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How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
...en the loosely == equal operator and the strict === identical operator is exactly explained in the manual:
Comparison Operators
┌──────────┬───────────┬───────────────────────────────...
Change type of varchar field to integer: “cannot be cast automatically to type integer”
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There is no implicit (automatic) cast from text or varchar to integer (i.e. you cannot pass a varchar to a function expecting integer or assign a varchar field to an integer one), so you must specify an explicit cast using ALTER TABLE ... ALTER COLUMN ... TYPE ... USING...
What exactly is a C pointer if not a memory address?
...be some kind of ID or handle or a combination of several IDs (say hello to x86 segments and offsets) and not necessarily a real memory address. This ID could be anything, even a fixed-size text string. Non-address representations may be especially useful for a C interpreter.
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Which iOS app version/build number(s) MUST be incremented upon App Store release?
...of the conditions is "You cannot re-use Version Numbers," but in the last example, version numbers are staying the same while build numbers are increasing. Am I misinterpreting something?
– Emil
Mar 20 '18 at 17:05
...
Can pandas automatically recognize dates?
...ively surprised by the fact that while reading data from a data file (for example) pandas is able to recognize types of values:
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Does JavaScript have a built in stringbuilder class?
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If you have to write code for Internet Explorer make sure you chose an implementation, which uses array joins. Concatenating strings with the + or += operator are extremely slow on IE. This is especially true for IE6. On modern browsers += is usually just as fast ...
In Node.js, how do I “include” functions from my other files?
...
You can require any js file, you just need to declare what you want to expose.
// tools.js
// ========
module.exports = {
foo: function () {
// whatever
},
bar: function () {
// whatever
}
};
var zemba = function () {
}
And in your app file:
// app.js
// ======
var tools = re...
What is a monad?
... looked at Haskell recently, what would be a brief, succinct, practical explanation as to what a monad essentially is?
46...
Python “SyntaxError: Non-ASCII character '\xe2' in file”
... got a stray byte floating around. You can find it by running
with open("x.py") as fp:
for i, line in enumerate(fp):
if "\xe2" in line:
print i, repr(line)
where you should replace "x.py" by the name of your program. You'll see the line number and the offending line(s). ...
How do I create a nice-looking DMG for Mac OS X using command-line tools?
... may have to reboot after this change (it doesn't work otherwise on Mac OS X Server 10.4).
Create a R/W DMG. It must be larger than the result will be. In this example, the bash variable "size" contains the size in Kb and the contents of the folder in the "source" bash variable will be copied into t...