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Java: Check if enum contains a given string?
...
This should do it:
public static boolean contains(String test) {
for (Choice c : Choice.values()) {
if (c.name().equals(test)) {
return true;
}
}
return false;
}
This way means you do not have to worry about adding additional enum values ...
Python assigning multiple variables to same value? list behavior
...>>> a
1
>>> b
2
>>> c
3
>>> a,b,c = ({'test':'a'},{'test':'b'},{'test':'c'})
>>> a
{'test': 'a'}
>>> b
{'test': 'b'}
>>> c
{'test': 'c'}
>>>
share
...
Function overloading in Javascript - Best practices
...bject can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test']) { } //if test param exists, do something..
}
foo(1, 2, {"method":"add"});
foo(3, 4, {"test":"equals", "bar":"tree"});
Then you can handle it anyway you want in your method. [Switch, if-else, etc.]
...
Are PHP Variables passed by value or by reference?
... reference using an '&'.
Assigned by value/reference example:
$var1 = "test";
$var2 = $var1;
$var2 = "new test";
$var3 = &$var2;
$var3 = "final test";
print ("var1: $var1, var2: $var2, var3: $var3);
output:
var1: test, var2: final test, var3: final test
Passed by value/reference example:...
How to check if a string is a valid JSON string in JavaScript without using Try/Catch
...a regexp that check for a valid JSON, something like:
if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
//the json is ok
}else{
//the json is not ok
}
ED...
How do I empty an array in JavaScript?
... only reference the array by its original variable A.
This is also the fastest solution.
This code sample shows the issue you can encounter when using this method:
var arr1 = ['a','b','c','d','e','f'];
var arr2 = arr1; // Reference arr1 by another variable
arr1 = [];
console.log(arr2); // Outpu...
Multiple working directories with Git?
...le, when $GIT_DIR=/path/main/.git the command git worktree add /path/other/test-next next creates:
the linked working tree in /path/other/test-next and
also creates a $GIT_DIR/worktrees/test-next directory (or $GIT_DIR/worktrees/test-next1 if test-next is already taken).
Within a linked work...
How do I pass extra arguments to a Python decorator?
...to reuse decorator and decrease nesting
import functools
def myDecorator(test_func=None,logIt=None):
if not test_func:
return functools.partial(myDecorator, logIt=logIt)
@functools.wraps(test_func)
def f(*args, **kwargs):
if logIt==1:
print 'Logging level 1 ...
Python's time.clock() vs. time.time() accuracy?
...me() but exists also with time.clock(), so you should never run one timing test only, but always run a series of test and look at mean/variance of the times.
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#pragma pack effect
...rly. For example, given 4-byte integers and the following struct:
struct Test
{
char AA;
int BB;
char CC;
};
The compiler could choose to lay the struct out in memory like this:
| 1 | 2 | 3 | 4 |
| AA(1) | pad.................. |
| BB(1) | BB(2) | BB(3) | BB(4) |
| ...