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String is immutable. What exactly is the meaning? [duplicate]
...e proceeding further with the fuss of immutability, let's just take a look into the String class and its functionality a little before coming to any conclusion.
This is how String works:
String str = "knowledge";
This, as usual, creates a string containing "knowledge" and assigns it a reference ...
Merge 2 arrays of objects
...{ name: "age", value: "28" },
{ name: "childs", value: '5' }
]
// Convert to key value dictionary or object
const convertToKeyValueDict = arrayObj => {
const val = {}
arrayObj.forEach(ob => {
val[ob.name] = ob.value
})
return val
}
// update or merge ...
Returning value that was passed into a method
I have a method on an interface:
3 Answers
3
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Why doesn't .NET/C# optimize for tail-call recursion?
...l generate the relevant opcodes (though for a simple recursion it may just convert the whole thing into a while loop directly). C#'s csc does not.
See this blog post for some details (quite possibly now out of date given recent JIT changes). Note that the CLR changes for 4.0 the x86, x64 and ia64 w...
How to include a font .ttf using CSS?
...
I also had trouble with Font Squirrel. success with font-converter.net
– Peter Hayman
Jun 21 at 5:24
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PSQLException: current transaction is aborted, commands ignored until end of transaction block
...e statement to illustrate the Exception:
CREATE TABLE moobar
(
myval INT
);
Java program causes the error:
public void postgresql_insert()
{
try
{
connection.setAutoCommit(false); //start of transaction.
Statement statement = connection.createStatement();
...
Slicing of a NumPy 2d array, or how do I extract an mxm submatrix from an nxn array (n>m)?
... x from your question. The buffer assigned to x will contain 16 ascending integers from 0 to 15. If you access one element, say x[i,j], NumPy has to figure out the memory location of this element relative to the beginning of the buffer. This is done by calculating in effect i*x.shape[1]+j (and mu...
Python string.join(list) on object array rather than string array
...on thing in the universe: join("sep", list) - and all elements of list get converted to their string representations. I've been really struggling to find a solution in python.
– Jason
Feb 23 '18 at 13:12
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How do I read configuration settings from Symfony2 config.yml?
... the first approach and the documentation, it's that the config values are converted into parameters in the MyNiceProjectExtension->load() method with this line: $container->setParameter( 'my_nice_project.contact_email', $processedConfig[ 'contact_email' ]);. Thanks Xavi!
...
Resolve promises one after another (i.e. in sequence)?
... take your work
const urls = ['/url1', '/url2', '/url3', '/url4']
// next convert each item to a function that returns a promise
const funcs = urls.map(url => () => $.ajax(url))
// execute them serially
serial(funcs)
.then(console.log.bind(console))
...