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How to prevent the activity from loading twice on pressing the button
...ivity
android:name=".MainActivity"
android:label="@string/activity"
android:launchMode = "singleInstance" />
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Converting newline formatting from Mac to Windows
...mand: sed $'s/\r$//' Explanation: bash decodes backslash-escapes in $'...' strings. See gnu.org/software/bash/manual/html_node/ANSI_002dC-Quoting.html for details.
– jcsahnwaldt Reinstate Monica
Jan 22 '19 at 1:41
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Use cases for the 'setdefault' dict method
... but not so much if it's dynamic.
For example, I need a dictionary to map strings to unique ints. defaultdict(int) will always use 0 for the default value. Likewise, defaultdict(intGen()) always produces 1.
Instead, I used a regular dict:
nextID = intGen()
myDict = {}
for lots of complicated stuf...
NodeJS / Express: what is “app.use”?
...yer that only triggered on the path /user/:id that would be reflected as a string in the route field of that middleware layer object in the stack printout above.
Each layer is essentially adding a function that specifically handles something to your flow through the middleware.
E.g. by adding body...
Why can I throw null in Java? [duplicate]
...our method signature specifies you should return an Exception (or indeed a string, or Person class), you can throw it.
*Excluding primitive types.
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Bash: Strip trailing linebreak from output
...lt; log.txt)
Detail:
printf will print your content in place of the %s string place holder.
If you do not tell it to print a newline (%s\n), it won't.
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Html.RenderPartial giving me strange overload error?
...have to, because of performance (it first composes given partial view into string, and then parent view puts it into response*).
* this is not entirely true, they are actually being rendered into ViewContext.Writer and once whole page is rendered and composed, the whole thing goes to response
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Difference between id and name attributes in HTML
...ges with multiple <form> elements. It is traditional to use the same string for name and id where both are used on a single HTML element, but nothing makes you do this.
– Warren Young
Feb 17 '15 at 2:31
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How do I check what version of Python is running my script?
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This information is available in the sys.version string in the sys module:
>>> import sys
Human readable:
>>> print(sys.version) # parentheses necessary in python 3.
2.5.2 (r252:60911, Jul 31 2008, 17:28:52)
[GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)]...
How to align input forms in HTML
..., in a two-dimensional structure.
[consider what you would do if you had string or numeric values to display instead of input boxes.]
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