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'const string' vs. 'static readonly string' in C#
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When you use a const string, the compiler embeds the string's value at compile-time.
Therefore, if you use a const value in a different assembly, then update the original assembly and change the value, the other assembly won't see the change until you re-com...
How to create a new database using SQLAlchemy?
...amed postgres to use the postgres role, so the simplest thing is to just become that user. At any rate, create an engine as usual with a user that has the permissions to create a database:
>>> engine = sqlalchemy.create_engine("postgres://postgres@/postgres")
You cannot use engine.execu...
When to use pip requirements file versus install_requires in setup.py?
... what you know does work, and may include optional dependencies that you recommend. For example you might use SQLAlchemy but suggest MySQL, and so put MySQLdb in the requirements file).
So, in summary: install_requires is to keep people away from things that you know don't work, while requirements...
Check if object exists in JavaScript
... if its always a string, you really could(should) do !== for the comparison.
– Micah
Dec 8 '12 at 14:02
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Running code in main thread from another thread
...ntion, that I need to update it. Since the original answer was posted, the comment from @dzeikei has gotten almost as much attention as the original answer. So here are 2 possible solutions:
1. If your background thread has a reference to a Context object:
Make sure that your background worker thr...
How to handle the modal closing event in Twitter Bootstrap?
... has finished being hidden from the user (will wait for CSS transitions to complete).
And provide an example on how to use them:
$('#myModal').on('hidden.bs.modal', function () {
// do something…
})
Legacy Bootstrap 2.3.2 answer
Bootstrap's documentation refers two events you can use.
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space between divs - display table-cell
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Need to understand the usage of SemaphoreSlim
...ame time.
Calling WaitAsync on the semaphore produces a task that will be completed when that thread has been given "access" to that token. await-ing that task lets the program continue execution when it is "allowed" to do so. Having an asynchronous version, rather than calling Wait, is important...
Spring Cache @Cacheable - not working while calling from another method of the same bean
...in the same class will not get the cached value.
From https://code.google.com/p/ehcache-spring-annotations/wiki/UsingCacheable
Only external method calls coming in through the proxy are
intercepted. This means that self-invocation, in effect, a method
within the target object calling anothe...
Changing API level Android Studio
...radle(Project: yourproject).
An example of build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion "28.0.2"
defaultConfig {
applicationId "com.stackoverflow.answer"
minSdkVersion 21
targetSdkVersion 28
ve...