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How to check if object property exists with a variable holding the property name?
...otypeOf(yoshi, hattori);
if ("sneak" in yoshi)
console.log("Yoshi can now sneak");
if (!("creep" in hattori))
console.log("Hattori cannot creep");
Object.setPrototypeOf(hattori, kuma);
if ("creep" in hattori)
console.log("Hattori can now creep");
if ("creep" in yoshi)
console.log(...
How to go back to lines edited before the last one in Vim?
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Till now, I used to use this hack of undo followed by redo to go to last changed position. i.e. "u" and then "ctrl+r".
– Mayank Jaiswal
Dec 16 '15 at 5:25
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How to get all count of mongoose model?
How can I know the count of a model that data has been saved? there is a method of Model.count() , but it doesn't seem to work.
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Generate random password string with requirements in javascript
...loor(Math.random() * x.length)] }).join('');
With Letter / Number Rules
Now, a variation on the above. This will generate three random strings from the given charsets (letter, number, either) and then scramble the result.
Please note the below uses sort() for illustrative purposes only. For pro...
How can I make a div stick to the top of the screen once it's been scrolled to?
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your edit does indeed fill the needs of the question now but you still have a problem when the page scrolls back to the top again. you could after reaching the element scrollTop store it somewhere, and when the page hits that position again (when scrolling upwards) change the ...
Is there a goto statement in Java?
...Didn't you describe why it's reserved? It's a keyword, so it can't be used now; later goto could spring to life without causing problems. If it wasn't a reserved word, it could be used now to produce code (int goto = 2;) which would break if goto was introduced.
– user146043
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is_null($x) vs $x === null in PHP [duplicate]
PHP has two (that I know of, and three if you count isset() ) methods to determine if a value is null: is_null() and === null . I have heard, but not confirmed, that === null is faster, but in a code review someone strongly suggested that I use is_null() instead as it is specifically design...
How do I comment on the Windows command line?
...essor (such as within complex if or for statements) so I generally use rem nowadays. In any case, it's a hack, suborning the label infrastructure to make it look like a comment when it really isn't. For example, try replacing rem with :: in the following example and see how it works out:
if 1==1 (
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How to disable JavaScript in Chrome Developer Tools?
...gt; Settings > "Disable Javascript" -> Refresh works! Would love to know WHY it's not working in regular mode. I haven't found any tickets for this issue. Seems to only happen to certain users.
– Phil Tune
Oct 29 '14 at 19:16
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How to make an Android device vibrate?
I wrote an Android application. Now, I want to make the device vibrate when a certain action occurs. How can I do this?
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