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How does interfaces with construct signatures work?
...in interfaces are not implementable in classes; they're only for defining existing JS APIs that define a 'new'-able function. Here's an example involving interfaces new signatures that does work:
interface ComesFromString {
name: string;
}
interface StringConstructable {
new(n: string): Co...
Add a prefix string to beginning of each line
...
# If you want to edit the file in-place
sed -i -e 's/^/prefix/' file
# If you want to create a new file
sed -e 's/^/prefix/' file > file.new
If prefix contains /, you can use any other character not in prefix, or
escape the /, so the sed command becomes
's#^#/opt/workdir#'
# or...
用Javascript获取页面元素的位置（全） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...mpat"){
return {
width: Math.max(document.body.scrollWidth,
document.body.clientWidth),
height: Math.max(document.body.scrollHeight,
...
pandas GroupBy columns with NaN (missing) values
...Missing Data section of the docs:
NA groups in GroupBy are automatically excluded. This behavior is consistent with R, for example.
One workaround is to use a placeholder before doing the groupby (e.g. -1):
In [11]: df.fillna(-1)
Out[11]:
a b
0 1 4
1 2 -1
2 3 6
In [12]: df.fillna(-1...
String formatting: % vs. .format vs. string literal
...on 2.6 introduced the str.format() method with a slightly different syntax from the existing % operator. Which is better and for what situations?
...
How do I achieve the theoretical maximum of 4 FLOPs per cycle?
...ting point operations (double precision) per cycle be achieved on a modern x86-64 Intel CPU?
4 Answers
...
GetType() can lie?
...cessfully lied, right?
Well, yes and no... Consider that using this as an exploit would mean using your BadFoo instance as an argument to a method somewhere, that expects likely an object or a common base type for a hierarchy of objects. Something like this:
public void CheckIfInt(object ob)
{
...
Java code To convert byte to Hexadecimal
...want each byte String of that array to be converted to its corresponding hexadecimal values.
19 Answers
...
Converting numpy dtypes to native python types
..., how do I automatically convert it to its closest python data type? For example,
12 Answers
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