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Exit Shell Script Based on Process Exit Code
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#!/bin/bash -e is the only way to start a shell script. You can always use things like foo || handle_error $? if you need to actually examine exit statuses.
– Davis Herring
Sep 23 '17 at 5:29
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What are named pipes?
...rk read typically involves a series of peek named pipes messages before it starts to read the data. These can be very costly in a slow network and cause excessive network traffic, which in turn affects other network clients.
It is also important to clarify if you are talking about local pipes or ne...
Why should a Java class implement comparable?
...u can say
public int compareTo(Foo that) {
return ComparisonChain.start()
.compare(lastName, that.lastName)
.compare(firstName, that.firstName)
.compare(zipCode, that.zipCode)
.result();
}
instead of
public int compareTo(Person other) {
int cm...
How does JavaScript handle AJAX responses in the background?
...then while your js code proceeds executing (step 2 and after), the browser starts the real work of: 1. formatting a tcp request 2. opening a socket 3. sending headers 4. handshaking 5. sending body 6. waiting response 7. reading headers 8. reading body etc. all of this implementation is usually run'...
Can you use if/else conditions in CSS?
...If you need changing CSS, you can embed it in the page of course, but that starts to go against content/presentation separation.
– deceze♦
Jul 15 '09 at 7:17
3
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How to cast an Object to an int
...'re sure that this object is an Integer :
int i = (Integer) object;
Or, starting from Java 7, you can equivalently write:
int i = (int) object;
Beware, it can throw a ClassCastException if your object isn't an Integer and a NullPointerException if your object is null.
This way you assume that...
Check if a string is null or empty in XSLT
...only deal with nodes, or elements in this case, which is the whole between start-tag and end-tag. In short, there is no way to test for </CategoryName>, nor is there any need for.
– Abel
Jul 21 '14 at 1:51
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All possible array initialization syntaxes
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@Jeffrey: If we're going down that road,it starts getting silly. E.g., "1,2,3,4".split(',').
– Brian
Apr 15 '11 at 18:00
11
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Working copy locked error in tortoise svn while committing
...efore showing this error message (five to ten seconds currently)? So I can start the cleanup earlier.
– not-a-user
Dec 12 '18 at 11:32
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Do we need semicolon at the end? [duplicate]
...an write javascript without semicolon, you only need to insert them if you start a line with a parantesis ( or a bracket [.
The sugarjs times() function is a good example:
<script>
var somthing = 1 + 3
;(5).times(function(n){
console.log(n + " line") //prints "X line" 5 times
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