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Check whether variable is number or string in JavaScript
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If you're dealing with literal notation, and not constructors, you can use typeof:.
typeof "Hello World"; // string
typeof 123; // number
If you're creating numbers and strings via a constructor, such as var foo = new String("foo"), you should keep in m...
Insert HTML with React Variable Statements (JSX)
... Make sure you pass a method to the dangerouslySetInnerHTML and not a hash. According to the docs, it's dangerous to just pass a hash. Reference: facebook.github.io/react/tips/dangerously-set-inner-html.html
– criticerz
Jun 9 '16 at 14:55
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Is it not possible to stringify an Error using JSON.stringify?
...toJSON() may not be defined for Errors specifically, the method is still standardized for objects in general (ref: step 3). So, the risk of collisions or conflicts is minimal.
Though, to still avoid it completely, JSON.stringify()'s replacer parameter can be used instead:
function replaceErrors(ke...
Click through div to underlying elements
...phaImageLoader, you can even put transparent .PNG/.GIFs in the overlay div and have clicks flow through to elements underneath.
CSS:
pointer-events: none;
background: url('your_transparent.png');
IE11 conditional:
filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src='your_transparent.p...
Using braces with dynamic variable names in PHP
...t $variableName between {} :
${$variableName} = $value;
Using {} is only mandatory when the name of your variable is itself a composition of multiple values, like this :
${$variableNamePart1 . $variableNamePart2} = $value;
It is nevertheless recommended to always use {}, because it's more readable...
How to list only the file names that changed between two commits?
...ly HEAD~10 HEAD~5
to see the differences between the tenth latest commit and the fifth latest (or so).
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How to install a specific JDK on Mac OS X?
...t I'm a bit surprised to only see downloadable versions for Linux, Windows and Solaris ...
16 Answers
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“Failed to load platform plugin ”xcb“ ” while launching qt5 app on linux without qt installed
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shows that xcb depends on libQt5DBus.so.5 in addition to libQt5Core.so.5 and libQt5Gui.so.5 (and many other system libs). Add libQt5DBus.so.5 to your collection of shared libs and you should be ready to move on.
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How to add 30 minutes to a JavaScript Date object?
...(date, minutes) {
return new Date(date.getTime() + minutes*60000);
}
And just in case this is not obvious, the reason we multiply minutes by 60000 is to convert minutes to milliseconds.
Be Careful with Vanilla Javascript. Dates Are Hard!
You may think you can add 24 hours to a date to get to...
Git push won't do anything (everything up-to-date)
...gin develop
That will: create a new branch on the remote called develop; and bring that branch up to date with your local develop branch; and set develop to push to origin/develop so that in future, git push without arguments will push develop automatically.
If you want to push your local develop...