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How to inspect Javascript Objects
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The for-in loops for each property in an object or array. You can use this property to get to the value as well as change it.
Note: Private properties are not available for inspection, unless you use a "spy"; basically, you over...
How to check if a Constraint exists in Sql server?
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try this:
SELECT
*
FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
WHERE CONSTRAINT_NAME ='FK_ChannelPlayerSkins_Channels'
-- EDIT --
When I originally answered this question, I was thinking "Foreign Key" because the original question a...
Node: log in a file instead of the console
Can I configure console.log so that the logs are written on a file instead of being printed in the console?
19 Answers
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How can I have a newline in a string in sh?
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The solution is to use $'string', for example:
$ STR=$'Hello\nWorld'
$ echo "$STR" # quotes are required here!
Hello
World
Here is an excerpt from the Bash manual page:
Words of the form $'string' are treated specially. The word expands to
string, ...
Function to clear the console in R and RStudio
...d do that to reduce the amount of typing. (For instance, I think you could set it up where something like clr() or clr runs the command shell("cls") or shell("clear").)
– Ryan Blanchard
Jun 4 '18 at 7:38
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NumPy: function for simultaneous max() and min()
numpy.amax() will find the max value in an array, and numpy.amin() does the same for the min value. If I want to find both max and min, I have to call both functions, which requires passing over the (very big) array twice, which seems slow.
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When should we use mutex and when should we use semaphore
...ith identical locks and keys. The semaphore count - the count of keys - is set to 4 at beginning (all four toilets are free), then the count value is decremented as people are coming in. If all toilets are full, ie. there are no free keys left, the semaphore count is 0. Now, when eq. one person leav...
boundingRectWithSize for NSAttributedString returning wrong size
...od for UItextView -sizeThatFits which returns the proper size for the text set.
So instead of using boundingRectWithSize, create an UITextView, with a random frame, and call its sizeThatFits with the respective width and CGFLOAT_MAX height.
It returns the size that will have the proper height.
U...
String length in bytes in JavaScript
In my JavaScript code I need to compose a message to server in this format:
13 Answers
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Remove an item from a dictionary when its key is unknown
What is the best way to remove an item from a dictionary by value, i.e. when the item's key is unknown? Here's a simple approach:
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