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xpath find if node exists
...using xpath in Java using count():
int numberofbodies = Integer.parseInt((String) xPath.evaluate("count(/html/body)", doc));
if( numberofbodies==0) {
// body node missing
}
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Could not establish trust relationship for SSL/TLS secure channel — SOAP
...s more appropriate.
public static class Ssl
{
private static readonly string[] TrustedHosts = new[] {
"host1.domain.com",
"host2.domain.com"
};
public static void EnableTrustedHosts()
{
ServicePointManager.ServerCertificateValidationCallback =
(sender, cer...
Difference between `set`, `setq`, and `setf` in Common Lisp?
...undefined behaviour, because the value of ls is constant (like modifying a string literal in C). After (setq ls (list (list (list 1)))), (setf (car (car (car ls))) 5) works just like ls->val->val->val = 5 in C.
– kyle
Jun 13 '17 at 1:41
...
How to pause a YouTube player when hiding the iframe?
...enablejsapi") === -1) {
// ...check whether there is already a query string or not:
// (ie. whether to prefix "enablejsapi" with a "?" or an "&")
var prefix = (iframes[i].src.indexOf("?") === -1) ? "?" : "&";
iframes[i].src += prefix + "enablejsapi=true";
}
...
No output to console from a WPF application?
...anagedCodeSecurity]
public static class ConsoleManager
{
private const string Kernel32_DllName = "kernel32.dll";
[DllImport(Kernel32_DllName)]
private static extern bool AllocConsole();
[DllImport(Kernel32_DllName)]
private static extern bool FreeConsole();
[DllImport(Kern...
Setting table column width
... just put the nr. of the respective column into the parenthesis instead of stringing them together with the adjacent selector. Like this, for example:
<style>
.mytable tr > *:nth-child(1) { width:15%; }
.mytable tr > *:nth-child(2) { width:70%; }
.mytable tr > *:nth-child...
Precise Financial Calculation in JavaScript. What Are the Gotchas?
...blem here is that e.g. Money(0.1)means that the JavaScript lexer reads the string "0.1" from the source and then converts it to a binary floating point and then you already did an unintended rounding. The problem is about representation (binary vs decimal) not about precision.
–...
How to efficiently build a tree from a flat structure?
...
Tip: use console.log(JSON.stringify(root, null, 2)); to pretty print the output.
– aloisdg moving to codidact.com
Oct 17 '18 at 14:38
...
Import CSV file into SQL Server
...pace SqlBulkInsertExample
{
class Program
{
static void Main(string[] args)
{
DataTable prodSalesData = new DataTable("ProductSalesData");
// Create Column 1: SaleDate
DataColumn dateColumn = new DataColumn();
dateColumn.DataType...
Setting the correct encoding when piping stdout in Python
...
Encoding / decoding every string excplictly is bound to cause bugs when a encode or decode call is missing or added once to much somewhere. The output encoding can be set when output is a terminal, so it can be set when output is not a terminal. The...