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Any equivalent to .= for adding to beginning of string in PHP?
Just wondering if there is something like .= for adding text to the beginning of a string, e.g.:
5 Answers
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What's the difference between tilde(~) and caret(^) in package.json?
... ~ assumes you can trust minor and point releases from your dependencies. If you are publishing a library and want other people to trust you, DO NOT BLINDLY ACCEPT DOWNSTREAM DEPENDENCIES. A bad dot release from your dependency can cause a chain reaction upstream, and will have people knocking at Y...
How to set current working directory to the directory of the script in bash?
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It's worth noting that things can break if a symbolic link makes up part of $0. In your script you may expect, for example, ../../ to refer to the directory two levels above the script's location, but this isn't necessarily the case if symbolic links are in play.
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How do I remove a key from a JavaScript object? [duplicate]
...ple 2
delete thisIsObject["Cow"];
// Example 3
delete thisIsObject.Cow;
If you're interested, read Understanding Delete for an in-depth explanation.
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Should arrays be used in C++?
...ge allocation ("the stack") is way faster than dynamic storage allocation. If I know I have exactly 3 elements [e.g., coordinates of a triangle], there's no reason to use vector.
– zvrba
Jun 10 '12 at 9:15
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What is the difference between connection and read timeout for sockets?
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1) What is the difference between connection and read timeout for sockets?
The connection timeout is the timeout in making the initial connection; i.e. completing the TCP connection handshake. The read timeout is the timeout on waiting t...
How to check if the string is empty?
... they are considered false in a Boolean context, so you can just do this:
if not myString:
This is the preferred way if you know that your variable is a string. If your variable could also be some other type then you should use myString == "". See the documentation on Truth Value Testing for ot...
AngularJS : automatically detect change in model
...()es for you behind the scenes.
By default $watch compares by reference. If you set the third parameter to $watch to true, Angular will instead "shallow" watch the object for changes. For arrays this means comparing the array items, for object maps this means watching the properties. So this sho...
Jquery selector input[type=text]')
...elector:
$('.sys input[type=text], .sys select').each(function() {...})
If you don't like the repetition:
$('.sys').find('input[type=text],select').each(function() {...})
Or more concisely, pass in the context argument:
$('input[type=text],select', '.sys').each(function() {...})
Note: Inter...
What happens to a detached thread when main() exits?
... joined again" is:
Yes, with the *_at_thread_exit family of functions (notify_all_at_thread_exit(), std::promise::set_value_at_thread_exit(), ...).
As noted in footnote [2] of the question, signalling a condition variable or a semaphore or an atomic counter is not sufficient to join a detached thr...