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How to debug PDO database queries?
Before moving to PDO, I created SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
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Javascript: formatting a rounded number to N decimals
...s the same as 2.0000000000000. It's when you turn the rounded value into a string that you have make it display a certain number of digits.
You could just add zeroes after the number, something like:
var s = number.toString();
if (s.indexOf('.') == -1) s += '.';
while (s.length < s.indexOf('.')...
Remove trailing newline from the elements of a string list
...str.strip only works if you're sure that the list does not contain unicode strings. If it can contain both 8-bit and unicode strings, use lambda s: s.strip() as mentioned above, or use the strip function which you can import from the strings module.
– Cito
Nov ...
Execute JavaScript code stored as a string
How do I execute some JavaScript that is a string?
20 Answers
20
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How do I run Asynchronous callbacks in Playground
...of NSURLConnection):
import UIKit
import PlaygroundSupport
let url = URL(string: "http://stackoverflow.com")!
URLSession.shared.dataTask(with: url) { data, response, error in
guard let data = data, error == nil else {
print(error ?? "Unknown error")
return
}
let conte...
Add a prefix string to beginning of each line
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@BinChen escape the / like \/ (in single-quoted strings) or \\/ (in double-quoted strings)
– user6516765
Mar 28 '17 at 5:23
8
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Check if a string is a date value
... Sorry @Asmor, this is not a correct answer. Date.parse will parse any string with a number it in.
– jwerre
Mar 10 '14 at 16:01
12
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How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
...on to just extract the file name (assuming "this" is an Activity):
public String getFileName(Uri uri) {
String result = null;
if (uri.getScheme().equals("content")) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
try {
if (cursor != null && curso...
How can query string parameters be forwarded through a proxy_pass with nginx?
The above snippet will redirect requests where the url includes the string "service" to another server, but it does not include query parameters.
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The order of elements in Dictionary
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You can order the items when enumerating them:
foreach (KeyValuePair<string, string> kvp in _Dictionary.OrderBy(k => k.Value)) {
...
}
In framework 2.0 you would first have to put the items in a list in order to sort them:
List<KeyValuePair<string, string>> items = new L...