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What's the difference between ES6 Map and WeakMap?
... JavaScript with two arrays (one for keys, one for
values) shared by the 4 API methods. Such an implementation would have
two main inconveniences. The first one is an O(n) search (n being the
number of keys in the map). The second one is a memory leak issue.
With manually written maps, the a...
How to store standard error in a variable
...
A-312
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answered Jun 7 '09 at 16:57
Jonathan LefflerJonath...
How do I rename a column in a SQLite database table?
... |
edited Mar 21 at 21:54
answered Sep 15 '18 at 15:36
Lu...
Create MSI or setup project with Visual Studio 2012
...
edited Sep 19 '16 at 17:34
Peter Mortensen
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...
Check if an array contains any element of another array in JavaScript
...
648
Vanilla JS
ES2016:
const found = arr1.some(r=> arr2.includes(r))
ES6:
const found = arr...
SQLite UPSERT / UPDATE OR INSERT
...
This is a late answer. Starting from SQLIte 3.24.0, released on June 4, 2018, there is finally a support for UPSERT clause following PostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age...
Find the IP address of the client in an SSH session
...gin script.
Extract the IP:
$ echo $SSH_CLIENT | awk '{ print $1}'
1.2.3.4
$ echo $SSH_CONNECTION | awk '{print $1}'
1.2.3.4
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C# - how to determine whether a Type is a number
...tive types are Boolean, Byte,
SByte, Int16, UInt16, Int32, UInt32,
Int64, UInt64, Char, Double,and
Single.
Taking Guillaume's solution a little further:
public static bool IsNumericType(this object o)
{
switch (Type.GetTypeCode(o.GetType()))
{
case TypeCode.Byte:
case Type...
Add icon to submit button in twitter bootstrap 2
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KyleMit
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answered Feb 22 '12 at 11:33
Simon Cunni...
How to stop an animation (cancel() does not work)
...
answered Nov 6 '10 at 9:47
CommonsWareCommonsWare
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