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In Typescript, How to check if a string is Numeric
.../ adding 1 corrects loss of precision from parseFloat (#15100)
return !isArray(val) && (val - parseFloat(val) + 1) >= 0;
}
rxjs/isNumeric.ts
Without rxjs isArray() function and with simplefied typings:
function isNumeric(val: any): boolean {
return !(val instanceof Array) &&am...
design a stack such that getMinimum( ) should be O(1)
...robably more efficient than two stacks of the same size (fewer overheads - arrays, list nodes etc) although it will depend on language.
– Jon Skeet
Mar 26 '09 at 10:30
...
How to read a large file line by line?
...
There is a file() function that returns an array of the lines contained in the file.
foreach(file('myfile.txt') as $line) {
echo $line. "\n";
}
share
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improve t...
When is it better to use String.Format vs string concatenation?
...hood of String.Concat is easy to guess (use Reflector). The objects in the array get converted to their string via ToString(). Then the total length is computed and only one string allocated (with the total length). Finally, each string is copied into the resulting string via wstrcpy in some unsafe ...
How to get names of enum entries?
...to query through keys and values and only return values:
let optionNames: Array<any> = [];
for (let enumValue in Option) {
let optionNameLength = optionNames.length;
if (optionNameLength === 0) {
this.optionNames.push([enumValue, Option[enumValue]]);
} else {
...
How do you convert a DataTable into a generic list?
...he value in DataRow. Is there any method? Instead of getting like list.ItemArray[0].
– Ramesh Durai
Sep 6 '12 at 13:24
...
Why is inserting in the middle of a linked list O(1)?
...
For purposes of comparing with an array, which is what that chart shows, it's O(1) because you don't have to move all the items after the new node.
So yes, they are assuming that you already have the pointer to that node, or that getting the pointer is tri...
Zoom to fit all markers in Mapbox or Leaflet
...o here is what I ended up doing:
////var group = new L.featureGroup(markerArray);//getting 'getBounds() not a function error.
////map.fitBounds(group.getBounds());
var bounds = L.latLngBounds(markerArray);
map.fitBounds(bounds);//works!
...
Inspect attached event handlers for any DOM element
...eners(document.getElementById("inputId")); but it returns invalid, with an array size of 1
– rich green
Sep 7 '17 at 3:09
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Deserialize json object into dynamic object using Json.net
...ows us to do this:
dynamic d = JObject.Parse("{number:1000, str:'string', array: [1,2,3,4,5,6]}");
Console.WriteLine(d.number);
Console.WriteLine(d.str);
Console.WriteLine(d.array.Count);
Output:
1000
string
6
Documentation here: LINQ to JSON with Json.NET
See also JObject.Parse and JArra...