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In Typescript, How to check if a string is Numeric
...y to convert a string to a number is with Number, not parseFloat.
Number('1234') // 1234
Number('9BX9') // NaN
You can also use the unary plus operator if you like shorthand:
+'1234' // 1234
+'9BX9' // NaN
Be careful when checking against NaN (the operator === and !== don't work as expected wi...
Principal component analysis in Python
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11 Answers
11
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Representing and solving a maze given an image
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10 Answers
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What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
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91
The order of evaluation of subexpressions, including
the arguments of a function call and
oper...
How can I have two fixed width columns with one flexible column in the center?
...don't need the justify-content and align-items here.
img {
max-width: 100%;
}
#container {
display: flex;
x-justify-content: space-around;
x-align-items: stretch;
max-width: 1200px;
}
.column.left {
width: 230px;
flex: 0 0 230px;
}
.column.right {
width: 230px;
f...
Check if all elements in a list are identical
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General method:
def checkEqual1(iterator):
iterator = iter(iterator)
try:
first = next(iterator)
except StopIteration:
return True
return all(first == rest for rest in iterator)
One-liner:
def checkEqual2(iterator):
r...
How to get the seconds since epoch from the time + date output of gmtime()?
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126
If you got here because a search engine told you this is how to get the Unix timestamp, stop r...
How to compare two colors for similarity/difference
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19 Answers
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Using comparison operators in Scala's pattern matching system
...i.e. an if and a boolean expression after the pattern:
a match {
case 10 => println("ten")
case x if x > 10 => println("greater than ten")
case _ => println("less than ten")
}
Edit: Note that this is more than superficially different to putting an if after the =>, becau...
Splitting a list into N parts of approximately equal length
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31 Answers
31
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