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Checking if output of a command contains a certain string in a shell script
I'm writing a shell script, and I'm trying to check if the output of a command contains a certain string. I'm thinking I probably have to use grep, but I'm not sure how. Does anyone know?
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What is the EAFP principle in Python?
...e assumes the existence of valid keys or attributes and catches exceptions if the assumption proves false. This clean and fast style is characterized by the presence of many try and except statements. The technique contrasts with the LBYL style common to many other languages such as C.
An example ...
How to make ThreadPoolExecutor's submit() method block if it is saturated?
... of code indeed comes from Java Concurrency in Practice, and it is correct if you take its context into account. The book clearly states, literally: "In such an approach, use an unbounded queue (...) and set the bound on the semaphore to be equal to the pool size plus the number of queued tasks you ...
$(window).width() not the same as media query
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If you don't have to support IE9 you can just use window.matchMedia() (MDN documentation).
function checkPosition() {
if (window.matchMedia('(max-width: 767px)').matches) {
//...
} else {
//...
}
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How to determine an object's class?
If class B and class C extend class A and I have an object of type B or C , how can I determine of which type it is an instance?
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Angularjs Template Default Value if Binding Null / Undefined (With Filter)
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This doesn't work if you need to display a '0' value in column
– neel shah
Jun 23 '14 at 11:30
6
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What happens to a declared, uninitialized variable in C? Does it have a value?
If in C I write:
10 Answers
10
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MySQL: Insert record if not exists in table
...Rupert | Somewhere | 022 |
+----+--------+-----------+------+
Insert a different record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'John', 'Doe', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'John'
) LIMIT 1;
Query OK, 1 row af...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
...all active elevators (not in maintenance).
The scheduling will be like:
if available pick a standing elevator for this floor.
else pick an elevator moving to this floor.
else pick a standing elevator on an other floor.
else pick the elevator with the lowest load.
Each elevator has a set of stat...
How do I check if a property exists on a dynamic anonymous type in c#?
... public static bool IsPropertyExist(dynamic settings, string name)
{
if (settings is ExpandoObject)
return ((IDictionary<string, object>)settings).ContainsKey(name);
return settings.GetType().GetProperty(name) != null;
}
var settings = new {Filename = @"c:\temp\q.txt"};
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