it (IE notably has no support.) Transpilers are available as well, like Babel and Traceur. See here for more details....
Best practices for overriding isEqual: and hash
...* result + [self isSelected] ? yesPrime : noPrime;. I then found this was setting result to (eg) 1231, I assume due to the ? operator taking precedence. I fixed the issue by adding brackets: result = prime * result + ([self isSelected] ? yesPrime : noPrime);
– Ashley
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django MultiValueDictKeyError error, how do I deal with it
...eck this in the Chrome/Firefox DEV tool's "Network" panel. That is why you set False as the default value: if got null, make it false.
– WesternGun
Mar 7 '18 at 12:03
add a co...
sql server #region
...END /** delete queries **/
BEGIN /** update queries **/
UPDATE sometable SET something = 1
END /** update queries **/
This method shows up fairly nice in management studio and is really helpful in reviewing code. The collapsed piece looks sort of like:
BEGIN /** delete queries **/ ... /** del...
Change default global installation directory for node.js modules in Windows?
... also change the npm cache location to a local directory using npm config set cache <new cache location> --global if you run into problems while installing modules and cache is in a shared drive. I got this error, ENOENT: no such file or directory when the cache was in a shared drive
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使用Activity启动器组件 · App Inventor 2 中文网
... HelloPurr 完成时（如果完成），将调用原始应用程序的 AfterActivity 方法。
如果你要启动另一个 App Inventor 应用程序，请确保使用正确的包名称。 例如，如果有人发布某个应用程序的源代码（aia 文件），并且你重新打包该应用程...
“The file ”MyApp.app“ couldn't be opened because you don't have permission to view it” when running
...e Xcode6 GM. I encountered the same problem. What I did was to go to Build Settings -> Build Options. Then I changed the value of the "Compiler for C/C++/Objective-C" to Default Compiler.
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How to split a string, but also keep the delimiters?
I have a multiline string which is delimited by a set of different delimiters:
23 Answers
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Javascript what is property in hasOwnProperty?
...hasOwnProperty returns true only for the properties that were specifically set in the constructor, or added to the instance later.
to determine if p is defined at all, anywhere, for the object, use if(p instanceof object), where p evaluates to a property-name string.
For example, by default all o...