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How to check if a file exists from inside a batch file [duplicate]
I need to run a utility only if a certain file exists. How do I do this in Windows batch?
3 Answers
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Python: Ignore 'Incorrect padding' error when base64 decoding
...ome data that is base64 encoded that I want to convert back to binary even if there is a padding error in it. If I use
17 ...
Why does 'continue' behave like 'break' in a Foreach-Object?
If I do the following in a PowerShell script:
4 Answers
4
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Append to a file in Go
...f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
panic(err)
}
defer f.Close()
if _, err = f.WriteString(text); err != nil {
panic(err)
}
share
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Iterate over object keys in node.js
...low for better optimisation.
Benchmark
As you can see Object.keys is significantly faster. Whether the actual memory storage is more optimum is a different matter.
var async = {};
async.forEach = function(o, cb) {
var counter = 0,
keys = Object.keys(o),
len = keys.length;
var next = f...
Parse config files, environment, and command-line arguments, to get a single collection of options
...es it so that,
my_prog --foo=bar
is equivalent to
my_prog @baz.conf
if @baz.conf is,
--foo
bar
You can even have your code look for foo.conf automatically by modifying argv
if os.path.exists('foo.conf'):
argv = ['@foo.conf'] + argv
args = argparser.parse_args(argv)
The format of the...
How to get the filename without the extension from a path in Python?
...
/path/to/some/file
Documentation for os.path.splitext.
Important Note: If the filename has multiple dots, only the extension after the last one is removed. For example:
import os
print(os.path.splitext("/path/to/some/file.txt.zip.asc")[0])
Prints:
/path/to/some/file.txt.zip
See other answe...
How to join strings in Elixir?
...
If you just want to join some arbitrary list:
"StringA" <> " " <> "StringB"
or just use string interpolation:
"#{a} #{b}"
If your list size is arbitrary:
Enum.join(["StringA", "StringB"], " ")
... all of...
How to use `string.startsWith()` method ignoring the case?
...The big problem here is the performance. For small Strings no problem, but if you have a big one... I mean... Do you really will do a toUpperCase in a 1mb String just to compare 4-10 inicial characters?
– Dyorgio
Apr 7 '16 at 16:52
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Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
...ting SQL commands because it is more efficient to SELECT columns you specifically need.
47 Answers
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