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How to pipe input to a Bash while loop and preserve variables after loop ends
...
Also, as noted by Gareth Rees in his answer, you can sometimes use a here string:
while read i; do echo $i; done <<< "$FILECONTENT"
This doesn't require shopt; you may be able to save a process using it.
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Pointers vs. values in parameters and return values
...mb for receivers is, "If in doubt, use a pointer."
Slices, maps, channels, strings, function values, and interface values are implemented with pointers internally, and a pointer to them is often redundant.
Elsewhere, use pointers for big structs or structs you'll have to change, and otherwise pass v...
“unary operator expected” error in Bash if condition
...rely on
if [[ $aug1 == "and" ]];
to compare the value of $aug1 with the string and.
If you use [ ... ], you always need to remember to double quote variables like this:
if [ "$aug1" = "and" ];
If you don't quote the variable expansion and the variable is undefined or empty, it vanishes from t...
curl -GET and -X GET
...them in the request body with POST, put them at the end of the URL's query string and issue a GET, with the use of `-G. Like this:
curl -d name=daniel -d grumpy=yes -G https://example.com/
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Accessing member of base class
...ord. Here is an example of how they work:
class Animal {
public name: string;
constructor(name: string) {
this.name = name;
}
move(meters: number) {
console.log(this.name + " moved " + meters + "m.");
}
}
class Horse extends Animal {
move() {
consol...
WebException how to get whole response with a body?
... {
WebClient client = new WebClient();
client.Encoding = Encoding.UTF8;
string content = client.DownloadString("https://sandiegodata.atlassian.net/wiki/pages/doaddcomment.action?pageId=524365");
Console.WriteLine(content);
Console.ReadKey();
} catch (WebException ex) {
var resp = new StreamRea...
Ruby class types and case statements
... the when clause. In Ruby
case item
when MyClass
...
when Array
...
when String
...
is really
if MyClass === item
...
elsif Array === item
...
elsif String === item
...
Understand that case is calling a threequal method (MyClass.===(item) for example), and that method can be defined to do wha...
Best practices for overriding isEqual: and hash
...iplying the result by each variable hash your result will overflow. eg. [NSString hash] creates large values. If you have 5+ variables it's easy to overflow with this algorithm. It'll result in everything mapping to the same hash, which is bad. See my response: stackoverflow.com/a/4393493/276626
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Cannot send a content-body with this verb-type
...= (HttpWebRequest)WebRequest.Create(strServer + strURL.Split('&')[1].ToString());
Header(ref request, p_Method);
And the method Header:
private void Header(ref HttpWebRequest p_request, string p_Method)
{
p_request.ContentType = "application/x-www-form-urlencoded";
p_request.Method =...
Log exception with traceback
...d in the logs. It is then necessary to pass them explicitly to the message string as show below.
– Edgar H
Jul 16 at 7:55
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