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How to delete a cookie?
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You can do this by setting the date of expiry to yesterday.
Setting it to "-1" doesn't work. That marks a cookie as a Sessioncookie.
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Converting a List to a comma separated string
...up the lengths to precalculate the buffer size, and also "primes the pump" by appending the first string outside the loop, and then, inside the loop, unconditionally appending the delimiter before the next string. Combined with some unsafe/internal tricks, it should be very fast.
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Convert data.frame column to a vector?
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If you just use the extract operator it will work. By default, [] sets option drop=TRUE, which is what you want here. See ?'[' for more details.
> a1 = c(1, 2, 3, 4, 5)
> a2 = c(6, 7, 8, 9, 10)
> a3 = c(11, 12, 13, 14, 15)
> aframe = data.frame(a1, a2, a3)
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USB Debugging option greyed out
...eveloper”. Your’re not done yet.
Go back to your phone’s home page by pushing the home button.
Go to “Settings”.
Go to “Developer options”
Click the “USB debugging- Turn on debug mode when USB is connected”. A blue checkmark will appear.
(EDIT: If USB Debugging is greyed out...
Round a Floating Point Number Down to the Nearest Integer?
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x//1
The // operator returns the floor of the division. Since dividing by 1 doesn't change your number, this is equivalent to floor but no import is needed.
Notes:
This returns a float
This rounds towards -∞
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Syntax for a single-line Bash infinite while loop
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while true; do foo; sleep 2; done
By the way, if you type it as a multiline (as you are showing) at the command prompt and then call the history with arrow up, you will get it on a single line, correctly punctuated.
$ while true
> do
> echo "hello"
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Highlight bash/shell code in markdown
... @JorgeOrpinel I believe I dug it up in the list of languages supported by GitHub’s syntax highlighter here.
– Anton Strogonoff
Dec 1 '19 at 14:30
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How to focus on a form input text field on page load using jQuery?
...ritating for them to have the focus stolen away.
You could check for this by adding onfocus attributes in each of your <input> elements to record whether the user has already focussed on a form field and then not stealing the focus if they have:
var anyFieldReceivedFocus = false;
function f...
How to convert string to char array in C++?
... to char array but not char* . I know how to convert string to char* (by using malloc or the way I posted it in my code) - but that's not what I want. I simply want to convert string to char[size] array. Is it possible?
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What can I use for good quality code coverage for C#/.NET? [closed]
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PartCover has essentially been replaced by OpenCover (github.com/sawilde/opencover), as PartCover stagnated with support only for .NET 2.
– David Keaveny
Aug 31 '11 at 3:21
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