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Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation
...ble=false, updatable=false , doesn't it mean that you cannot insert value nor change the existing value? Why would you want to do that?
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remove all variables except functions
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Here's a one-liner that removes all objects except for functions:
rm(list = setdiff(ls(), lsf.str()))
It uses setdiff to find the subset of objects in the global environment (as returned by ls()) that don't have mode function (as returned by lsf.str())
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How to add an object to an array
How can I add an object to an array (in javascript or jquery)?
For example, what is the problem with this code?
13 Answ...
See what has been installed via MacPorts
Is there a way to see all I have installed via MacPorts?
1 Answer
1
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Example invalid utf8 string?
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The idea of patterns of ill-formed byte-sequences can be gotten from the table of well-formed byte sequences. See "Table 3-7. Well-Formed UTF-8 Byte Sequences" in the Unicode Standard 6.2.
Code Points First Byte Second Byte Third Byte Fourth Byte...
How do .gitignore exclusion rules actually work?
I'm trying to solve a gitignore problem on a large directory structure, but to simplify my question I have reduced it to the following.
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Loop inside React JSX
...hink of it like you're just calling JavaScript functions. You can't use a for loop where the arguments to a function call would go:
return tbody(
for (var i = 0; i < numrows; i++) {
ObjectRow()
}
)
See how the function tbody is being passed a for loop as an argument – leadin...
Send POST Request with Data Specified in File via Curl
I need to make a POST request via Curl from the command line. Data for this request is located in a file. I know that via PUT this could be done with the --upload-file option.
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Linux find file names with given string
I'm on Ubuntu, and I'd like to find all files in the current directory and subdirectories whose name contains the string "John". I know that grep can match the content in the files, but I have no idea how to use it with file names. Any help would be appreciated.
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Default parameters with C++ constructors [closed]
Is it good practice to have a class constructor that uses default parameters, or should I use separate overloaded constructors? For example:
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