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How to get the source directory of a Bash script from within the script itself?
...
#!/bin/bash
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
is a useful one-liner which will give you the full directory name of the script no matter where it is being called from.
It will work as long as the last component of the p...
Is floating point math broken?
...s format as a whole number times a power of two; rational numbers (such as 0.1, which is 1/10) whose denominator is not a power of two cannot be exactly represented.
For 0.1 in the standard binary64 format, the representation can be written exactly as
0.1000000000000000055511151231257827021181583...
Sort a list by multiple attributes?
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edited Apr 24 '18 at 22:05
smci
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answered Nov...
Two-dimensional array in Swift
...Int]] = []
OR if you need an array of predefined size (as mentioned by @0x7fffffff in comments):
// 2 dimensional array of arrays of Ints set to 0. Arrays size is 10x5
var arr = Array(count: 3, repeatedValue: Array(count: 2, repeatedValue: 0))
// ...and for Swift 3+:
var arr = Array(repeating: ...
Replacing NULL with 0 in a SQL server query
...ults for the first three columns I get NULL . How can I replace it with 0 ?
11 Answers
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iPad Safari scrolling causes HTML elements to disappear and reappear with a delay
...ou can do this with an empty 3d transform:
-webkit-transform: translate3d(0,0,0)
Particularly, you'll need this on child elements that have a position:relative; declaration (or, just go all out and do it to all child elements).
Not a guaranteed fix, but fairly successful most of the time.
Hat t...
What's the best way to send a signal to all members of a process group?
...
308
You don't say if the tree you want to kill is a single process group. (This is often the case ...
Pandas - How to flatten a hierarchical index in columns
...et the columns to the top level:
df.columns = df.columns.get_level_values(0)
Note: if the to level has a name you can also access it by this, rather than 0.
.
If you want to combine/join your MultiIndex into one Index (assuming you have just string entries in your columns) you could:
df.column...
show all tags in git log
... namespace) is purely local matter; what one repository has in 'refs/tags/v0.1.3', other can have in 'refs/tags/sub/v0.1.3' for example.
So when you create signed tag 'A', you have the following situation (assuming that it points at some commit)
35805ce <--- 5b7b4ead <=== refs/t...
Is it possible to declare two variables of different types in a for loop?
...tax has been supported in gcc and clang for years (since gcc-7 and clang-4.0) (clang live example). This allows us to unpack a tuple like so:
for (auto [i, f, s] = std::tuple{1, 1.0, std::string{"ab"}}; i < N; ++i, f += 1.5) {
// ...
}
The above will give you:
int i set to 1
double f set...