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How to drive C#, C++ or Java compiler to compute 1+2+3+…+1000 at compile time?
In a recent interview, I was asked a really strange question. The interviewer asked me how can I compute 1+2+3+...+1000 just using compiler features. This means that I am not allowed to write a program and execute it, but I should just write a program that could drive the compiler to compute this su...
How to make Sequelize use singular table names
...ING,
}, {
hooks: {
beforeCount (options) {
options.raw = true;
}
},
tableName: 'people',
name: {
singular: 'person',
plural: 'people'
}
});
this will return "person" as an object when a single record is being queried and "people" as an...
How can I make setInterval also work when a tab is inactive in Chrome?
...ar startedAt, duration = 3000
var domain = [-100, window.innerWidth]
var range = domain[1] - domain[0]
function start() {
startedAt = Date.now()
updateTarget(0)
requestAnimationFrame(update)
}
function update() {
let elapsedTime = Date.now() - startedAt
// playback is a val...
Suppress/ print without b' prefix for bytes in Python 3
...if the data is not already UTF-8 compatible. E.g. when the data are actual raw bytes.
from binascii import hexlify
from codecs import encode # alternative
>>> print(hexlify(b"\x13\x37"))
b'1337'
>>> print(str(hexlify(b"\x13\x37"), "utf-8"))
1337
>>>> print(str(encode(...
How do I use itertools.groupby()?
...ion (see notebook)
Consecutive values over a threshold (see notebook)
Find ranges of numbers in a list or continuous items (see docs)
Find all related longest sequences
Take consecutive sequences that meet a condition (see related post)
Note: Several of the latter examples derive from Víctor Terr...
What is the difference between float and double?
...ision of 7 digits. While it may store values with very large or very small range (+/- 3.4 * 10^38 or * 10^-38), it has only 7 significant digits.
Type double, 64 bits long, has a bigger range (*10^+/-308) and 15 digits precision.
Type long double is nominally 80 bits, though a given compiler/OS pa...
How to sort strings in JavaScript
...order"
When "playing" with these implementations, I always noticed some strange "natural sorting order" choice, or rather mistakes (or omissions in the best cases).
Typically, special characters (space, dash, ampersand, brackets, and so on) are not processed correctly.
You will then find them app...
Storing Images in DB - Yea or Nay?
...many databases beat many files systems, even when we're only talking about raw speed.
The correct course of action is to make the right decision for your precise scenario, and to do that, you'll need some numbers and some use case estimates.
...
Missing Push Notification Entitlement
...entitlements file you made, right click in the empty file and select "Show Raw Keys/Values"
Add a new entry to the entitlements file called "aps-environment" and set it's value to "production"
One key note, if you were previously using the keychain-access-groups entitlement, you'll want to add that ...
How to calculate “time ago” in Java?
... him/her some love too.
This cleaned up version allows you to specify the range of time you might be interested in.
It also handles the " and " part a little differently. I often find when joining strings with a delimiter it's ofter easier to skip the complicated logic and just delete the last ...