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Get a pixel from HTML Canvas?
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An explanation would be in order.
– Peter Mortensen
Sep 5 at 18:11
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Invalid postback or callback argument. Event validation is enabled using '
...ed, use the
ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation."
I changed several codes, and finally I succeeded. My experience route:
1) I changed page attribute to EnableEventValidation="false". But it didn't work. (no...
Is Ruby pass by reference or by value?
...can't pass one to a method. Variables are always references to objects. In order to get an object that won't change out from under you, you need to dup or clone the object you're passed, thus giving an object that nobody else has a reference to. (Even this isn't bulletproof, though — both of the s...
git still shows files as modified after adding to .gitignore
... His files were already tracked by git because of an earlier commit, so in order to remove them, you have to create a new commit that removes them from the repository.
– mcls
Jul 19 '16 at 5:47
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How do I query using fields inside the new PostgreSQL JSON datatype?
...less there are quite specialized needs, such as legacy
assumptions about ordering of object keys.
Bold emphasis mine.
Performance benefits from general improvements to GIN indexes.
Postgres 9.5
Complete jsonb functions and operators. Add more functions to manipulate jsonb in place and for dis...
Printf width specifier to maintain precision of floating-point value
... the number of digits after the lead digit and decimal point.
So - 1 is in order. Note: This -1 is not in the initial int Digs = DECIMAL_DIG;
printf("%.*e\n", OP_DBL_Digs - 1, OneSeventh);
// 1.4285714285714285e-01
With "%f", the precision field is the number of digits after the decimal point.
F...
In Python, how does one catch warnings as if they were exceptions?
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You don't need the filterwarnings call in order to catch Warnings, at least in python 3. it just works.
– naught101
Apr 3 '19 at 6:37
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abort: no username supplied (see “hg help config”)
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How to create a drop shadow only on one side of an element?
...hat the black shadow must be the last, and has a negative spread (-3px) in order to prevent it from extendig beyond the corners.
Here the fiddle (change the color of the masking shadows to see how it really works).
div{
width: 100px;
height: 100px;
border: 1px solid pink;
b...
How to use ternary operator in razor (specifically on HTML attributes)?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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