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In Java, what does NaN mean?
...
Taken from this page:
"NaN" stands for "not a number". "Nan"
is produced if a floating point
operation has some input parameters
that cause the operation to produce
some undefined result. For example,
0.0 divided by 0...
Remove all values within one list from another list? [duplicate]
...Error:
pass
return a
5 tries, average time 0.27 sec
def set_approach(a,b):
return list(set(a)-set(b))
5 tries, average time 0.0057 sec
Also I made another measurement with bigger inputs size for the last two functions
a = range(1,500000)
b = range(1,100000)
And the resul...
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...ined
;
Another difference is that when using new Array() you're able to set the size of the array, which affects the stack size. This can be useful if you're getting stack overflows (Performance of Array.push vs Array.unshift) which is what happens when the size of the array exceeds the size of t...
How do I split a string on a delimiter in Bash?
...
You can set the internal field separator (IFS) variable, and then let it parse into an array. When this happens in a command, then the assignment to IFS only takes place to that single command's environment (to read ). It then parses...
Is it better in C++ to pass by value or pass by constant reference?
...the new value of g.i from memory.
For more pratical rules, here is a good set of rules found in Move Constructors article (highly recommended reading).
If the function intends to change the argument as a side effect, take it by non-const reference.
If the function doesn't modify its argument and...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...名，这些名称在任何数据库中都不建议使用中文。
与 TaifunSQLite 功能类似，但TaifunSQLite是收费的，美刀。
1.2版本更新（2025/09/15）
默认sqlite3
优化库导入导出方法
.aix 拓展下载：
cn.fun123.SQ...
Removing double quotes from variables in batch file creates problems with CMD environment
...e end of the string (after removing both quotes from the string).
Input:
set widget="a very useful item"
set widget
set widget=%widget:"=%
set widget
Output:
widget="a very useful item"
widget=a very useful item
Note: To replace Double Quotes " with Single Quotes ' do the following:
set widg...
How to remove all null elements from a ArrayList or String Array?
...
You might be better off setting the values to null then removing at the end. The batchRemove in removeAll transverses the list, with a read and write location and iterates the list once, moving the read but not the write when it hits a null. .remove...
Get type of all variables
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Float vs Decimal in ActiveRecord
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