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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...
Get integer value from string in swift
...wift 2.0 you can initialize Integer using constructor
var stringNumber = "1234"
var numberFromString = Int(stringNumber)
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How to round up a number to nearest 10?
...To/2)?-$mod:$roundTo-$mod);
}
This code:
echo roundToTheNearestAnything(1234, 10).'<br>';
echo roundToTheNearestAnything(1234, 5).'<br>';
echo roundToTheNearestAnything(1234, 15).'<br>';
echo roundToTheNearestAnything(1234, 167).'<br>';
Will output:
1230
1235
1230
1169
...
Exposing a port on a live Docker container
...ard traffic to the original container.
# docker run \
--rm \
-p $PORT:1234 \
verb/socat \
TCP-LISTEN:1234,fork \
TCP-CONNECT:$TARGET_CONTAINER_IP:$TARGET_CONTAINER_PORT
Worked Example
Launch a web-service that listens on port 80, but do not expose its internal port 80 (oops!):
# d...
regex for zip-code
...
Hi what about the condition 123451234 without space
– Ajay Suwalka
Oct 10 '14 at 11:42
4
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How to change value of process.env.PORT in node.js?
...
For just one run (from the unix shell prompt):
$ PORT=1234 node app.js
More permanently:
$ export PORT=1234
$ node app.js
In Windows:
set PORT=1234
In Windows PowerShell:
$env:PORT = 1234
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How are software license keys generated?
...nd guess the 13th (there's only 10 possibilities), leading to the infamous 1234-56789-1234
The algorithm for verifying is public, and looks something like this:
x = 3;
for(int i = 0; i < 12; i++)
{
x += (2 * x) ^ digit[i];
}
lastDigit = x % 10;
CORRECT WAY TO DO IT
Windows XP takes quite...
Escaping quotes and double quotes
...t-Process \\server\toto.exe @'
-batch=B -param="sort1;parmtxt='Security ID=1234'"
'@
(Mind that I assumed which quotes are needed, and which things you were attempting to escape.) If you want to work with the output, you may want to add the -NoNewWindow switch.
BTW: this was so important issue th...
How does the socket API accept() function work?
...clients, 10.0.0.1 and 10.0.0.2.
10.0.0.1 opens a connection on local port 1234 and connects to the server. Now the server has one socket identified as follows:
10.0.0.1:1234 - 192.168.1.1:80
Now 10.0.0.2 opens a connection on local port 5678 and connects to the server. Now the server has two...
Is there a standard for storing normalized phone numbers in a database?
...ferent depending on where you are dialing from. E.g. the US number 850-555-1234 has A=850 and E=555-1234, and then C=1 if dialing from US, and C=001 if dialing from UK. Point being regardless where you are dialing from, A and E are not dynamic in any way, correct?
– AaronLS
...