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JavaScript validation for empty input field
...
An input field can have whitespaces, we want to prevent that.
Use String.prototype.trim():
function isEmpty(str) {
return !str.trim().length;
}
Example:
const isEmpty = str => !str.trim().length;
document.getElementById("name").addEventListener("input", function() {
if(...
C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...结第1条：慎重选择容器类型。标准STL序列容器：vector、string、deque和list。标准STL关联容器：set、multiset、map和multimap。非标准序列容...
第1条：慎重选择容器类型。
标准STL序列容器：vector、string、deque和list。
标准STL关联容器：...
REST API Authentication
...every HTTP request, eg: Authorization: Basic Ym9ic2Vzc2lvbjE6czNjcmV0
The string Ym9ic2Vzc2lvbjE6czNjcmV0 above is just the string "bobsession1:s3cret" (which is a username/password) encoded in Base64.
To obtain the temporary session token above, provide an API function (eg: http://mycompany.com/ap...
When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...
#include <iostream>
#include <string>
using namespace std;
class Human {
private:
int age;
public:
string name;
Human(int humanAge, string humanName)
: age(humanAge), name(std::move(humanName)) {}
void DoSomething() {
...
EProgrammerNotFound exception in Delphi?
...
You should have seen the build with the compiler strings localized to Jive!
– dthorpe
Jul 5 '12 at 16:57
add a comment
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Transaction isolation levels relation with locks on table
...B just executes a SELECT statement to read data. C reads and updates data. All these process work on the same table T.
READ UNCOMMITTED - no lock on the table. You can read data in the table while writing on it. This means A writes data (uncommitted) and B can read this uncommitted data and use it...
Draw a perfect circle from user's touch
...;
g.drawOval(cX, cY, cD, cD);
}else{
g.drawString("Uknown",30,50);
}
}
private Type getType(int dx, int dy) {
Type result = Type.UNDEFINED;
if (dx > 0 && dy < 0) {
result = Type.RIGHT_DOWN;
} else if...
Add a space (“ ”) after an element using :after
...` \0020` as a separate answer because some fonts, eg Font Awesome will not allow \00A0 to display a space, and if you want a space between elements rather than before or after you can't use padding
– Mousey
Oct 15 '15 at 23:02
...
Git fatal: Reference has invalid format: 'refs/heads/master
...ked absolutely perfect for me :) thx - for me dropbox created some strange string filename which was not compatible to "update"
– cV2
May 5 '14 at 20:12
...
how to convert a string date into datetime format in python? [duplicate]
How do I convert a a string of datetime into datetime format in python so that it can be compared with another date?
2 Answ...