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What's the difference between [ and [[ in Bash? [duplicate]
... FWIW, reference for the set of conditional expressions (like -f, -z etc) that can go inside [ or [[ is at Bash Reference Manual: Bash Conditional Expressions
– ShreevatsaR
May 2 '18 at 19:29
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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...e newly written data will show up at some point (barring network failures, etc), it may not be immediately available.
Edit: You only need to set slaveok when querying from secondaries, and only once per session.
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What is the shortcut in IntelliJ IDEA to find method / functions?
...keyboard setting in
System Preferences > Keyboard > Use all F1, F2, etc. keys as standard function keys
is selected, then the shortcut becomes
CMD + F12
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How can I erase all inline styles with javascript and leave only the styles specified in the css sty
...ps:
1: select the element you want to change by either tagname, id, class etc.
var element = document.getElementsByTagName('h2')[0];
remove the style attribute
element.removeAttribute('style');
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Initializing IEnumerable In C#
...<string> myStrings = CreateEnumerable("first item", "second item");//etc..
Alternatively just do :
IEnumerable<string> myStrings = new []{ "first item", "second item"};
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impro...
Comparing two strings, ignoring case in C# [duplicate]
... - it involves an extra string allocation
(which must later be collected), etc.
Personally, I'd use
string.Equals(val, "astringvalue", StringComparison.OrdinalIgnoreCase)
this avoids all the issues of culture-sensitive strings, but as a consequence it avoids all the issues of culture-sensitive ...
Close virtual keyboard on button press
...ice(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
I put this right after the onClick(View v) event.
You need to import android.view.inputmethod.InputMethodManage...
How can I return NULL from a generic method in C#?
... is a reference type (or a nullable value type), 0 for int, '\0' for char, etc. (Default values table (C# Reference))
Restrict T to be a reference type with the where T : class constraint and then return null as normal
shar...
AWS: How to disable all services?
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For example:
Stop running instances, delete volumes, remove elastic IPs, etc.
Otherwise, I recommend sending an email to webservices@amazon.com from the email you used to signup with their service.
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Include all existing fields and add new fields to document
...s mostly created to group/calculate data from collection fields (sum, avg, etc.) and return all the collection's fields is not direct purpose.
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