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How to get a pixel's x,y coordinate color from an image?
Is there any way to check if a selected(x,y) point of a PNG image is transparent?
4 Answers
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Write a program to find 100 largest numbers out of an array of 1 billion numbers
...ulate this probability. For example, lets assume the numbers were randomly selected uniformly from {0, 1}, the expected value of (i-K)th number (out of i numbers) is (i-k)/i, and chance of a random variable being larger than this value is 1-[(i-k)/i] = k/i.
Thus, the expected number of insertions ...
How can I make an “are you sure” prompt in a Windows batchfile?
... and back for me. Only thing is as much as it helps me I keep accidentally selecting that command off my command buffer and mass overwriting uncommited changes.
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Summarizing multiple columns with dplyr? [duplicate]
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I mean, the behavior like in select would be great: summarize(df, a:c, d=paste(d, collaspe =',' ) . Just want to put more original columns in for reference
– biocyberman
Aug 8 '15 at 17:28
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The difference between the 'Local System' account and the 'Network Service' account?
...-20)
If trying to schedule a task using it, enter NETWORK SERVICE into the Select User or Group dialog
LocalSystem account (dangerous, don't use!)
Completely trusted account, more so than the administrator account. There is nothing on a single box that this account cannot do, and it has th...
How do DATETIME values work in SQLite?
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select * from table where creation between a and b;
– koem
Jun 21 '13 at 4:07
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Why does SSL handshake give 'Could not generate DH keypair' exception?
...DHE_.... The later would happen if I added BouncyCastle. If TLS_ECDHE_ was selected, MOST OF the time it worked, but not ALWAYS, so adding even BouncyCastle provider was unreliable (failed with same error, every other time or so). I guess somewhere in the Sun SSL implementation sometimes it choose D...
PowerShell: Store Entire Text File Contents in Variable
...and without sub-expressions, for example:
${C:file.txt} = ${C:file.txt} | select -skip 1
I became fascinated by this notation initially because it was very difficult to find out anything about it! Even the PowerShell 2.0 specification mentions it only once showing just one line using it--but with...
How to handle click event in Button Column in Datagridview?
...ast the sender to type DataGridView, we can get the Columns collection and select the current column using e.ColumnIndex. Then check if that object is of type DataGridViewButtonColumn.
Of course, if you need to distinguish between multiple buttons per grid, you can then select based on the column n...
How does Spring Data JPA differ from Hibernate for large projects?
...ryCustom {
List<MyObject> findByName(String name);
@Query("select * from my_object where name = ?0 or middle_name = ?0")
List<MyObject> findByFirstNameOrMiddleName(String name);
}
MyObjectRepositoryCustom - repository methods that are more complex and cannot be handled wi...