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How do I deep copy a DateTime object?
...or now assume DateTime is returned from some opaque API that I can't just call over again. For example, I have a function that handles orders that returns a DateTime which is when the customer can next place an order. Calling the function to create a copy produces side effects I don't want.
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How can I get column names from a table in Oracle?
...u have 'no rows selected' then you could try to change USER_TAB_COLUMNS to all_tab_columns. To be 100% sure about result you could speficy owner.
– Dracontis
Feb 25 '15 at 9:01
2
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Checking the equality of two slices
...swer, and more highly voted is simply maddening...
– allyourcode
Feb 12 '15 at 7:54
5
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What are the differences between Rust's `String` and `str`?
...tr most commonly2 appears as &str: a reference to some UTF-8 data, normally called a "string slice" or just a "slice". A slice is just a view onto some data, and that data can be anywhere, e.g.
In static storage: a string literal "foo" is a &'static str. The data is hardcoded into the execu...
How to make a promise from setTimeout
...imer = 0;
let reject = null;
const promise = new Promise((resolve, _reject) => {
reject = _reject;
timer = setTimeout(resolve, delay, value);
});
return {
get promise() { return promise; },
cancel() {
if (timer) {
clearTi...
Why are elementwise additions much faster in separate loops than in a combined loop?
...
Upon further analysis of this, I believe this is (at least partially) caused by the data alignment of the four-pointers. This will cause some level of cache bank/way conflicts.
If I've guessed correctly on how you are allocating your arrays, they are likely to be aligned to the page line....
lsof survival guide [closed]
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To show all networking related to a given port:
lsof -iTCP -i :port
lsof -i :22
To show connections to a specific host, use @host
lsof -i@192.168.1.5
Show connections based on the host and the port using @host:port
lsof -i@...
Remote debugging with Android emulator
...sh -NL 5554:localhost:5554 -L 5555:localhost:5555 myuser@remote-server
killall adb; adb devices
I believe the emulator tries to notify a local adb server at startup; hence the need to restart adb in order for it to probe the local 5554+ ports.
Note that the localhost in the ssh command refers to ...
Why does Ruby have both private and protected methods?
...
protected methods can be called by any instance of the defining class or its subclasses.
private methods can be called only from within the calling object. You cannot access another instance's private methods directly.
Here is a quick practical exa...
How to save/restore serializable object to/from file?
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No need to call the close method on a reader within your using block. Dispose() is implicit and will take place even if an exception is raised within the block before the explicit Close(). Very useful block of code.
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