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How to write to file in Ruby?
...d to remembering the syntax for any specific one. I've googled this a few times, and I always scroll right past this answer, to the one below it, because when I google StackOverflow I'm usually just looking for a dang fish. :p Honestly tho it's good having both. Perhaps someday I will be doing eno...
Best way to alphanumeric check in JavaScript
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You don't need to do it one at a time. Just do a test for any that are not alpha-numeric. If one is found, the validation fails.
function validateCode(){
var TCode = document.getElementById('TCode').value;
if( /[^a-zA-Z0-9]/.test( TCode ) ) {
...
Does Java have a path joining method? [duplicate]
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Because the File constructor is expensive (in terms of time). It interacts with the file system (depends on the implementation). There is no need to write code that is slower on purpose. That being said, the speed should be measured, so it is possible that my code is slower. In a...
Why should I prefer to use member initialization lists?
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If a T is POD and you start preferring initialization list, then if one time T will change to a non-POD type, you won't need to change anything around initialization to avoid unnecessary constructor calls because it is already optimised.
If type T does have default constructor and one or more us...
How to assign Profile values?
...rrentUser. Since CurrentUser instantiates and returns a new instance each time, can I suggest defining it as a method instead? Without thinking, I wrote this: AccountProfile.CurrentUser.FullName = "Snoopy"; AccountProfile.CurrentUser.OtherProperty = "ABC"; AccountProfile.CurrentUser.Save(); whic...
Add column with constant value to pandas dataframe [duplicate]
...st store a column of lists, ensure not to copy the same reference multiple times.
# Wrong
df['new'] = [[]] * len(df)
# Right
df['new'] = [[] for _ in range(len(df))]
Generating a copy: df.assign(new=0)
If you need a copy instead, use DataFrame.assign:
df.assign(new='y')
A B C new
0 x...
How to test a merge without actually merging first
...'t know exactly if it is your case, but your question remember me that sometimes I start a feature, I commit over the days and I merge the develop on it many times.
On this point I lose the control over the exact files I changed and I will only know it when my feature were closed and my code go to...
Which is better in python, del or delattr?
... if you don't know the name of the attribute that you're deleting ahead of time.
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Validation failed for one or more entities. See 'EntityValidationErrors' property for more details [
... occasion. I could only upvote once. Wished they'd let me upvote for every time I've copied and pasted this.
– Damon Drake
Dec 31 '13 at 22:42
5
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HTML5 Canvas Resize (Downscale) Image High Quality?
...owser does make use of 4 pixels to make one-.
BUT... if you use several time a 2X downsampling, you'll face the issue that the successive rounding errors will add too much noise.
What's worse, you won't always resize by a power of two, and resizing to the nearest power + a last resizing is very n...